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Threatened & Endangered
About PLANTS Threatened & Endangered

Protected Plants for All Scientific Names
Jurisdiction = Federal and State
5703 records returned

Click on an accepted name below to view its PLANTS Profile with more information. Click on a place name in the reference list to view its T&E list, or click on the reference link to see published lists and learn more about each law. Protected plants that are synonyms retain their protected status, and are indented beneath the current PLANTS accepted name; common names are from PLANTS.

United States USFWS Endangered Species Program. 2006. All plants (5 May 2006). US Fish and Wildlife Service, Washington, DC.
Arizona Department of Agriculture. 1999. Appendix A: Protected native plants by categories (20 October 2002). State of Arizona, Arizona.
Arkansas Department of Arkansas Heritage, Inventory Research Program. 2001. Plants of special concern. Arkansas Natural Heritage Commission, Arkansas.
California Threatened and endangered plants (1 October 2011). California Department of Fish and Game.
Connecticut Connecticut Department of Environmental Protection. 1998. Endangered, threatened & special concern plants (20 October 2002). State of Connecticut, Connecticut.
Florida Coile, N.C., and M.A. Garland. 2003. Notes on Florida's endangered and threatened plants (29 January 2005). Florida Department of Agriculture & Consumer Services, Division of Plant Industry, Florida.
Georgia Wildlife Resources Division, Nongame Wildlife & Natural Heritage Section. 2001. Protected plants of Georgia (20 October 2002). Georgia Department of Natural Resources, Georgia.
Illinois Endangered Species Protection Board. 1999. Endangered and threatened species list (20 October 2002). Illinois Department of Natural Resources, Illinois.
Indiana Division of Nature Preserves. 2002. Endangered, threatened, and rare vascular plant species documented from Indiana (20 October 2002). Indiana Department of Natural Resources, Indiana.
Iowa Parks, Recreation, and Preserves Division. 1994. Iowa's threatened and endangered species (20 October 2002). Iowa Department of Natural Resources, Iowa.
Kentucky Kentucky State Nature Preserves Commission. 2000. Endangered, threatened, and special concern species (20 October 2002). Kentucky State Nature Preserves Commission, Kentucky.
Maine Maine Natural Areas Program. 1999. Maine's rare, threatened, and endangered plants (20 October 2002). Maine Department of Conservation, Maine.
Maryland Maryland Natural Heritage Program. 1997. Rare, threatened and endangered plants of Maryland (20 October 2002). Maryland Department of Natural Resources, Maryland.
Massachusetts Natural Heritage and Endangered Species Program. 2004. Massachusetts list of endangered, threatened, and special concern species (29 January 2005). Massachusetts Division of Fisheries and Wildlife, Massachusetts.
Michigan Michigan Natural Features Inventory. 1999. Michigan's special plants (20 October 2002). Michigan Department of Natural Resources, Michigan.
Minnesota Division of Fish and Wildlife. 2001. Minnesota's list of endangered, threatened and special concern species (20 October 2002). Minnesota Department of Natural Resources, Minnesota.
Missouri Missouri Department of Conservation. 2001. Missouri species of conservation concern checklist (20 October 2002). Natural History Division, Missouri.
Nebraska Nongame and Endangered Species Program. 2002. Endangered and threatened wildlife (20 October 2002). Nebraska Game and Parks Commission, Nebraska.
Nevada Nevada Natural Heritage Program. 2001. Christmas trees, cacti, and yucca native to Nevada (20 October 2002). Department of Conservation and Natural Resources, Nevada.
Nevada Nevada Natural Heritage Program. 2001. State of Nevada list of fully protected plant species (20 October 2002). Department of Conservation and Natural Resources, Nevada.
New Hampshire New Hampshire Natural Heritage Inventory. 2002. Rare plant list for New Hampshire (20 October 2002). Division of Forests and Lands, New Hampshire.
New Jersey Office of Natural Lands Management. 2001. Special plants of New Jersey (20 October 2002). Department of Environmental Protection and Energy, New Jersey.
New Mexico Forestry and Resources Conservation Division. 1995. List of New Mexico state endangered plant species (20 October 2002). Energy, Minerals and Natural Resources Department, New Mexico.
New York Department of Environmental Conservation. 2000. Protected native plants (20 October 2002). Division of Land and Forests, New York.
North Carolina Plant Industry Division. 1998. List of North Carolina's endangered, threatened, and special concern plant species (20 October 2002). North Carolina Department of Agriculture and Consumer Services, North Carolina.
Ohio Division of Natural Areas and Preserves. 2001. Rare native Ohio plants, 2000-2001 status list (20 October 2002). Ohio Department of Natural Resources, Ohio.
Oregon Oregon Natural Heritage Information Center. 2004. Rare, threatened and endangered species of Oregon (5 May 2006). Oregon Natural Heritage Information Center, Oregon.
Pennsylvania Thompson, S.A. 1997. Vascular plants: review of status in Pennsylvania (20 October 2002). Department of Conservation and Natural Resources, Pennsylvania.
Puerto Rico Puerto Rico Heritage Program. 1995. Endangered, threatened and proposed plants of Puerto Rico (20 October 2002). Department of Natural Environmental Resources, Puerto Rico.
Rhode Island Enser, R.W. 2002. Rare native plants of Rhode Island (20 October 2002). Rhode Island Department of Environmental Management, Rhode Island.
Tennessee Tennessee Natural Heritage Program. 2002. Rare plant list (20 October 2002). Department of Environment and Conservation, Tennessee.
Texas Texas Parks and Wildlife Department. 2002. Texas threatened and endangered plants (20 October 2002). Texas Parks and Wildlife Department, Texas.
Vermont Nongame and Natural Heritage Program. 1999. Vermont's rare and uncommon native plants (20 October 2002). Vermont Department of Fish and Wildlife Nongame and Natural Heritage Program, Vermont.
Virginia Division of Natural Heritage. 2001. Rare vascular plants (20 October 2002). Virginia Department of Conservation and Recreation, Virginia.
Washington Washington Natural Heritage Program. 2002. Endangered, threatened and sensitive vascular plants of Washington (20 October 2002). Washington State Department of Natural Resources, Washington.
Wisconsin Wisconsin Department of Natural Resources. 2002. The working list: rare vascular plants (29 January 2006). Bureau of Endangered Resources, Wisconsin.

Symbol Scientific Name Common Name Federal Protected Status State Protected Status
ABBA Abies balsamea (L.) Mill. balsam fir CT (E)
ABCO Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. white fir NV (CY)
ABFR Abies fraseri (Pursh) Poir. Fraser fir TN (T)
ABGU Abies guatemalensis Rehder Guatemalan fir T
ABLAL Abies lasiocarpa (Hook.) Nutt. var. lasiocarpa subalpine fir
ABBI3 Abies bifolia A. Murray bis NV (CY)
ABLO Abies lowiana (Gordon & Glend.) A. Murray bis Sierra white fir
ABCOL Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. var. lowiana (Gord. & Glend.) Lemmon white fir
ABMA Abies magnifica A. Murray bis California red fir NV (CY)
ABMA5 Abronia macrocarpa L.A. Galloway largefruit sand verbena E TX (E)
ABUMB Abronia umbellata Lam. ssp. breviflora (Standl.) Munz pink sand verbena OR (E)
ABUMA2 Abronia umbellata Lam. ssp. acutalata (Standl.) Tillett WA (PX)
ABER Abutilon eremitopetalum Caum hiddenpetal Indian mallow E
ABME2 Abutilon menziesii Seem. ko'oloa 'ula E
ABSA2 Abutilon sandwicense (O. Deg.) Christoph. greenflower Indian mallow E
ACAN Acacia angustissima (Mill.) Kuntze prairie acacia FL (E)
ACCH Acacia choriophylla Benth. cinnecord FL (E)
ACTO Acacia tortuosa (L.) Willd. poponax FL (E)
ACEX Acaena exigua A. Gray liliwai E
ACDE4 Acalypha deamii (Weath.) H.E. Ahles Deam's threeseed mercury IN (T), PA (X), TN (SC)
ACVID Acalypha virginica L. var. deamii Weath. OH (PRX)
ACVI Acalypha virginica L. Virginia threeseed mercury CT (SC), ME (PX), NH (T), NY (E)
ACTE4 Acanthocereus tetragonus (L.) Humm. triangle cactus
ACPE5 Acanthocereus pentagonus (L.) Britton & Rose FL (T)
ACDU2 Acanthomintha duttonii (Abrams) Jokerst San Mateo thorn-mint CA (E)
ACOBD Acanthomintha obovata Jeps. ssp. duttonii Abrams E
ACIL Acanthomintha ilicifolia (A. Gray) A. Gray San Diego thorn-mint T CA (E)
ACLE Acer leucoderme Small chalk maple
ACSAL Acer saccharum Marsh. ssp. leucoderme (Small) Desmarais TN (SC)
ACNI5 Acer nigrum Michx. f. black maple CT (SC), MA (SC), NH (T)
ACPE Acer pensylvanicum L. striped maple OH (E), RI (SC)
ACSP2 Acer spicatum Lam. mountain maple KY (E), RI (T)
ACMIB Achillea millefolium L. var. borealis (Bong.) Farw. boreal yarrow ME (SC)
ACSI Achillea sibirica Ledeb. Siberian yarrow MN (T)
ACHY Achnatherum hymenoides (Roem. & Schult.) Barkworth Indian ricegrass
ORHY Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper MN (E)
ACMU2 Achyranthes mutica A. Gray blunt chaff flower E
ACSPR2 Achyranthes splendens Mart. ex Moq. var. rotundata Hillebr. Maui chaff flower E
ACOP Acmella oppositifolia (Lam.) R.K. Jansen oppositeleaf spotflower TN (SC)
ACWR4 Acoelorrhaphe wrightii (Griseb. & H. Wendl.) H. Wendl. ex Becc. Everglades palm FL (T)
ACNO2 Aconitum noveboracense A. Gray ex Coville northern blue monkshood T IA (T), NY (T), OH (E), WI (T)
ACRE Aconitum reclinatum A. Gray trailing white monkshood PA (E), TN (E)
ACUN Aconitum uncinatum L. southern blue monkshood IN (E), KY (T), MD (E), OH (E), PA (T)
ACAM Acorus americanus (Raf.) Raf. sweetflag PA (E)
ACCI3 Acrobolbus ciliatus (Mitt.) Schiffn. TN (SC)
ACAU3 Acrostichum aureum L. golden leatherfern FL (T)
ACAR18 Actaea arizonica (S. Watson) J. Compton Arizona bugbane
CIAR Cimicifuga arizonica S. Watson AZ (HS)
ACEL4 Actaea elata (Nutt.) Prantl tall bugbane
CIEL Cimicifuga elata Nutt. WA (T)
ACPA Actaea pachypoda Elliot white baneberry FL (E), NY (EV)
ACPO11 Actaea podocarpa DC. mountain bugbane
CIAM Cimicifuga americana Michx. IL (E), PA (R)
ACRAR Actaea racemosa L. var. racemosa black bugbane
CIRA Cimicifuga racemosa (L.) Nutt. IL (E), MA (E)
ACRU14 Actaea rubifolia (Kearney) Kartesz Appalachian bugbane
CIRU Cimicifuga rubifolia Kearney IL (T), IN (E), KY (T), TN (T)
ACRU2 Actaea rubra (Aiton) Willd. red baneberry IN (R), OH (T), RI (SC)
ACRUR2 Actaea rubra (Aiton) Willd. ssp. rubra red baneberry
ACSPR3 Actaea spicata L. ssp. rubra (Aiton) Hultén NY (EV)
ACPE2 Actinostachys pennula (Sw.) Hook. ray fern
SCGE3 Schizaea germanii (Fée) Prantl FL (E)
ADPE2 Adenophorus periens Bishop pendant kihifern E
ADAL Adiantum aleuticum (Rupr.) Paris Aleutian maidenhair ME (E)
ADCA Adiantum capillus-veneris L. common maidenhair KY (T), NC (E)
ADME Adiantum melanoleucum Willd. fragrant maidenhair FL (E)
ADPE Adiantum pedatum L. northern maidenhair NY (EV)
ADTE Adiantum tenerum Sw. fan maidenhair FL (E)
ADVI3 Adiantum viridimontanum Paris Green Mountain maidenhair VT (T)
ADVI4 Adiantum vivesii Proctor Puerto Rico maidenhair E PR (E)
ADFU Adlumia fungosa (Aiton) Greene ex Britton, Sterns & Poggenb. allegheny vine IN (X), KY (E), ME (T), MD (T), MA (T), NH (T), OH (T), RI (E), TN (T)
ADMO Adoxa moschatellina L. muskroot IL (E), NY (E), WI (T)
AEPR Aeschynomene pratensis Small meadow jointvetch FL (E)
AEVI3 Aeschynomene virginica (L.) Britton, Sterns & Poggenb. Virginia jointvetch T MD (E), NJ (E), NC (E), PA (X)
AEPA Aesculus pavia L. red buckeye KY (T)
AGAC Agalinis acuta Pennell sandplain false foxglove E CT (E), MD (E), MA (E), NY (E), RI (E)
AGAU3 Agalinis auriculata (Michx.) S.F. Blake earleaf false foxglove IN (E), KY (E), MD (E), MN (E), OH (E), TN (E)
TOAU Tomanthera auriculata (Michx.) Raf. IL (T), MI (PREX), PA (E)
AGFA2 Agalinis fasciculata (Elliot) Raf. beach false foxglove MD (E), NY (R)
AGGA Agalinis gattingeri (Small) Small roundstem false foxglove IA (T), MI (E), MN (E), OH (PRX), WI (T)
AGMA3 Agalinis maritima (Raf.) Raf. saltmarsh false foxglove ME (SC), NH (T)
AGNE5 Agalinis neoscotica (Greene) Fernald Middleton false foxglove ME (T)
AGOB Agalinis obtusifolia Raf. tenlobe false foxglove KY (E), MD (E)
AGDE5 Agalinis decemloba (Greene) Pennell PA (X)
AGOL Agalinis oligophylla Pennell ridgestem false foxglove
AGPS3 Agalinis pseudaphylla (Pennell) Shinners TN (E)
AGPA12 Agalinis paupercula (A. Gray) Britton smallflower false foxglove PA (E)
AGPAB Agalinis paupercula (A. Gray) Britton var. borealis Pennell smallflower false foxglove NY (T)
AGPUP Agalinis purpurea (L.) Pennell var. parviflora (Benth.) B. Boivin OH (E)
AGPL Agalinis plukenetii (Elliot) Raf. Chattahoochee false foxglove TN (PX, E)
AGSE3 Agalinis setacea (J.F. Gmel.) Raf. threadleaf false foxglove MD (E)
AGSK Agalinis skinneriana (Alph. Wood) Britton Skinner's false foxglove IL (T), IN (E), IA (E), KY (E), MD (E), MI (E), OH (E), WI (E)
AGTE3 Agalinis tenuifolia (Vahl) Raf. slenderleaf false foxglove RI (SC)
AGFO Agastache foeniculum (Pursh) Kuntze blue giant hyssop IA (E)
AGNE2 Agastache nepetoides (L.) Kuntze yellow giant hyssop CT (SC), NY (T), VT (T), WI (T)
AGSC Agastache scrophulariifolia (Willd.) Kuntze purple giant hyssop CT (E), KY (SC), MD (T), MA (E), TN (SC), VT (T)
AGAR8 Agave ×arizonica Gentry & J.Z. Weber (pro sp.) [chrysantha × toumeyana] Arizona century plant
AGAR3 Agave arizonica Gentry & J.Z. Weber E AZ (HS)
AGCH2 Agave chrysantha Peebles goldenflower century plant AZ (SR)
AGDE10 Agave delamateri W.C. Hodgson & L. Slauson Tonto Basin century plant AZ (HS)
AGDES Agave deserti Engelm. ssp. simplex Gentry desert agave AZ (SR)
AGMU Agave murpheyi F. Gibson Murphey's century plant AZ (HS)
AGPA3 Agave palmeri Engelm. Palmer's century plant AZ (SR)
AGPAP5 Agave parryi Engelm. ssp. parryi Parry's agave AZ (SR)
AGPAC Agave parryi Engelm. var. couesii (Engelm. ex Trel.) Kearney & Peebles AZ (SR)
AGPA5 Agave parviflora Torr. smallflower century plant AZ (HS, SR)
AGSCS2 Agave schottii Engelm. var. schottii Schott's century plant AZ (SR)
AGSCT Agave schottii Engelm. var. treleasei (Toumey) Kearney & Peebles Trelease's century plant AZ (HS, SR)
AGTOB Agave toumeyana Trel. ex Standl. var. bella Breitung Toumey's century plant AZ (SR)
AGTOT Agave toumeyana Trel. ex Standl. var. toumeyana Toumey's century plant AZ (SR)
AGUN2 Agave univittata Haw. McKelvey's century plant
AGMC Agave mckelveyana Gentry, nom. nud. AZ (SR)
AGUTK Agave utahensis Engelm. var. kaibabensis (McKelvey) Breitung Kaibab agave AZ (SR)
AGUTU Agave utahensis Engelm. var. utahensis Utah agave AZ (SR)
AGAR4 Ageratina aromatica (L.) Spach lesser snakeroot MA (E)
AGARA Ageratina aromatica (L.) Spach var. aromatica lesser snakeroot
EUAR7 Eupatorium aromaticum L. CT (E), NY (E), OH (T), RI (H)
AGLU Ageratina luciae-brauniae (Fernald) King & H. Rob. Lucy Braun's snakeroot KY (SC), TN (T)
AGLI3 Ageratum littorale A. Gray Cape Sable whiteweed FL (E)
AGEL Agoseris elata (Nutt.) Greene tall agoseris WA (S)
AGGL Agoseris glauca (Pursh) Raf. pale agoseris MI (T)
AGGR2 Agrimonia gryposepala Wallr. tall hairy agrimony KY (T)
AGIN3 Agrimonia incisa Torr. & A. Gray incised agrimony FL (E)
AGPA6 Agrimonia parviflora Aiton harvestlice CT (SC), MA (E)
AGPU Agrimonia pubescens Wallr. soft agrimony MA (T), RI (H)
AGRO3 Agrimonia rostellata Wallr. beaked agrimony NY (T)
AGST Agrimonia striata Michx. roadside agrimony MD (E)
AGBL Agrostis blasdalei Hitchc. Blasdale bentgrass
AGBLM Agrostis blasdalei Hitchc. var. marinensis Crampton CA (R)
AGEL4 Agrostis elliottiana Schult. Elliott's bentgrass OH (PRX)
AGME3 Agrostis mertensii Trin. northern bentgrass ME (T), NY (T), TN (SC)
AGBO2 Agrostis borealis Hartm. WA (S)
AGPE Agrostis perennans (Walter) Tuck. upland bentgrass
AGAL8 Agrostis altissima (Walter) Tuck. PA (X)
ALMA Alectryon macrococcus Radlk. Hawai'i alectryon E
ALAU Aletris aurea Walter golden colicroot MD (E, X)
ALBR6 Aletris bracteata Northrop bracted colicroot FL (E)
ALFA2 Aletris farinosa L. white colicroot ME (PX), NY (T), PA (E), RI (SC)
ALFO3 Aliciella formosa (Greene ex Brand) J.M. Porter Aztec gilia
GIFO Gilia formosa Greene ex Brand NM (E)
ALLE7 Aliciella leptomeria (A. Gray) J.M. Porter sand gilia
GILE3 Gilia leptomeria A. Gray WA (S)
ALTR7 Alisma triviale Pursh northern water plantain NJ (E)
ALPLA Alisma plantago-aquatica L. var. americanum Schult. PA (E)
ALAC4 Allium acuminatum Hook. tapertip onion AZ (SR)
ALATC Allium atrorubens S. Watson var. cristatum (S. Watson) McNeal darkred onion
ALNEC Allium nevadense S. Watson var. cristatum (S. Watson) Ownbey AZ (SR)
ALBI Allium bigelovii S. Watson Bigelow's onion AZ (SR)
ALBI2 Allium bisceptrum S. Watson twincrest onion AZ (SR)
ALBU2 Allium burdickii (Hanes) A.G. Jones narrowleaf wild leek NY (E), TN (CE, T)
ALCA2 Allium campanulatum S. Watson dusky onion WA (S)
ALCA3 Allium canadense L. meadow garlic ME (SC), NH (E), VT (T)
ALCE2 Allium cernuum Roth nodding onion IA (T), MN (T), NY (T)
ALCEN Allium cernuum Roth var. neomexicanum (Rydb.) J.F. Macbr. New Mexican nodding onion AZ (SR)
ALCEO Allium cernuum Roth var. obtusum Cockerell ex J.F. Macbr. nodding onion AZ (SR)
ALCO3 Allium constrictum (Ownbey & Mingrone) P. Peterson, Annable & Rieseberg Grand Coulee onion WA (S)
ALDI3 Allium dictuon H. St. John Blue Mountain onion WA (T)
ALGEG Allium geyeri S. Watson var. geyeri Geyer's onion AZ (SR)
ALGET Allium geyeri S. Watson var. tenerum M.E. Jones bulbil onion AZ (SR)
ALGL Allium glandulosum Link & Otto gland onion
ALRH Allium rhizomatum Woot. & Standl. AZ (SR)
ALGO Allium gooddingii Ownbey Goodding's onion AZ (HS), NM (E)
ALKU Allium kunthii G. Don Kunth's onion AZ (SR)
ALMA4 Allium macropetalum Rydb. largeflower onion AZ (SR)
ALMU6 Allium munzii (Ownbey ex Traub) McNeal Munz's onion E CA (T)
ALNE Allium nevadense S. Watson Nevada onion AZ (SR)
ALPA2 Allium parishii S. Watson Parish's onion AZ (SR)
ALPL4 Allium plummerae S. Watson Tanners Canyon onion AZ (SR)
ALSC Allium schoenoprasum L. wild chives MI (T)
ALSCS Allium schoenoprasum L. var. sibiricum (L.) Hartm. wild chives MN (T), NH (T)
ALSP2 Allium speculae Ownbey & Aase Little River Canyon onion GA (T)
ALST Allium stellatum Fraser ex Ker Gawl. autumn onion TN (E)
ALTR3 Allium tricoccum Aiton ramp ME (SC), RI (SC), TN (SC, CE)
ALYO Allium yosemitense Eastw. Yosemite onion CA (R)
ALOA Allocetraria oaksiana (Tuck.) Randlane & A. Thell
CEOA Cetraria oakesiana Tuck. MN (T)
ALINR Alnus incana (L.) Moench ssp. rugosa (Du Roi) R.T. Clausen speckled alder IL (E)
ALVIC Alnus viridis (Chaix) DC. ssp. crispa (Aiton) Turrill mountain alder MA (T), PA (E), TN (SC)
ALAE Alopecurus aequalis Sobol. shortawn foxtail CT (T)
ALAES Alopecurus aequalis Sobol. var. sonomensis P. Rubtzov Sonoma shortawn foxtail E
ALLY3 Alsinidendron lychnoides (Hillebr.) Sherff kuawawaenohu E
ALOB4 Alsinidendron obovatum Sherff Waianae Range alsinidendron E
ALTR5 Alsinidendron trinerve H. Mann mountain alsinidendron E
ALVI6 Alsinidendron viscosum (H. Mann) Sherff climbing alsinidendron E
ALAM5 Alsophila amintae Conant forest alsophila
CYDR2 Cyathea dryopteroides Maxon E PR (E)
ALAM3 Alvaradoa amorphoides Liebm. Mexican alvaradoa FL (E)
AMBR5 Amaranthus brownii Christoph. & Caum Brown's amaranth E
AMCA2 Amaranthus cannabinus (L.) Sauer tidalmarsh amaranth PA (R)
AMPU2 Amaranthus pumilus Raf. seaside amaranth T CT (SC), MD (E), NJ (E), NY (E), NC (T), RI (E)
AMCH2 Ambrosia cheiranthifolia A. Gray Rio Grande ragweed E TX (E)
AMPU4 Ambrosia pumila (Nutt.) A. Gray dwarf bur ragweed E
AMBA Amelanchier bartramiana (Tausch) M. Roem. oblongfruit serviceberry MA (T), PA (E)
AMHU2 Amelanchier humilis Wiegand low serviceberry IN (E), PA (E)
AMIN2 Amelanchier interior E.L. Nielsen Pacific serviceberry IL (E)
AMNA2 Amelanchier nantucketensis E.P. Bicknell Nantucket serviceberry ME (T), MA (SC), NY (E)
AMOB2 Amelanchier obovalis (Michx.) Ashe coastal serviceberry MD (E), PA (E)
AMSA Amelanchier sanguinea (Pursh) DC. roundleaf serviceberry CT (E), IL (E), MA (SC), NJ (E), OH (E), PA (E), TN (T)
AMSAG Amelanchier sanguinea (Pursh) DC. var. gaspensis Wiegand Gaspé serviceberry ME (SC)
AMST80 Amelanchier stolonifera Wiegand running serviceberry MD (T), TN (SC)
AMRO Amerorchis rotundifolia (Banks ex Pursh) Hultén roundleaf orchid ME (T), MI (E), WI (T)
AMMU Amianthium muscitoxicum (Walter) A. Gray flypoison KY (T)
AMCO Ammannia coccinea Rottb. valley redstem PA (T)
AMLA3 Ammannia latifolia L. pink redstem NJ (E)
AMRO3 Ammannia robusta Heer & Regel grand redstem WA (S)
AMBR Ammophila breviligulata Fernald American beachgrass IL (E), MN (T), OH (T), PA (T)
AMCH6 Ammophila champlainensis Seymour Champlain beachgrass NY (E), VT (E)
AMPO4 Ammoselinum popei Torr. & A. Gray plains sandparsley TN (T)
AMGO Amoreuxia gonzalezii Sprague & Riley Santa Rita mountain yellowshow AZ (HS)
AMGEC Amorpha georgiana Wilbur var. confusa Wilbur Georgia false indigo NC (T)
AMGEG Amorpha georgiana Wilbur var. georgiana Georgia false indigo NC (E)
AMHEC Amorpha herbacea Walter var. crenulata (Rydb.) Isely clusterspike false indigo
AMCR5 Amorpha crenulata Rydb. E FL (E)
AMNA Amorpha nana Nutt. dwarf false indigo IA (T)
AMNI Amorpha nitens Boynt. shining false indigo IL (E)
AMPA4 Amorpha paniculata Torr. & A. Gray panicled false indigo AR (T)
AMPU7 Amphianthus pusillus Torr. little amphianthus T GA (T)
AMBRC Amphicarpaea bracteata (L.) Fernald var. comosa (L.) Fernald American hogpeanut NH (T)
AMPU6 Amphicarpum purshii Kunth blue maidencane NY (E)
AMAM Amphicarpum amphicarpon (Pursh) Nash MA (E)
AMCA8 Amsinckia carinata A. Nelson & J.F. Macbr. Malheur Valley fiddleneck OR (T)
AMGR3 Amsinckia grandiflora (Kleeb. ex A. Gray) Kleeb. ex Greene largeflowered fiddleneck E CA (E)
AMKE Amsonia kearneyana Woodson Kearney's bluestar E AZ (HS)
AMTAG Amsonia tabernaemontana Walter var. gattingeri Woodson eastern bluestar KY (T), TN (SC)
AMTH Amsonia tharpii Woodson feltleaf bluestar NM (E)
ANMI4 Anagallis minima (L.) Krause chaffweed MD (E, X)
ANSA7 Anastrophyllum saxicola (Schrad.) R.M. Schust. TN (SC)
ANRUR Andreaea rupestris Hedw. var. rupestris andreaea moss OH (PRX)
ANPO Andromeda polifolia L. bog rosemary PA (R)
ANPOG Andromeda polifolia L. var. glaucophylla (Link) DC. bog rosemary
ANGL Andromeda glaucophylla Link CT (T), IN (R), NJ (E), OH (PRX), RI (E)
ANAR2 Andropogon arctatus Chapm. pinewoods bluestem FL (T)
ANGLG2 Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. var. glomeratus bushy bluestem
ANVIA Andropogon virginicus L. var. abbreviatus (Hack.) Fernald & Grisc. OH (E)
ANGR5 Andropogon gracilis Spreng. wire bluestem
SCSE3 Schizachyrium sericatum (Swallen) Gould FL (E)
ANOC2 Androsace occidentalis Pursh western rockjasmine IN (T), MI (E), OH (T)
ANBR4 Androstephium breviflorum S. Watson pink funnel lily AZ (SR)
ANWR4 Anemia wrightii Baker Wright's flowering fern FL (E)
ANCA8 Anemone canadensis L. Canadian anemone CT (E), KY (H), MD (E, X), TN (E)
ANCA9 Anemone caroliniana Walter Carolina anemone IN (X), TN (E), WI (E)
ANCY Anemone cylindrica A. Gray candle anemone NJ (E), OH (T), PA (E), RI (SC)
ANMU Anemone multifida Poir. Pacific anemone ME (T), VT (E)
ANMUM3 Anemone multifida Poir. var. multifida Pacific anemone
ANMUH2 Anemone multifida Poir. var. hudsoniana DC. WI (E)
ANVI3 Anemone virginiana L. tall thimbleweed RI (H)
ANBE2 Angadenia berteroi (A. DC.) Miers pineland golden trumpet FL (T)
ANAT Angelica atropurpurea L. purplestem angelica MD (E, X), RI (E), TN (T)
ANLU Angelica lucida L. seacoast angelica CT (E), NY (E), RI (T)
ANTR2 Angelica triquinata Michx. filmy angelica KY (E), MD (E)
ANVE Angelica venenosa (Greenway) Fernald hairy angelica CT (SC)
ANFI4 Anomobryum filiforme (Dicks.) Solms filiform anomobryum moss OH (PRX)
ANRU5 Anomodon rugelii (Müll. Hal.) Keissl. Rugel's anomodon moss KY (T)
ANCO Antennaria corymbosa E.E. Nelson flat-top pussytoes WA (S)
ANHOC Antennaria howellii Greene ssp. canadensis (Greene) Bayer Canadian pussytoes
ANCA38 Antennaria canadensis Greene NJ (E)
ANHOP Antennaria howellii Greene ssp. petaloidea (Fernald) Bayer small pussytoes
ANNEP3 Antennaria neglecta Greene var. petaloidea (Fernald) Cronquist CT (SC)
ANPA4 Antennaria parvifolia Nutt. small-leaf pussytoes WA (S)
ANRO2 Antennaria rosea Greene rosy pussytoes MI (T)
ANSO Antennaria solitaria Rydb. singlehead pussytoes MD (T), PA (E)
ANVI13 Antennaria virginica Stebbins shale barren pussytoes OH (T), PA (R)
ANMOA3 Anthoxanthum monticola (Bigelow) Veldkamp ssp. alpinum (Sw. ex Willd.) Soreng alpine sweetgrass
HIAL3 Hierochloe alpina (Sw. ex Willd.) Roem. & Schult. ME (T), VT (T)
ANMOM2 Anthoxanthum monticola (Bigelow) Veldkamp ssp. monticola alpine sweetgrass
ANMOO Anthoxanthum monticola (Bigelow) Veldkamp ssp. orthantha (T.J. Sřrensen) G. Tucker NY (E)
APCH Apacheria chiricahuensis C.T. Mason apachebush AZ (SR)
APPR Apios priceana B.L. Rob. traveler's delight T KY (E), TN (E)
APHY Aplectrum hyemale (Muhl. ex Willd.) Torr. Adam and Eve CT (SC), MA (E), NJ (E), NY (E), PA (R), VT (T)
APCA Apocynum cannabinum L. Indianhemp
APSI Apocynum sibiricum Jacq. MD (E, X)
AQCA Aquilegia canadensis L. red columbine FL (E)
AQCH Aquilegia chrysantha A. Gray golden columbine AZ (SR)
AQCOP Aquilegia coerulea James var. pinetorum (Tidestr.) Payson ex Kearney & Peebles Colorado blue columbine
AQCAP Aquilegia caerulea James var. pinetorum (Tidestr.) Payson ex Kearney & Peebles, orth. var. AZ (SR)
AQDE Aquilegia desertorum (M.E. Jones) Cockerell ex A. Heller desert columbine AZ (SR)
AQEL Aquilegia elegantula Greene western red columbine AZ (SR)
AQLO Aquilegia longissima A. Gray longspur columbine AZ (SR)
AQMI Aquilegia micrantha Eastw. Mancos columbine AZ (SR)
AQTR Aquilegia triternata Payson Chiricahua Mountain columbine AZ (SR)
ARCA Arabis canadensis L. sicklepod FL (E), NH (T)
ARCR Arabis crucisetosa Constance & Rollins wetsoil rockcress WA (S)
ARDI2 Arabis ×divaricarpa A. Nelson (pro sp.) [drummondii × holboellii] spreadingpod rockcress OH (E)
ARDR Arabis drummondii A. Gray Drummond's rockcress IN (E), NJ (E), NY (E), OH (E), RI (SC), VT (E)
ARGE Arabis georgiana Harper Georgia rockcress GA (T)
ARGL Arabis glabra (L.) Bernh. tower rockcress IN (T), TN (SC)
ARHI Arabis hirsuta (L.) Scop. hairy rockcress PA (E), TN (SC)
ARHIP Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins creamflower rockcress NH (E), OH (E)
ARHIA Arabis hirsuta (L.) Scop. var. adpressipilis (M. Hopkins) Rollins KY (E)
ARHO Arabis hoffmannii (Munz) Rollins Hoffmann's rockcress E
ARHOR Arabis holboellii Hornem. var. retrofracta (Graham) Rydb. second rockcress MN (T)
ARLA Arabis laevigata (Muhl. ex Willd.) Poir. smooth rockcress ME (T), MA (T)
ARLY2 Arabis lyrata L. lyrate rockcress OH (T), VT (T)
ARLY5 Arabidopsis lyrata (L.) O'Kane & Al-Shehbaz MA (E)
ARMA33 Arabis macdonaldiana Eastw. MacDonald rockcress E CA (E)
ARMI5 Arabis missouriensis Greene green rockcress KY (E), ME (T), MD (E), MA (T), NH (T), NY (T), PA (E), RI (SC)
ARMID Arabis missouriensis Greene var. deamii (M. Hopkins) M. Hopkins IN (E)
ARPA2 Arabis patens Sull. spreading rockcress IN (E), OH (E), TN (E)
ARPE3 Arabis perstellata E.L. Braun Nevada rockcress E KY (T), MI (T), TN (E)
ARSE9 Arabis serotina Steele shale barren rockcress E VA (E)
ARSH2 Arabis shortii (Fernald) Gleason Short's rockcress MD (T), NY (E), TN (SC)
ARHI2 Aralia hispida Vent. bristly sarsaparilla IN (E), MD (E), OH (E)
ARRA Aralia racemosa L. American spikenard RI (SC)
ARPU3 Arceuthobium pusillum Peck eastern dwarf mistletoe CT (E), NJ (E), PA (T), RI (E)
ARCA4 Arctomecon californica Torr. & Frém. California bearpoppy AZ (SR), NV (FP)
ARHU3 Arctomecon humilis Coville common bearpoppy E
ARAL2 Arctostaphylos alpina (L.) Spreng. alpine bearberry ME (T), NH (T)
ARBA4 Arctostaphylos bakeri Eastw. Baker's manzanita CA (R)
ARCO13 Arctostaphylos confertiflora Eastw. Santa Rosa Island manzanita E
ARDE2 Arctostaphylos densiflora M.S. Baker Vine Hill manzanita CA (E)
ARED Arctostaphylos edmundsii J.T. Howell Little Sur manzanita
AREDP Arctostaphylos edmundsii J.T. Howell var. parvifolia J.B. Roof CA (R)
ARGLC4 Arctostaphylos glandulosa Eastw. ssp. crassifolia (Jeps.) P.V. Wells Del Mar manzanita E
ARHOH Arctostaphylos hookeri G. Don ssp. hearstiorum (Hoover & J.B. Roof) P.V. Wells Hearst's manzanita CA (R)
ARHOR2 Arctostaphylos hookeri G. Don ssp. ravenii P.V. Wells Presidio manzanita E CA (E)
ARIM Arctostaphylos imbricata Eastw. San Bruno Mountain manzanita CA (E)
ARMO2 Arctostaphylos morroensis Wies. & Schreib. Morro manzanita T
ARMY Arctostaphylos myrtifolia Parry Ione manzanita T
ARPA19 Arctostaphylos pacifica J.B. Roof Pacific manzanita CA (E)
ARPA21 Arctostaphylos pallida Eastw. Alameda manzanita T CA (E)
ARUV Arctostaphylos uva-ursi (L.) Spreng. kinnikinnick IL (E), IN (R), IA (E), OH (PRX), PA (X)
ARLA4 Arenaria lanuginosa (Michx.) Rohrb. spreading sandwort TN (E)
ARPA7 Arenaria paludicola B.L. Rob. marsh sandwort E CA (E), WA (PX)
ARUR Arenaria ursina B.L. Rob. Bear Valley sandwort T
ARBU Arethusa bulbosa L. dragon's mouth CT (E), IN (X), MD (E, X), MA (T), NH (E), NY (T), NC (E), OH (E), PA (E), RI (E), VT (T)
ARPLP Argemone pleiacantha Greene ssp. pinnatisecta G.B. Ownbey southwestern pricklypoppy E NM (E)
ARAN7 Argentina anserina (L.) Rydb. silverweed cinquefoil
POAN5 Potentilla anserina L. IN (T), IA (T), PA (T)
AREGE Argentina egedii (Wormsk.) Rydb. ssp. egedii Pacific silverweed
POANE Potentilla anserina L. ssp. egedii (Wormsk.) Hiitonen NY (T)
ARGN2 Argusia gnaphalodes (L.) Heine sea rosemary FL (E)
ARKA2 Argyroxiphium kauense (Rock & Neal) O. Deg. & I. Deg. kau silversword E
ARSAM Argyroxiphium sandwicense DC. ssp. macrocephalum (A. Gray) Mérat Hawai'i silversword T
ARSAS Argyroxiphium sandwicense DC. ssp. sandwicense Hawai'i silversword E
ARBL2 Argythamnia blodgettii (Torr.) Chapm. Blodgett's silverbush FL (E)
ARDR3 Arisaema dracontium (L.) Schott green dragon MA (T), NH (E), NY (EV), VT (T)
ARBA2 Aristida basiramea Engelm. ex Vasey forked threeawn ME (SC)
ARCH4 Aristida chaseae Hitchc. Chase's threeawn E PR (E)
ARDI4 Aristida dichotoma Michx. churchmouse threeawn MI (PREX)
ARLA6 Aristida lanosa Muhl. ex Elliot woollysheath threeawn MD (E), NJ (E)
ARLO16 Aristida longespica Poir. slimspike threeawn RI (SC)
ARLO2 Aristida longispica Poir., orth. var. CT (SC), MI (T)
ARLOG6 Aristida longespica Poir. var. geniculata (Raf.) Fernald slimspike threeawn
ARIN8 Aristida intermedia Scribn. & C.R. Ball IN (R)
ARLOG Aristida longispica Poir. var. geniculata (Raf.) Fernald, orth. var. NH (E)
ARNE8 Aristida necopina Shinners OH (E)
ARPO3 Aristida portoricensis Pilg. pelos del diablo E PR (E)
ARPU8 Aristida purpurascens Poir. arrowfeather threeawn CT (SC), MA (T), PA (T), RI (T)
ARPUV Aristida purpurascens Poir. var. virgata (Trin.) Allred arrowfeather threeawn
ARVI5 Aristida virgata Trin. MD (E)
ARRA2 Aristida ramosissima Engelm. ex A. Gray s-curve threeawn KY (H), TN (PX, E)
ARTU Aristida tuberculosa Nutt. seaside threeawn CT (E), IN (R), MA (T), MI (T), NH (E)
ARMA7 Aristolochia macrophylla Lam. pipevine MD (T)
ARPE8 Aristolochia pentandra Jacq. Marsh's dutchman's pipe FL (E)
ARSE3 Aristolochia serpentaria L. Virginia snakeroot CT (T), IA (T), MI (T), NY (E)
ARSEH Aristolochia serpentaria L. var. hastata (Nutt.) Duch. IL (T)
ARTO3 Aristolochia tomentosa Sims woolly dutchman's pipe FL (E)
ARAC3 Arnica acaulis (Walter) Britton, Sterns & Poggenb. common leopardbane FL (E), MD (E), PA (E)
ARCO9 Arnica cordifolia Hook. heartleaf arnica MI (E)
ARLA7 Arnica lanceolata Nutt. lanceleaf arnica ME (T), NH (T), NY (E)
ARLO5 Arnica lonchophylla Greene longleaf arnica MN (T)
ARAL30 Arnoglossum album L.C. Anderson Bay County Indian plantain FL (E)
ARAT Arnoglossum atriplicifolium (L.) H. Rob. pale Indian plantain
CAAT Cacalia atriplicifolia L. NJ (E)
ARDI9 Arnoglossum diversifolium (Torr. & A. Gray) H. Rob. variableleaf Indian plantain FL (T), GA (T)
ARPL4 Arnoglossum plantagineum Raf. groovestem Indian plantain MN (T), TN (SC)
CATU10 Cacalia tuberosa Nutt. WI (T)
ARRE6 Arnoglossum reniforme (Hook.) H. Rob. great Indian plantain
CAMU23 Cacalia muehlenbergii (Sch. Bip.) Fernald MD (E, X)
ARCA12 Artemisia campestris L. field sagewort OH (T)
ARCAB2 Artemisia campestris L. ssp. borealis (Pall.) H.M. Hall & Clem. field sagewort ME (PX), MA (E), NY (E)
ARCAW Artemisia campestris L. ssp. borealis (Pall.) H.M. Hall & Clem. var. wormskioldii (Besser ex Hook.) Cronquist field sagewort OR (E), WA (E)
ARCAC Artemisia campestris L. ssp. caudata (Michx.) H.M. Hall & Clem. field sagewort NH (T), PA (E), RI (SC)
ARDR4 Artemisia dracunculus L. tarragon IL (E)
ARLU Artemisia ludoviciana Nutt. white sagebrush MI (T)
ASCA Asarum canadense L. Canadian wildginger ME (T)
ASAM Asclepias amplexicaulis Sm. clasping milkweed NH (T), RI (SC), VT (T)
ASCU8 Asclepias curtissii A. Gray Curtiss' milkweed FL (E)
ASEN Asclepias engelmanniana Woodson Engelmann's milkweed IA (E)
ASEX Asclepias exaltata L. poke milkweed RI (SC)
ASHI Asclepias hirtella (Pennell) Woodson green milkweed MI (T), MN (T), TN (SC)
ASLA3 Asclepias lanuginosa Nutt. sidecluster milkweed IL (E), IA (T), WI (T)
ASME Asclepias meadii Torr. ex A. Gray Mead's milkweed T IL (E), IN (RI), IA (E), MO (E)
ASOV Asclepias ovalifolia Decne. oval-leaf milkweed IL (E), MI (E), WI (T)
ASPU2 Asclepias purpurascens L. purple milkweed CT (SC), MA (E), RI (H), TN (SC), WI (E)
ASQU Asclepias quadrifolia Jacq. fourleaf milkweed NH (T), RI (T)
ASRU Asclepias rubra L. red milkweed MD (E), PA (X)
ASSP Asclepias speciosa Torr. showy milkweed IA (T)
ASST Asclepias stenophylla A. Gray slimleaf milkweed IL (E), IA (E), MN (E)
ASSU3 Asclepias sullivantii Engelm. ex A. Gray prairie milkweed MI (T), MN (T), WI (T)
ASTU Asclepias tuberosa L. butterfly milkweed ME (PX), NH (E), NY (EV), RI (SC), VT (T)
ASVA Asclepias variegata L. redring milkweed CT (E), NY (E), PA (E)
ASVE Asclepias verticillata L. whorled milkweed MA (T), RI (SC)
ASVI Asclepias viridiflora Raf. green comet milkweed CT (SC), FL (E), NY (T)
ASVI2 Asclepias viridis Walter green antelopehorn IN (E)
ASVI9 Asclepias viridula Chapm. southern milkweed FL (T)
ASWE3 Asclepias welshii N.H. Holmgren & P.K. Holmgren Welsh's milkweed T
ASTE11 Asimina tetramera Small fourpetal pawpaw E FL (E)
ASTR Asimina triloba (L.) Dunal pawpaw NJ (E), NY (T)
ASBR2 Asplenium bradleyi D.C. Eaton Bradley's spleenwort IL (E), IN (E), MD (E, X), NJ (E), NY (E), OH (T), PA (E)
ASER9 Asplenium erosum L. eared spleenwort
ASAU3 Asplenium auritum Sw. FL (E)
ASHE4 Asplenium ×heteroresiliens W.H. Wagner (pro sp.) [heterochroum × resiliens] GA (T), NC (E)
ASMO Asplenium monanthes L. singlesorus spleenwort FL (E), NC (E)
ASMO2 Asplenium montanum Willd. mountain spleenwort CT (T), IN (E), MA (E), MI (PREX), NY (T), RI (E), VT (T)
ASPI Asplenium pinnatifidum Nutt. lobed spleenwort MD (E), NJ (E), PA (R), WI (T)
ASPL Asplenium platyneuron (L.) Britton, Sterns & Poggenb. ebony spleenwort ME (SC), NY (EV)
ASPU10 Asplenium pumilum Sw. dwarf spleenwort FL (E)
ASRE Asplenium resiliens Kunze blackstem spleenwort IL (E), IN (E), MD (E), OH (PRX), PA (E)
ASRH2 Asplenium rhizophyllum L. walking fern ME (PX), MI (T), NY (EV), RI (E)
CARH8 Camptosorus rhizophyllus (L.) Link NH (E)
ASRH3 Asplenium rhomboideum Brack. diamond spleenwort
ASFRI Asplenium fragile C. Presl var. insulare Morton E
ASRU2 Asplenium ruta-muraria L. wallrue CT (T), IN (T), MA (T), MI (E), NY (EV), OH (T)
ASSCA Asplenium scolopendrium L. var. americanum (Fernald) Kartesz & Gandhi Hart's tonguefern T MI (E), NY (T), TN (E)
ASSE9 Asplenium serratum L. wild birdnest fern FL (E)
ASTR2 Asplenium trichomanes L. maidenhair spleenwort MN (T), NY (EV), RI (SC)
ASTR9 Asplenium trichomanes-dentatum L. toothed spleenwort
ASDE14 Asplenium dentatum L. FL (E)
ASTR10 Asplenium trichomanes-ramosum L. brightgreen spleenwort ME (T), MI (T), NY (E), VT (T)
ASVI10 Asplenium viride Huds. WI (E)
ASVE6 Asplenium verecundum Chapm. ex Underw. limestone spleenwort FL (E)
ASCR7 Astilbe crenatiloba (Britton) Small Roan Mountain false goat's beard TN (PX, E)
ASAG Astragalus agnicidus Barneby Humboldt County milkvetch CA (E)
ASAL4 Astragalus albens Greene cushenbury milkvetch E
ASAL7 Astragalus alpinus L. alpine milkvetch ME (SC), MN (E), WI (E)
ASAP Astragalus applegatei M. Peck Applegate's milkvetch E OR (E)
ASAR7 Astragalus arrectus A. Gray Palouse milkvetch WA (S)
ASAR8 Astragalus arthurii M.E. Jones waha milkvetch WA (S)
ASBI6 Astragalus bibullatus Barneby & Bridges limestone glade milkvetch E TN (E)
ASBR6 Astragalus brauntonii Parish Braunton's milkvetch E
ASCA11 Astragalus canadensis L. Canadian milkvetch MD (E), MI (T), VT (T)
ASCL6 Astragalus clarianus Jeps. Napa milkvetch E
ASCL Astragalus claranus Jeps., orth. var. CA (T)
ASCOM Astragalus cobrensis A. Gray var. maguirei Kearney Maguire's milkvetch AZ (SR)
ASCOL Astragalus collinus Douglas ex G. Don var. laurentii (Rydb.) Barneby Laurent's milkvetch OR (T)
ASCO9 Astragalus columbianus Barneby Columbian milkvetch WA (T)
ASCO13 Astragalus cottonii M.E. Jones Cotton's milkvetch
ASAUO Astragalus australis (L.) Lam. var. olympicus Isely WA (T)
ASCR2 Astragalus crassicarpus Nutt. groundplum milkvetch WI (E)
ASCRT Astragalus crassicarpus Nutt. var. trichocalyx (Nutt.) Barneby groundplum milkvetch IL (E)
ASCRC4 Astragalus cremnophylax Barneby var. cremnophylax sentry milkvetch E AZ (HS)
ASCRM Astragalus cremnophylax Barneby var. myriorrhaphis Barneby sentry milkvetch AZ (SR)
ASCUC2 Astragalus cusickii A. Gray var. cusickii Cusick's milkvetch WA (S)
ASCUS2 Astragalus cusickii A. Gray var. sterilis (Barneby) Barneby barren milkvetch OR (T)
ASDE2 Astragalus desereticus Barneby deseret milkvetch T
ASDI2 Astragalus diaphanus Douglas ex Hook. transparent milkvetch WA (PX)
ASDID4 Astragalus diaphanus Douglas ex Hook. var. diurnus (S. Watson) Barneby ex M. Peck OR (T)
ASDI4 Astragalus distortus Torr. & A. Gray Ozark milkvetch MD (T)
ASER4 Astragalus eremiticus Sheldon hermit milkvetch
ASAM14 Astragalus ampullarioides (S.L. Welsh) S.L. Welsh E
ASEU2 Astragalus eucosmus B.L. Rob. elegant milkvetch ME (PX)
ASGE Astragalus geyeri A. Gray Geyer's milkvetch WA (S)
ASGET Astragalus geyeri A. Gray var. triquetrus (A. Gray) M.E. Jones Geyer's milkvetch NV (FP)
ASHO5 Astragalus holmgreniorum Barneby Paradox milkvetch E AZ (HS)
ASHU Astragalus humillimus A. Gray Mancos milkvetch E NM (E)
ASHY3 Astragalus hypoxylus S. Watson Huachuca Mountain milkvetch AZ (SR)
ASJA Astragalus jaegerianus Munz Lane Mountain milkvetch E
ASJO Astragalus johannis-howellii Barneby Long Valley milkvetch CA (R)
ASKED2 Astragalus kentrophyta A. Gray var. douglasii Barneby Douglas' spiny milkvetch WA (PX)
ASLEC2 Astragalus lentiginosus Douglas ex Hook. var. coachellae Barneby ex Shreve & Wiggins Coachella milkvetch E
ASLEP3 Astragalus lentiginosus Douglas ex Hook. var. piscinensis Barneby Fish Slough milkvetch T
ASLES4 Astragalus lentiginosus Douglas ex Hook. var. sesquimetralis (Rydb.) Barneby Sodaville milkvetch CA (E), NV (FP)
ASLIM Astragalus limnocharis Barneby var. montii (S.L. Welsh) Isely Monti's milkvetch
ASMO11 Astragalus montii S.L. Welsh T
ASMAP Astragalus magdalenae Greene var. peirsonii (Munz & McBurney) Barneby Peirson's milkvetch T CA (E)
ASMI2 Astragalus michauxii (Kuntze) F.J. Herm. sandhills milkvetch NC (T)
ASMI4 Astragalus microcystis A. Gray dwarf milkvetch WA (S)
ASMIP Astragalus misellus S. Watson var. pauper Barneby pauper milkvetch WA (S)
ASMOH Astragalus mohavensis S. Watson var. hemigyrus (Clokey) Barneby Mojave milkvetch NV (FP)
ASMO9 Astragalus monoensis Barneby Mono milkvetch CA (R)
ASMU Astragalus mulfordiae M.E. Jones Mulford's milkvetch OR (E)
ASNE2 Astragalus neglectus (Torr. & A. Gray) Sheldon Cooper's milkvetch NY (E), OH (E), PA (E), WI (E)
ASNU7 Astragalus nutriosensis S.C. Sand. Apache milkvetch AZ (SR)
ASOS Astragalus osterhoutii M.E. Jones Kremmling milkvetch E
ASPE4 Astragalus peckii Piper Peck's milkvetch OR (T)
ASPH Astragalus phoenix Barneby Ash Meadows milkvetch T NV (FP)
ASPUS Astragalus pulsiferae A. Gray var. suksdorfii (Howell) Barneby Suksdorf's milkvetch WA (E)
ASPYL Astragalus pycnostachyus A. Gray var. lanosissimus (Rydb.) Munz & McBurney marsh milkvetch E
ASRI Astragalus riparius Barneby woodyroot milkvetch WA (S)
ASRO Astragalus robbinsii (Oakes) A. Gray Robbins' milkvetch ME (PX)
ASROJ Astragalus robbinsii (Oakes) A. Gray var. jesupii Eggl. & Sheldon Jesup's milkvetch E NH (E), VT (E)
ASSI5 Astragalus sinuatus Piper Whited's milkvetch WA (E)
ASTET Astragalus tener A. Gray var. titi (Eastw.) Barneby coastal dunes milkvetch E CA (E)
ASTE7 Astragalus tennesseensis A. Gray ex Chapm. Tennessee milkvetch IL (E), IN (RI), TN (SC)
ASTR4 Astragalus traskiae Eastw. Trask's milkvetch CA (R)
ASTR5 Astragalus tricarinatus A. Gray triplerib milkvetch E
ASTY Astragalus tyghensis M. Peck Tygh Valley milkvetch OR (T)
ASXI Astragalus xiphoides (Barneby) Barneby gladiator milkvetch AZ (SR)
ASYO Astragalus yoder-williamsii Barneby Osgood Mountain milkvetch NV (FP)
ASAS6 Astrophytum asterias (Zucc.) Lem. sanddollar E TX (E)
ATFI Athyrium filix-femina (L.) Roth common ladyfern FL (T), NY (EV)
ATFIA Athyrium filix-femina (L.) Roth ssp. angustum (Willd.) R.T. Clausen subarctic ladyfern TN (SC)
ATCON Atriplex coronata S. Watson var. notatior Jeps. crownscale E
ATGL Atriplex glabriuscula Edmondston Scotland orache CT (SC), NY (E), RI (SC)
ATHY Atriplex hymenelytra (Torr.) S. Watson desertholly AZ (SR)
ATSU2 Atriplex subspicata (Nutt.) Rydb. saline saltbush NJ (E), NY (E)
ATTU Atriplex tularensis Coville Tulare saltbush CA (E)
AUPA2 Auerodendron pauciflorum Alain turtlefat E PR (E)
AUGRP Aureolaria grandiflora (Benth.) Pennell var. pulchra Pennell largeflower yellow false foxglove IN (X)
AUPA Aureolaria patula (Chapm.) Pennell spreading yellow false foxglove KY (SC), TN (T)
AUPE2 Aureolaria pedicularia (L.) Raf. fernleaf yellow false foxglove IA (E), ME (SC), MN (T)
AUPEA Aureolaria pedicularia (L.) Raf. var. ambigens (Fernald) Farw. fernleaf yellow false foxglove OH (E)
AUPEI Aureolaria pedicularia (L.) Raf. var. intercedens Pennell fernleaf yellow false foxglove NH (E)
AUPEP Aureolaria pedicularia (L.) Raf. var. pedicularia fernleaf yellow false foxglove OH (E)
AUVI Aureolaria virginica (L.) Pennell downy yellow false foxglove NH (T)
AXFU Axonopus furcatus (Flueggé) Hitchc. big carpetgrass MD (E, X)
AYLI Ayenia limitaris Cristobal Rio Grande ayenia E TX (E)
AZCA Azolla caroliniana Willd. Carolina mosquitofern IN (T), NY (EV)
BADI3 Baccharis dioica Vahl broombush false willow FL (E)
BAHA Baccharis halimifolia L. eastern baccharis PA (R)
BAVA3 Baccharis vanessae R.M. Beauch. Encinitis false willow T CA (E)
BAIN2 Bacopa innominata (G. Maza) Alain tropical waterhyssop MD (E, X), VA (E)
BARO Bacopa rotundifolia (Michx.) Wettst. disk waterhyssop IN (E)
BAAT Balduina atropurpurea Harper purpledisk honeycombhead FL (E), GA (R)
BAVA2 Banara vanderbiltii Urb. Vanderbilt's palo de ramon E PR (E)
BAAR Baptisia arachnifera Duncan cobwebby wild indigo E GA (E)
BAAU Baptisia australis (L.) R. Br. blue wild indigo IN (T), MD (T), OH (E)
BAAUM Baptisia australis (L.) R. Br. var. minor (Lehm.) Fernald blue wild indigo KY (SC)
BAMI4 Baptisia minor Lehm. NC (T)
BABRL2 Baptisia bracteata Muhl. ex Elliot var. leucophaea (Nutt.) Kartesz & Gandhi longbract wild indigo KY (SC), TN (SC)
BALE3 Baptisia leucophaea Nutt. MI (E)
BACA4 Baptisia calycosa Canby Florida wild indigo FL (E)
BACAV Baptisia calycosa Canby var. villosa Canby Florida wild indigo
BAHI4 Baptisia hirsuta Small FL (T)
BAME Baptisia megacarpa Chapm. ex Torr. & A. Gray Apalachicola wild indigo FL (E)
BASI Baptisia simplicifolia Croom scareweed FL (T)
BATI Baptisia tinctoria (L.) R. Br. horseflyweed KY (T), ME (E)
BAOR Barbarea orthoceras Ledeb. American yellowrocket ME (PX), NH (E)
BAPA2 Bartonia paniculata (Michx.) Muhl. twining screwstem IL (E), ME (T), MI (T), NY (E)
BAVI3 Bartonia virginica (L.) Britton, Sterns & Poggenb. yellow screwstem KY (T), MN (E)
BACO2 Basiphyllaea corallicola (Small) Ames Carter's orchid FL (E)
BANU3 Bazzania nudicaulis A. Evans TN (T)
BESY Beckmannia syzigachne (Steud.) Fernald American sloughgrass IL (E), MI (T)
BECO5 Beloglottis costaricensis (Rchb. f.) Schltr. Costa Rican lady's tresses
SPCO6 Spiranthes costaricensis Rchb. f. FL (E)
BEOR Bensoniella oregana (Abrams & Bacig.) Morton Oregon bensoniella CA (R)
BECA2 Berberis canadensis Mill. American barberry IL (E), IN (E), KY (E), MD (E, X), PA (X), TN (SC)
BESC Berchemia scandens (Hill) K. Koch Alabama supplejack IL (E), KY (T)
BEER Berula erecta (Huds.) Coville cutleaf waterparsnip IA (T), MI (T)
BEBU Besseya bullii (Eaton) Rydb. Bull's coraldrops IL (T), IN (E), IA (T), MI (T), MN (T), OH (PRX), WI (T)
BEAL2 Betula alleghaniensis Britton yellow birch IL (E)
BEGL Betula glandulosa Michx. resin birch ME (E), NH (T), NY (E)
BEMI Betula minor (Tuck.) Fernald dwarf white birch ME (E), NY (E)
BENI Betula nigra L. river birch NH (T)
BEPAC2 Betula papyrifera Marsh. var. cordifolia (Regel) Fernald mountain paper birch TN (E)
BEPO Betula populifolia Marsh. gray birch IL (E), IN (X)
BEPU4 Betula pumila L. bog birch CT (SC), IA (T), ME (SC), MA (E), NH (E), NY (T), OH (T)
BEPUG Betula pumila L. var. glandulifera Regel bog birch VT (E)
BEUB Betula uber (Ashe) Fernald Virginia roundleaf birch T VA (E)
BIBE2 Bidens beckii Torr. ex Spreng. Beck's water-marigold IL (E), IN (E), NJ (E)
MEBE2 Megalodonta beckii (Torr. ex Spreng.) Greene CT (T), IA (E), OH (PRX), PA (E)
MEBEB Megalodonta beckii (Torr. ex Spreng.) Greene var. beckii NY (T)
BIBI3 Bidens bidentoides (Nutt.) Britton Delmarva beggarticks NY (R), PA (E)
BICO5 Bidens connata Muhl. ex Willd. purplestem beggarticks RI (SC)
BICO Bidens coronata (L.) Britton crowned beggarticks RI (SC)
BIDI Bidens discoidea (Torr. & A. Gray) Britton small beggarticks NH (E)
BIEA Bidens eatonii Fernald Eaton's beggarticks CT (SC), ME (T), MA (E), NJ (E)
BIHY Bidens hyperborea Greene estuary beggarticks ME (SC), NY (E)
BIHYH Bidens hyperborea Greene var. hyperborea estuary beggarticks
BIHYC2 Bidens hyperborea Greene var. colpophila (Fernald & H. St. John) Fernald MA (E)
BILA Bidens laevis (L.) Britton, Sterns & Poggenb. smooth beggartick NY (T)
BIMIK2 Bidens micrantha Gaudich. ssp. kalealaha Nagata & Ganders Kalealaha beggarticks E
BIMI Bidens mitis (Michx.) Sherff smallfruit beggarticks MD (E)
BIWI Bidens wiebkei Sherff Wiebke's beggarticks E
BINU2 Bigelowia nuttallii L.C. Anderson Nuttall's rayless goldenrod FL (E)
BLOC Blechnum occidentale L. hammock fern FL (E)
BLBA Blennosperma bakeri Heiser Baker's stickyseed E CA (E)
BLNAR Blennosperma nanum (Hook.) S.F. Blake var. robustum J.T. Howell common stickyseed CA (R)
BLCI Blephilia ciliata (L.) Benth. downy pagoda-plant CT (SC), IA (T), MA (E), NY (E)
BLHI Blephilia hirsuta (Pursh) Benth. hairy pagoda-plant CT (SC), MA (E), VT (T)
BLPU Bletia purpurea (Lam.) DC. pinepink FL (T)
BLHU Bloomeria humilis Hoover dwarf goldenstar CA (R)
BOOR Bolandra oregana S. Watson northern false coolwort WA (S)
BOAS Boltonia asteroides (L.) L'Hér. white doll's daisy MD (E), PA (E)
BODE2 Boltonia decurrens (Torr. & A. Gray) Alph. Wood claspingleaf doll's daisy T IL (T), MO (E)
BOGR5 Bonamia grandiflora (A. Gray) Hallier f. Florida lady's nightcap T FL (E)
BOME2 Bonamia menziesii A. Gray Hawai'i lady's nightcap E
BOFR Borrichia frutescens (L.) DC. bushy seaside tansy MD (E, X)
BOAC2 Botrychium acuminatum W.H. Wagner tailed grapefern MI (E)
BOAS2 Botrychium ascendens W.H. Wagner trianglelobe moonwort WA (S)
BOBI Botrychium biternatum (Sav.) Underw. sparselobe grapefern IL (T), OH (T)
BOCA5 Botrychium campestre W.H. Wagner & Farrar Iowa moonwort MI (T), NY (E), WA (S)
BOCR Botrychium crenulatum W.H. Wagner scalloped moonwort WA (S)
BODI2 Botrychium dissectum Spreng. cutleaf grapefern NY (EV)
BOGA2 Botrychium gallicomontanum Farrar & Johnson-Groh Frenchman's Bluff grapefern MN (E)
BOHE5 Botrychium hesperium (Maxon & R.T. Clausen) W.H. Wagner & Lellinger western moonwort MI (T), WA (S)
BOJE Botrychium jenmanii Underw. Dixie grapefern TN (T)
BOLA Botrychium lanceolatum (S.G. Gmel.) Angstr. lanceleaf grapefern MD (E, X), MN (T), NY (EV), OH (PRX)
BOLAA2 Botrychium lanceolatum (S.G. Gmel.) Angstr. var. angustisegmentum Pease & A.H. Moore lanceleaf grapefern
BOLAA Botrychium lanceolatum (S.G. Gmel.) Angstr. ssp. angustisegmentum (Pease & A.H. Moore) R.T. Clausen RI (SC)
BOLI7 Botrychium lineare W.H. Wagner narrowleaf grapefern WA (S)
BOLU Botrychium lunaria (L.) Sw. common moonwort ME (E), MN (T), NY (E), VT (E), WA (S), WI (E)
BOMA2 Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex W.D.J. Koch matricary grapefern IL (E), IN (T), IA (E), KY (E), NY (EV), RI (SC), TN (SC)
BOMI Botrychium minganense Victorin Mingan moonwort NY (E)
BOMO2 Botrychium mormo W.H. Wagner little goblin moonwort MI (T), WI (E)
BOMU Botrychium multifidum (S.G. Gmel.) Trevis. leathery grapefern IL (E), IA (T), MD (E, X), NJ (E), NY (EV), OH (T)
BOMUI Botrychium multifidum (S.G. Gmel.) Trevis. var. intermedium (D.C. Eaton) Farw. IN (X)
BOON Botrychium oneidense (Gilbert) House bluntlobe grapefern KY (E), MD (E), MN (E), NY (E), TN (SC)
BOPA12 Botrychium pallidum W.H. Wagner pale botrychium MN (E)
BOPA9 Botrychium paradoxum W.H. Wagner peculiar moonwort WA (S)
BOPE4 Botrychium pedunculosum W.H. Wagner stalked moonwort WA (S)
BOPU2 Botrychium pumicola Coville ex Underw. Crater Lake grapefern OR (T)
BORU Botrychium rugulosum W.H. Wagner ternate grapefern MN (T), NY (E)
BOSI Botrychium simplex E. Hitchc. little grapefern CT (SC), IL (E), IN (E), IA (T), MD (E, X), NY (EV), OH (E), RI (SC), WA (S)
BOVI Botrychium virginianum (L.) Sw. rattlesnake fern NY (EV)
BOCA4 Bourreria cassinifolia (A. Rich.) Griseb. smooth strongbark FL (E)
BORA2 Bourreria radula (Poir.) G. Don rough strongbark FL (E)
BOSU2 Bourreria succulenta Jacq. bodywood FL (E)
BOCU Bouteloua curtipendula (Michx.) Torr. sideoats grama CT (E), KY (SC), MI (T), NJ (E), NY (E), PA (T)
BOGR2 Bouteloua gracilis (Willd. ex Kunth) Lag. ex Griffiths blue grama IL (E)
BOHI2 Bouteloua hirsuta Lag. hairy grama AR (E)
BORI Bouteloua rigidiseta (Steud.) Hitchc. Texas grama AR (E)
BOAC Boykinia aconitifolia Nutt. Allegheny brookfoam KY (T)
BRTR4 Brachydontium trichodes (F. Weber) Milde brachydontium moss TN (E)
BRAR9 Brachyelytrum aristosum (Michx.) Trel. northern shorthusk
BRERS Brachyelytrum erectum (Schreb. ex Spreng.) P. Beauv. var. septentrionale Babel TN (SC)
BRPO4 Brachythecium populeum (Hedw.) Schimp. brachythecium moss KY (E)
BRCA7 Brassia caudata (L.) Lindl. cricket orchid FL (E)
BRCO8 Brickellia cordifolia Elliot Flyr's nemesis FL (E)
BREUE Brickellia eupatorioides (L.) Shinners var. eupatorioides false boneset
KUEU Kuhnia eupatorioides L. NJ (E)
BREUF Brickellia eupatorioides (L.) Shinners var. floridana (R.W. Long) B.L. Turner false boneset
BRMO3 Brickellia mosieri (Small) Shinners FL (E)
BRIN4 Brighamia insignis A. Gray cabbage on a stick E
BRRO Brighamia rockii H. St. John Molokai ohaha E
BRCOR2 Brodiaea coronaria (Salisb.) Engl. ssp. rosea (Greene) Niehaus Indian Valley brodiaea CA (E)
BRFI Brodiaea filifolia S. Watson threadleaf brodiaea T CA (E)
BRIN5 Brodiaea insignis (Jeps.) Niehaus Kaweah brodiaea CA (E)
BRPA2 Brodiaea pallida Hoover Chinese Camp brodiaea T CA (E)
BRCI2 Bromus ciliatus L. fringed brome MD (E, X)
BRINP5 Bromus inermis Leyss. ssp. pumpellianus (Scribn.) Wagnon var. pumpellianus (Scribn.) C.L. Hitchc. Pumpelly's brome
BRPU3 Bromus pumpellianus Scribn. MI (T)
BRKA2 Bromus kalmii A. Gray arctic brome ME (PX), MD (E), NH (E)
BRLA4 Bromus latiglumis (Shear) Hitchc. earlyleaf brome MD (E)
BRNO Bromus nottowayanus Fernald Nottoway Valley brome MD (E, X)
BRPU6 Bromus pubescens Muhl. ex Willd. hairy woodland brome ME (PX), NH (T)
BRVI6 Bryocrumia vivicolor (Dix.) W.R. Buck bryocrumia moss
BRAN8 Bryocrumia andersonii (E.B. Bartram) L.E. Anderson NC (E)
BRCY70 Bryum cyclophyllum (Schwägr.) Bruch & Schimp. bryum moss KY (E)
BRMI11 Bryum miniatum Lesq. glossy red bryum moss KY (E)
BUAM Buchnera americana L. American bluehearts IN (E), MD (E, X), MI (PREX), NY (E), OH (T), PA (X)
BUDI Buckleya distichophylla (Nutt.) Torr. piratebush NC (E), TN (T), VA (E)
BUNI2 Buellia nigra (Fink) Sheard black disc lichen MN (E)
BUPA2 Bulbophyllum pachyrachis (A. Rich.) Griseb. rat-tail orchid FL (E)
BUCIC Bulbostylis ciliatifolia (Elliot) Fernald var. coarctata (Elliot) Kral capillary hairsedge TN (PX, E)
BUFL2 Burmannia flava Mart. Fahkahatchee bluethread FL (E)
BUFA Bursera fagaroides (Kunth) Engl. fragrant bursera AZ (SR)
BUMI6 Buxbaumia minakatae Okam. buxbaumia moss OH (E)
BUVA Buxus vahlii Baill. Vahl's box E PR (E)
BYLU Byrsonima lucida (Mill.) DC. Long Key locustberry FL (T)
CACA Cabomba caroliniana A. Gray Carolina fanwort IN (X), KY (T)
CAKA5 Caesalpinia kavaiensis H. Mann uhiuhi E
CAMA21 Caesalpinia major (Medik.) Dandy & Exell Hawai'i pearls FL (E)
CAPA34 Caesalpinia pauciflora (Griseb.) C. Wright ex Sauvalle fewflower holdback FL (E)
CAED Cakile edentula (Bigelow) Hook. American searocket IL (T), PA (R)
CACA2 Calamagrostis cainii Hitchc. Cain's reedgrass NC (E), TN (E)
CACAM Calamagrostis canadensis (Michx.) P. Beauv. var. macouniana (Vasey) Stebbins Macoun's reedgrass KY (E)
CACO71 Calamagrostis coarctata (Torr.) Eaton arctic reedgrass
CACI Calamagrostis cinnoides W. Bartram, nom. illeg. ME (SC)
CAFO Calamagrostis foliosa Kearney leafy reedgrass CA (R)
CAPE10 Calamagrostis perplexa Scribn. wood reedgrass NY (E)
CAPI Calamagrostis pickeringii A. Gray Pickering's reedgrass ME (T), MA (E), NH (T), NJ (E)
CAPO3 Calamagrostis porteri A. Gray Porter's reedgrass MD (E), TN (E)
CAPOI Calamagrostis porteri A. Gray ssp. insperata (Swallen) C.W. Greene Porter's reedgrass AR (E), IN (T), KY (E), OH (E)
CAIN16 Calamagrostis insperata Swallen IL (E)
CAPOP Calamagrostis porteri A. Gray ssp. porteri Porter's reedgrass KY (T), NY (E)
CAST36 Calamagrostis stricta (Timm) Koeler slimstem reedgrass MI (T)
CASTI3 Calamagrostis stricta (Timm) Koeler ssp. inexpansa (A. Gray) C.W. Greene northern reedgrass CT (SC), ME (E), NH (E), NY (T), VT (E)
CALA47 Calamagrostis lacustris (Kearney) Nash MI (T), NH (T)
CASTS5 Calamagrostis stricta (Timm) Koeler ssp. stricta slimstem reedgrass ME (T), NY (E)
CAAR12 Calamovilfa arcuata K.E. Rogers Cumberland sandreed TN (E)
CACU Calamovilfa curtissii (Vasey) Scribn. Florida sandreed FL (T)
CALOM Calamovilfa longifolia (Hook.) Scribn. var. magna Scribn. & Merr. prairie sandreed WI (T)
CAPA Calla palustris L. water arum IL (E), IN (E), MD (E)
CAAM2 Callicarpa americana L. American beautyberry MD (E, X)
CAAM14 Callicarpa ampla Schauer caparosa E PR (E)
CAAL Callirhoe alcaeoides (Michx.) A. Gray light poppymallow IA (T), KY (H)
CAPA2 Callirhoe papaver (Cav.) A. Gray woodland poppymallow FL (E)
CASC4 Callirhoe scabriuscula B.L. Rob. Texas poppymallow E TX (E)
CATR Callirhoe triangulata (Leavenworth) A. Gray clustered poppymallow IN (X), IA (E)
CAHE2 Callitriche hermaphroditica L. northern water-starwort NY (E)
CAHE3 Callitriche heterophylla Pursh twoheaded water-starwort MI (T), WI (T)
CAPA52 Callitriche palustris L. vernal water-starwort
CAVE2 Callitriche verna L. OH (T)
CATE19 Callitriche terrestris Raf. terrestrial water-starwort NY (T)
CADE27 Calocedrus decurrens (Torr.) Florin incense cedar NV (CY)
CAAM4 Calochortus ambiguus (M.E. Jones) Ownbey doubting mariposa lily AZ (SR)
CAAU8 Calochortus aureus S. Watson golden mariposa lily AZ (SR)
CACO41 Calochortus coxii M. Godfrey & F. Callahan Cox's mariposa lily OR (E)
CADU Calochortus dunnii Purdy Dunn's mariposa lily CA (R)
CAFL Calochortus flexuosus S. Watson winding mariposa lily AZ (SR)
CAGU Calochortus gunnisonii S. Watson Gunnison's mariposa lily AZ (SR)
CAHO11 Calochortus howellii S. Watson Howell's mariposa lily OR (T)
CAIN18 Calochortus indecorus Ownbey & M. Peck Sexton Mountain mariposa lily OR (E)
CAKEK2 Calochortus kennedyi Porter var. kennedyi desert mariposa lily AZ (SR)
CAKEM Calochortus kennedyi Porter var. munzii Jeps. desert mariposa lily AZ (SR)
CALOL Calochortus longebarbatus S. Watson var. longebarbatus longbeard mariposa lily WA (S)
CAMAM Calochortus macrocarpus Douglas var. maculosus (A. Nelson & J.F. Macbr.) A. Nelson & J.F. Macbr. Nez Perce mariposa lily WA (S)
CANI Calochortus nitidus Douglas broadfruit mariposa lily WA (T)
CAPE Calochortus persistens Ownbey Siskiyou mariposa lily CA (R)
CATI3 Calochortus tiburonensis A.J. Hill Tiburon mariposa lily T CA (T)
CAUM5 Calochortus umpquaensis N.A. Fredricks Umpqua mariposa lily OR (E)
CAPA77 Caloplaca parvula Wetmore MN (E)
CAMU10 Calopogon multiflorus Lindl. manyflower grasspink FL (E), NC (E)
CATU5 Calopogon tuberosus (L.) Britton, Sterns & Poggenb. tuberous grasspink IL (E), KY (E), MD (E), NY (EV), RI (SC)
CANA Caltha natans Pall. ex Georgi floating marsh marigold MN (E), WI (E)
CAPA5 Caltha palustris L. yellow marsh marigold TN (E)
CAFL22 Calycanthus floridus L. eastern sweetshrub FL (E)
CAFLG Calycanthus floridus L. var. glaucus (Willd.) Torr. & A. Gray eastern sweetshrub KY (T)
CAFE5 Calycanthus fertilis Walter OH (PRX)
CALY2 Calycocarpum lyonii (Pursh) A. Gray cupseed IN (T)
CACO72 Calydorea coelestina (Bartram) Goldblatt & Henrich Bartram's ixia
SPCO5 Sphenostigma coelestinum (Bartram) R.C. Foster FL (E)
CASE12 Calylophus serrulatus (Nutt.) P.H. Raven yellow sundrops KY (H)
CABU Calypso bulbosa (L.) Oakes fairy slipper MI (T), NH (E), NY (E), VT (T), WI (T)
CABUA Calypso bulbosa (L.) Oakes var. americana (R. Br.) Luer fairy slipper AZ (SR)
CAPA8 Calyptranthes pallens Griseb. pale lidflower FL (T)
CATH3 Calyptranthes thomasiana Berg Thomas' lidflower E PR (E)
CAZU Calyptranthes zuzygium (L.) Sw. myrtle of the river FL (E)
CARI3 Calyptronoma rivalis (O.F. Cook) L.H. Bailey Puerto Rico manac T
CACA101 Calystegia catesbeiana Pursh Catesby's false bindweed FL (E)
CASEE Calystegia sepium (L.) R. Br. ssp. erratica Brummitt hedge false bindweed NJ (E)
CASP14 Calystegia spithamaea (L.) Pursh low false bindweed CT (SC), ME (T), MA (E), NJ (E), VT (T)
CASPS2 Calystegia spithamaea (L.) Pursh ssp. spithamaea low false bindweed
COSP6 Convolvulus spithamaeus L. NH (T)
CAST21 Calystegia stebbinsii Brummitt Stebbins' false bindweed E CA (E)
CAAN2 Camassia angusta (Engelm. & A. Gray) Blank. prairie camas IL (E), IN (E)
CASC5 Camassia scilloides (Raf.) Cory Atlantic camas MI (T), NC (T), PA (E), WI (E)
CABE7 Camissonia benitensis P.H. Raven San Benito suncup T
CAEX10 Camissonia exilis (P.H. Raven) P.H. Raven Cottonwood Springs suncup AZ (SR)
CAPY5 Camissonia pygmaea (Douglas ex Lehm.) P.H. Raven dwarf suncup WA (T)
CASC18 Camissonia scapoidea (Nutt. ex Torr. & A. Gray) P.H. Raven Paiute suncup WA (S)
CAAP2 Campanula aparinoides Pursh marsh bellflower TN (T)
CADI3 Campanula divaricata Michx. small bonny bellflower MD (E, X)
CALA7 Campanula lasiocarpa Cham. mountain harebell WA (S)
CARO15 Campanula robinsiae Small Robins' bellflower E FL (E)
CARO2 Campanula rotundifolia L. bluebell bellflower NY (EV), OH (E)
CAFI10 Campylocentrum filiforme (Sw.) Cogn. ex Kuntze needleroot bentspur orchid
HAFI Harrisella filiformis (Sw.) Cogn. FL (T)
CAPA32 Campylocentrum pachyrrhizum (Rchb. f.) Rolfe leafless bentspur orchid FL (E)
CAAN9 Campyloneurum angustifolium (Sw.) Fée narrow strapfern FL (E)
CACO20 Campyloneurum costatum (Kunze) C. Presl tailed strapfern FL (E)
CALA28 Campyloneurum latum T. Moore birdwing fern FL (E)
CASA30 Campylostelium saxicola (F. Weber & D. Mohr) Bruch & Schimp. campylostelium moss OH (E)
CAMO32 Canadanthus modestus (Lindl.) G.L. Nesom giant mountain aster
ASMO3 Aster modestus Lindl. MI (T)
CAMO15 Canavalia molokaiensis O. Deg., I. Deg. & Sauer Molokai jackbean E
CAWI Canella winterana (L.) Gaertn. wild cinnamon FL (E)
CATE22 Canoparmelia texana (Tuck.) Elix & Hale Texan canoparmelia lichen OH (E)
CABE Cardamine bellidifolia L. alpine bittercress ME (E), NH (E)
CABU3 Cardamine bulbosa (Schreb. ex Muhl.) Britton, Sterns & Poggenb. bulbous bittercress NH (E)
CACL2 Cardamine clematitis Shuttlw. ex A. Gray small mountain bittercress TN (T)
CACO26 Cardamine concatenata (Michx.) Sw. cutleaf toothwort ME (E)
DELA5 Dentaria laciniata Muhl. ex Willd. NH (E)
CADI28 Cardamine dissecta (Leavenworth) Al-Shehbaz forkleaf toothwort
DEMU3 Dentaria multifida Muhl. ex Elliot IN (E)
CADO Cardamine douglassii Britton limestone bittercress CT (SC), MA (E)
CAFL13 Cardamine flagellifera O.E. Schulz Blue Ridge bittercress TN (T)
CALO11 Cardamine longii Fernald Long's bittercress CT (SC), ME (T), MD (E), MA (E), NH (T), NJ (E), NY (T)
CAMA36 Cardamine maxima (Nutt.) Alph. Wood large toothwort ME (PX), NJ (E)
DEMA Dentaria maxima Nutt. MI (T)
CAMI19 Cardamine micranthera Rollins streambank bittercress E NC (E)
CAPRP Cardamine pratensis L. var. pratensis cuckoo flower
CAPRP2 Cardamine pratensis L. var. palustris Wimm. & Grab. IL (E), MA (T), NH (E), OH (E)
CARO3 Cardamine rotundifolia Michx. American bittercress NJ (E), NY (E), TN (SC)
CAAB5 Carex abscondita Mack. thicket sedge NY (T)
CAAD2 Carex adusta Boott lesser brown sedge ME (E), PA (X)
CAAE3 Carex ×aestivaliformis Mack. [aestivalis × gracillima] TN (E)
CAAE2 Carex aestivalis M.A. Curtis ex A. Gray summer sedge CT (SC), KY (E), MD (E)
CAAG2 Carex aggregata Mack. glomerate sedge NY (E)
CAAL3 Carex alata Torr. broadwing sedge CT (E), IL (E), KY (T), PA (T), RI (SC)
CAAL25 Carex albicans Willd. ex Spreng. whitetinge sedge RI (SC)
CAALA2 Carex albicans Willd. ex Spreng. var. australis (L.H. Bailey) J. Rettig stellate sedge
CAPH4 Carex physorhyncha Liebm. ex Steud. IL (E)
CAAL4 Carex albida L.H. Bailey white sedge E CA (E)
CAAL5 Carex albolutescens Schwein. greenwhite sedge MI (T), OH (T)
CAAL11 Carex albursina Sheldon white bear sedge NJ (E)
CAAL8 Carex alopecoidea Tuck. foxtail sedge CT (SC), IN (E), ME (PX), MA (T), NJ (E), OH (E), TN (PX, E)
CAAM8 Carex amphibola Steud. eastern narrowleaf sedge NJ (E), NY (E)
CAAN10 Carex anthoxanthea J. Presl & C. Presl grassyslope arctic sedge WA (S)
CAAP5 Carex appalachica J. Webber & P.W. Ball Appalachian sedge KY (T)
CAAQ Carex aquatilis Wahlenb. water sedge NJ (E), PA (T)
CAAQA Carex aquatilis Wahlenb. var. aquatilis water sedge
CAAQA5 Carex aquatilis Wahlenb. var. altior (Rydb.) Fernald CT (SC)
CAAR2 Carex arcta Boott northern cluster sedge NY (E), VT (E)
CAAR3 Carex arctata Boott ex Hook. drooping woodland sedge IN (E), NJ (E), OH (E)
CAAR4 Carex argyrantha Tuck. hay sedge TN (T)
CAAR5 Carex arkansana (L.H. Bailey) L.H. Bailey Arkansas sedge IL (E)
CAAS2 Carex assiniboinensis W. Boott Assiniboia sedge MI (T)
CAAT2 Carex atherodes Spreng. wheat sedge IN (E), ME (E), NY (E), PA (E)
CAATA2 Carex atlantica L.H. Bailey ssp. atlantica prickly bog sedge IN (T)
CAATC Carex atlantica L.H. Bailey ssp. capillacea (L.H. Bailey) Reznicek prickly bog sedge IN (E), KY (E)
CAAT6 Carex atratiformis Britton scrabrous black sedge ME (SC), MI (T), NY (E), VT (T)
CAAT8 Carex atrosquama Mack. lesser blackscale sedge WA (S)
CAAU3 Carex aurea Nutt. golden sedge IL (E), IN (R), NH (T), PA (E)
CAAU7 Carex austrocaroliniana L.H. Bailey tarheel sedge KY (SC)
CABA3 Carex backii Boott Back's sedge CT (E), ME (E), MA (E), NJ (E), NY (T), PA (X)
CABA7 Carex baileyi Britton Bailey's sedge CT (SC), ME (SC), MA (E), NH (T)
CABA8 Carex baltzellii Chapm. ex Dewey Baltzell's sedge FL (T), GA (E)
CABA9 Carex barrattii Schwein. & Torr. Barratt's sedge CT (E), NY (E), NC (E), PA (X), TN (E)
CABE2 Carex bebbii Olney ex Fernald Bebb's sedge IN (T), NH (T), PA (E)
CABI3 Carex bicknellii Britton Bicknell's sedge ME (PX), NY (T), OH (T), PA (E)
CABI5 Carex bigelowii Torr. ex Schwein. Bigelow's sedge ME (SC), NY (T)
CABI9 Carex biltmoreana Mack. stiff sedge GA (T)
CABRM2 Carex bromoides Schkuhr ex Willd. ssp. montana Naczi brome-like sedge
CABRM Carex bromoides Schkuhr ex Willd. var. montana Naczi TN (T)
CABR15 Carex brunnescens (Pers.) Poir. brownish sedge IL (E), IN (E), NJ (E), OH (T)
CABU7 Carex bullata Schkuhr ex Willd. button sedge NH (E), NY (E), PA (E)
CABU5 Carex bushii Mack. Bush's sedge CT (SC), IN (E), ME (PX), MA (E), NJ (E), OH (E)
CABU6 Carex buxbaumii Wahlenb. Buxbaum's sedge CT (E), KY (H), MD (T), NH (E), NY (T), PA (R), RI (SC), TN (SC), VT (E), WA (S)
CACAD2 Carex canescens L. ssp. disjuncta (Fernald) Toivonen silvery sedge
CACAD Carex canescens L. var. disjuncta Fernald IL (E)
CACA12 Carex capillaris L. hair-like sedge ME (T), NH (T), NY (E), VT (T), WA (S)
CACAA2 Carex capitata L. ssp. arctogena (Harry Sm.) Hiitonen capitate sedge NH (T)
CACA14 Carex careyana Torr. ex Dewey Carey's sedge MD (E), MN (T), PA (E), WI (T)
CACA15 Carex caroliniana Schwein. Carolina sedge NY (E)
CACA16 Carex castanea Wahlenb. chestnut sedge CT (E), MA (E), NH (E)
CACE2 Carex cephaloidea (Dewey) Dewey thinleaf sedge OH (E)
CASPC Carex sparganioides Muhl. ex Willd. var. cephaloidea (Dewey) Carey IN (T)
CACH9 Carex chapmanii Steud. Chapman's sedge FL (T), TN (T)
CACH5 Carex chordorrhiza Ehrh. ex L. f. creeping sedge IL (E), IN (E), IA (E), MA (E), NY (T), PA (X), VT (E), WA (S)
CACI5 Carex circinata C.A. Mey. coiled sedge WA (S)
CACO21 Carex collinsii Nutt. Collins' sedge CT (SC), NY (E), PA (T), RI (H)
CACO7 Carex communis L.H. Bailey fibrousroot sedge IL (T)
CACO8 Carex comosa Boott longhair sedge KY (H), TN (T), WA (S)
CACO10 Carex concinna R. Br. low northern sedge WI (T)
CACO13 Carex conjuncta Boott soft fox sedge MD (E), MI (T), MN (T), NY (E)
CACO14 Carex conoidea Schkuhr ex Willd. openfield sedge IN (E), MD (E), NC (T), OH (T)
CAKA Carex katahdinensis Fernald MN (T)
CACR3 Carex crawei Dewey Crawe's sedge CT (T), IN (T), KY (SC), ME (E), NJ (E), NY (T)
CACR4 Carex crawfordii Fernald Crawford's sedge CT (SC), IL (E), PA (E)
CACR5 Carex crebriflora Wiegand coastal plain sedge KY (T)
CACRB Carex crinita Lam. var. brevicrinis Fernald fringed sedge PA (E)
CACR8 Carex crus-corvi Shuttlw. ex Kunze ravenfoot sedge MI (T), OH (T), WI (E)
CACR9 Carex cryptolepis Mack. northeastern sedge IL (E), PA (E)
CACU3 Carex cumulata (L.H. Bailey) Fernald clustered sedge CT (E), IN (E), NH (T), NJ (E), NY (T), RI (SC)
CADA3 Carex dasycarpa Muhl. sandywoods sedge GA (R)
CADA Carex davisii Schwein. & Torr. Davis' sedge CT (E), MD (E, X), MA (E), MN (T), NY (T), TN (SC)
CADER Carex debilis Michx. var. rudgei L.H. Bailey white edge sedge IN (T)
CADE6 Carex decomposita Muhl. cypressknee sedge IL (E), IN (T), KY (T), MD (E, X), MI (PREX), NY (E), OH (E)
CADE8 Carex densa (L.H. Bailey) L.H. Bailey dense sedge WA (S)
CADE9 Carex deweyana Schwein. Dewey sedge NJ (E), OH (PRX)
CADI4 Carex diandra Schrank lesser panicled sedge MD (E), NH (E), PA (T)
CADI6 Carex disperma Dewey softleaf sedge IL (E), IN (E), OH (E), PA (R)
CADU6 Carex duriuscula C.A. Mey. needleleaf sedge
CAEL2 Carex eleocharis L.H. Bailey WA (S)
CAEB2 Carex eburnea Boott bristleleaf sedge IN (R), ME (E), MD (E), NH (E), PA (E)
CAEC Carex echinata Murray star sedge IL (E), IN (E), OH (E)
CAECE Carex echinata Murray ssp. echinata star sedge TN (SC)
CAEM2 Carex emoryi Dewey Emory's sedge NY (E)
CAEX7 Carex exilis Dewey coastal sedge CT (E), MD (E), NH (T), NC (T), RI (SC), WI (T)
CAFE3 Carex festucacea Schkuhr ex Willd. fescue sedge MN (T)
CAFL4 Carex flava L. yellow sedge IN (T), PA (T), WA (S)
CAFO6 Carex folliculata L. northern long sedge IN (T)
CAFO4 Carex formosa Dewey handsome sedge CT (T), MA (T), MN (E), NJ (E), NY (T), OH (PRX), PA (E), WI (T)
CAFR3 Carex frankii Kunth Frank's sedge NY (E)
CAGA3 Carex garberi Fernald elk sedge IL (E), IN (T), ME (SC), MN (T), NY (E), OH (E), PA (E), VT (T), WI (T)
CAGAB2 Carex garberi Fernald var. bifaria Fernald NH (E)
CAGE2 Carex geyeri Boott Geyer's sedge PA (E)
CAGI4 Carex gigantea Rudge giant sedge IL (E), IN (E), KY (T)
CAGL5 Carex glaucescens Elliot southern waxy sedge MD (E)
CAGL6 Carex glaucodea Tuck. ex Olney blue sedge MA (E)
CAFLG5 Carex flaccosperma Dewey var. glaucodea (Tuck. ex Olney) Kük. NH (E), NY (E)
CAGR8 Carex gracilescens Steud. slender looseflower sedge MA (E)
CAGR3 Carex granularis Muhl. ex Willd. limestone meadow sedge
CAGRH Carex granularis Muhl. ex Willd. var. haleana (Olney) Porter NH (E)
CAGR4 Carex gravida L.H. Bailey heavy sedge IN (E), MI (PREX), TN (SC)
CAGR5 Carex grayi Carey Gray's sedge MA (T)
CAGR24 Carex grisea Wahlenb. inflated narrow-leaf sedge ME (SC)
CAGY2 Carex gynocrates Wormsk. ex Drejer northern bog sedge ME (SC), NY (E)
CADIG Carex dioica L. ssp. gynocrates (Wormsk. ex Drejer) Hultén WA (S)
CAHA7 Carex haydenii Dewey Hayden's sedge MI (PREX), NJ (E), NY (E), OH (PRX)
CAHE4 Carex heleonastes L. f. Hudson Bay sedge MI (E)
CAHE8 Carex heteroneura W. Boott different-nerve sedge WA (S)
CAHI6 Carex hirsutella Mack. fuzzy wuzzy sedge CT (SC), NH (E)
CAHI5 Carex hirtifolia Mack. pubescent sedge TN (SC)
CAHI8 Carex hitchcockiana Dewey Hitchcock's sedge CT (SC), MD (E), MA (SC), NY (T), TN (T)
CAHO8 Carex hormathodes Fernald marsh straw sedge NY (T)
CAHO9 Carex houghtoniana Torr. ex Dewey Houghton's sedge NY (T)
CAHY2 Carex hyalina Boott tissue sedge TN (SC)
CAHY3 Carex hyalinolepis Steud. shoreline sedge PA (X)
CAHY4 Carex hystericina Muhl. ex Willd. bottlebrush sedge KY (H), MD (E), WA (S)
CAIN12 Carex intumescens Rudge greater bladder sedge IL (T)
CAJA2 Carex jamesii Schwein. James' sedge MN (T), NJ (E), NY (T)
CAJO2 Carex joorii L.H. Bailey cypress swamp sedge KY (E), NJ (E)
CAJU2 Carex juniperorum Catling, Reznicek & Crins juniper sedge KY (E), OH (T)
CALA16 Carex lacustris Willd. hairy sedge MD (T), TN (T)
CALA14 Carex laevivaginata (Kük.) Mack. smoothsheath sedge ME (SC), MN (T)
CALA11 Carex lasiocarpa Ehrh. woollyfruit sedge PA (R)
CALA31 Carex latebracteata Waterf. Waterfall's sedge AR (T)
CALA18 Carex laxiculmis Schwein. spreading sedge ME (E), MN (T)
CALAS Carex laxiflora Lam. var. serrulata F.J. Herm. broad looseflower sedge NY (E)
CALE8 Carex lenticularis Michx. lakeshore sedge MA (T), WI (T)
CALE11 Carex leptonervia (Fernald) Fernald nerveless woodland sedge IN (E), KY (E), MD (E), NJ (E)
CALI7 Carex limosa L. mud sedge CT (E), IN (E), NJ (E), OH (E), PA (T), RI (H)
CALI Carex livida (Wahlenb.) Willd. livid sedge ME (SC), VT (T)
CALIR Carex livida (Wahlenb.) Willd. var. radicaulis Paine livid sedge MA (E), NY (E)
CALO5 Carex longii Mack. Long's sedge OH (E)
CALO6 Carex louisianica L.H. Bailey Louisiana sedge NJ (E), OH (E)
CALU17 Carex lucorum Willd. ex Link Blue Ridge sedge IL (E), OH (E)
CALU3 Carex lupuliformis Sartwell ex Dewey false hop sedge CT (E), IN (R), MA (E), MI (T), NJ (E), NY (R), OH (T), WI (E)
CALU26 Carex lutea LeBlond sulphur sedge E NC (E)
CAMA9 Carex macloviana d'Urv. thickhead sedge ME (PX)
CAMA11 Carex macrochaeta C.A. Mey. longawn sedge WA (S)
CAMAI2 Carex magellanica Lam. ssp. irrigua (Wahlenb.) Hultén boreal bog sedge WA (S)
CAPA22 Carex paupercula Michx. CT (E), PA (R)
CAMA33 Carex manhartii Bryson Manhart's sedge GA (T), TN (E)
CAME2 Carex meadii Dewey Mead's sedge NY (E), PA (E)
CAME12 Carex merritt-fernaldii Mack. Fernald's sedge NY (T), OH (E)
CAME13 Carex mesochorea Mack. midland sedge MA (E), NY (E), OH (T)
CAMI15 Carex michauxiana Boeckeler Michaux's sedge MA (E), WI (T)
CAMI5 Carex microdonta Torr. & Hook. littletooth sedge FL (E)
CAMI17 Carex misera Buckley wretched sedge GA (T), TN (T)
CAMI18 Carex mitchelliana M.A. Curtis Mitchell's sedge NY (T), PA (E), RI (SC)
CAMO11 Carex molesta Mack. ex Bright troublesome sedge CT (SC), NY (T)
CAMU4 Carex muehlenbergii Schkuhr ex Willd. Muhlenberg's sedge ME (T), VT (T)
CAMU9 Carex muskingumensis Schwein. Muskingum sedge TN (PX, E)
CANI5 Carex nigra (L.) Reichard smooth black sedge MI (E), NY (E)
CANI3 Carex nigromarginata Schwein. black edge sedge CT (SC), IL (E), NY (E)
CANO2 Carex norvegica Retz. Norway sedge ME (E), WA (S)
CANOI Carex norvegica Retz. ssp. inferalpina (Wahlenb.) Hultén closedhead sedge
CAME9 Carex media R. Br. MI (T), WI (E)
CANO4 Carex novae-angliae Schwein. New England sedge CT (SC), MI (T)
CAOB4 Carex obtusata Lilj. obtuse sedge WA (S)
CAOL2 Carex oligocarpa Schkuhr ex Willd. richwoods sedge CT (E), MI (T), NJ (E), VT (E)
CAOL3 Carex oligosperma Michx. fewseed sedge CT (SC), IL (E), MA (E), NC (E), OH (T), PA (T)
CAOP5 Carex opaca (F.J. Herm.) P. Rothr. & Reznicek Bicknell's sedge
CABIO Carex bicknellii Britton var. opaca F.J. Herm. AR (E)
CAOR6 Carex oronensis Fernald Orono sedge ME (T)
CAOU Carex ouachitana Kral, Manhart & Bryson Ouachita Mountain sedge TN (SC)
CAOX Carex oxylepis Torr. & Hook. sharpscale sedge IL (T)
CAOXP Carex oxylepis Torr. & Hook. var. pubescens J.K. Underw. sharpscale sedge TN (SC)
CAPA17 Carex pallescens L. pale sedge MN (E), OH (T), TN (SC)
CAPA19 Carex pauciflora Lightf. fewflower sedge CT (SC), MA (E), PA (E), WA (S)
CAPE11 Carex peckii Howe Peck's sedge NJ (E), OH (PRX)
CAPE4 Carex pedunculata Muhl. ex Willd. longstalk sedge IN (R), MD (E), RI (T)
CAPE42 Carex pellita Muhl. ex Willd. woolly sedge
CALA30 Carex lanuginosa auct. non Michx. KY (E), TN (PX, E)
CAPH8 Carex ×physocarpioides Lepage [saxatilis × utriculata]
CASAM Carex saxatilis L. var. major Olney WA (S)
CAPL18 Carex planispicata Naczi flat-spiked sedge
CAAMR Carex amphibola Steud. var. rigida (L.H. Bailey) Fernald NH (T)
CAPL4 Carex plantaginea Lam. plantainleaf sedge MN (E), NJ (E)
CAPL5 Carex platyphylla Carey broadleaf sedge MI (T)
CAPL6 Carex pluriflora Hultén manyflower sedge WA (S)
CAPO4 Carex polymorpha Muhl. variable sedge CT (E), ME (E), MD (E, X), MA (E), NH (T), NJ (E), PA (T), RI (E), VA (E)
CAPR6 Carex prairea Dewey ex Alph. Wood prairie sedge CT (T), ME (T), PA (T)
CAPR12 Carex prasina Wahlenb. drooping sedge IL (T), WI (T)
CAPR7 Carex praticola Rydb. meadow sedge ME (PX)
CAPR9 Carex projecta Mack. necklace sedge OH (T)
CAPR10 Carex proposita Mack. Great Smoky Mountain sedge WA (S)
CAPS Carex pseudocyperus L. cypress-like sedge CT (E), IN (E), NJ (E), OH (E), PA (E)
CAPU12 Carex purpurifera Mack. purple sedge GA (T), OH (E)
CARA5 Carex rariflora (Wahlenb.) Sm. looseflower alpine sedge ME (PX)
CARE14 Carex recta Boott estuary sedge ME (T), MA (E)
CARE17 Carex reniformis (L.H. Bailey) Small kidneyshape sedge IL (E), KY (E), TN (SC)
CARE9 Carex retroflexa Muhl. ex Willd. reflexed sedge NH (T), NY (E)
CARE4 Carex retrorsa Schwein. knotsheath sedge IN (E), OH (E), PA (E)
CARI Carex richardsonii R. Br. Richardson's sedge IN (E), OH (PRX), PA (E), VT (E)
CARO10 Carex roanensis F.J. Herm. Roan Mountain sedge KY (E), TN (E)
CARO5 Carex rossii Boott Ross' sedge MI (T)
CARO6 Carex rostrata Stokes beaked sedge TN (T), WA (S)
CARU6 Carex ruthii Mack. Ruth's sedge TN (T)
CASA8 Carex sartwellii Dewey Sartwell's sedge NY (T), PA (X)
CASA10 Carex saxatilis L. rock sedge ME (E)
CASC13 Carex scabrata Schwein. eastern rough sedge IN (E)
CASC9 Carex schweinitzii Dewey ex Schwein. Schweinitz's sedge CT (E), MA (E), NY (T), NC (E), PA (E), RI (H), WI (E)
CASC10 Carex scirpoidea Michx. northern singlespike sedge ME (T), MI (T), NH (T), NY (E), WA (S)
CASE6 Carex seorsa Howe weak stellate sedge IN (R), KY (SC), MI (T), NH (E), NY (T)
CASH2 Carex shortiana Dewey Short's sedge MD (E), NY (E)
CASI12 Carex siccata Dewey dryspike sedge ME (T), NJ (E), OH (E), VT (E)
CAAE Carex aenea Fernald NC (E), PA (X)
CAFO3 Carex foenea Willd. CT (SC), TN (T), VT (E), WA (S)
CASI6 Carex silicea Olney beach sedge ME (SC), MD (E)
CASO Carex socialis Mohlenbr. & Schwegm. low woodland sedge IN (R)
CASP3 Carex sparganioides Muhl. ex Willd. bur-reed sedge ME (E), NH (E), RI (H)
CASP35 Carex specicola J.T. Howell Navajo sedge
CASP9 Carex specuicola J.T. Howell Navajo sedge T AZ (HS)
CASP7 Carex sprengelii Dewey ex Spreng. Sprengel's sedge ME (SC), OH (T)
CASQ2 Carex squarrosa L. squarrose sedge CT (SC)
CAST55 Carex ×stenolepis Less. [saxatilis × vesicaria] ME (E)
CAST16 Carex sterilis Willd. dioecious sedge CT (SC), ME (T), MA (T), MN (T), PA (E), RI (H), TN (PX, E)
CASTM Carex stipata Muhl. ex Willd. var. maxima Chapm. stalkgrain sedge KY (SC)
CAST6 Carex straminea Willd. ex Schkuhr eastern straw sedge IN (T), KY (T), MI (E), NY (E)
CAST41 Carex striata Michx. Walter's sedge MA (E)
CASTB Carex striata Michx. var. brevis L.H. Bailey Walter's sedge RI (E)
CAST17 Carex striatula Michx. lined sedge IL (E), NY (E), OH (E)
CAST9 Carex styloflexa Buckley bent sedge NY (E), OH (PRX)
CAST10 Carex stylosa C.A. Mey. variegated sedge WA (S)
CASY Carex sychnocephala Carey manyhead sedge NY (E), WA (S)
CATE3 Carex tenera Dewey quill sedge MD (E, X)
CATE5 Carex tenuiflora Wahlenb. sparseflower sedge ME (SC), NY (E), OH (PRX), WA (S)
CATE6 Carex tetanica Schkuhr rigid sedge CT (SC), KY (E), MD (E, X), MA (SC), PA (T)
CATI2 Carex tincta (Fernald) Fernald tinged sedge NY (E)
CATO9 Carex tompkinsii J.T. Howell Thompkins' sedge CA (R)
CATOR Carex tonsa (Fernald) E.P. Bicknell var. rugosperma (Mack.) Crins parachute sedge
CARU5 Carex rugosperma Mack. KY (T)
CATR11 Carex ×trichina Fernald [tenuiflora × trisperma] ME (PX)
CATR8 Carex trichocarpa Muhl. ex Willd. hairyfruit sedge CT (SC), MA (T)
CATR10 Carex trisperma Dewey threeseeded sedge IL (E)
CATU2 Carex tuckermanii Dewey Tuckerman's sedge CT (SC), IL (E), MD (E), MA (E), NJ (E)
CATY Carex typhina Michx. cattail sedge CT (SC), ME (PX), MA (T), MI (T), NY (T), PA (E)
CAUM4 Carex umbellata Schkuhr ex Willd. parasol sedge NH (E)
CAVA2 Carex vaginata Tausch sheathed sedge ME (SC), NY (E), VT (E)
CAVA3 Carex vallicola Dewey valley sedge WA (S)
CAVE7 Carex venusta Dewey darkgreen sedge MD (T)
CAVEM Carex venusta Dewey var. minor Boeckeler darkgreen sedge NY (E)
CAVE6 Carex vesicaria L. blister sedge MD (T)
CAVE9 Carex vestita Willd. velvet sedge ME (E), MD (E), TN (PX, E)
CAVI5 Carex viridula Michx. little green sedge CT (E), IL (T), PA (E)
CAWI7 Carex wiegandii Mack. Wiegand's sedge ME (SC), MA (E), MI (T), NH (T), NY (E), PA (T)
CAWI2 Carex willdenowii Schkuhr ex Willd. Willdenow's sedge CT (SC), IL (T), NY (T)
CAWO2 Carex woodii Dewey pretty sedge CT (SC), IL (T)
CAXE Carex xerantica L.H. Bailey whitescale sedge WA (S)
CAGI10 Carnegiea gigantea (Engelm.) Britton & Rose saguaro
CAGI7 Carnegia gigantea (Engelm.) Britton & Rose, orth. var. AZ (HS, SR)
CACA17 Carpenteria californica Torr. tree anemone CA (T)
CAAQ2 Carya aquatica (Michx. f.) Nutt. water hickory KY (T)
CACO15 Carya cordiformis (Wangenh.) K. Koch bitternut hickory ME (E)
CALA21 Carya laciniosa (Michx. f.) G. Don shellbark hickory MD (E), NY (T)
CAMY Carya myristiciformis (Michx. f.) Nutt. nutmeg hickory NC (T)
CAPA24 Carya pallida (Ashe) Engl. & Graebn. sand hickory AR (T), IL (E), IN (T)
CATE9 Carya texana Buckley black hickory IN (E)
CALY4 Cassiope lycopodioides (Pall.) D. Don clubmoss mountain heather WA (S)
CADE12 Castanea dentata (Marsh.) Borkh. American chestnut KY (E), ME (SC), MI (E), TN (SC)
CAPU9 Castanea pumila (L.) Mill. chinkapin KY (T), NJ (E)
CAEM4 Castela emoryi (A. Gray) Moran & Felger crucifixion thorn AZ (SR)
CAAFN2 Castilleja affinis Hook. & Arn. ssp. neglecta (Zeile) T.I. Chuang & Heckard Tiburon Indian paintbrush E CA (T)
CACAS5 Castilleja campestris (Benth.) T.I. Chuang & Heckard ssp. succulenta (Hoover) T.I. Chuang & Heckard succulent owl's-clover T CA (E)
CACI6 Castilleja cinerea A. Gray ashgray Indian paintbrush T
CACO17 Castilleja coccinea (L.) Spreng. scarlet Indian paintbrush CT (E), KY (E), ME (PX), MD (E), NY (E), RI (H)
CACR14 Castilleja cryptantha Pennell & G.N. Jones obscure Indian paintbrush WA (S)
CAGR21 Castilleja grisea Dunkle San Clemente Island Indian paintbrush E CA (E)
CALE27 Castilleja levisecta Greenm. golden Indian paintbrush T OR (E), WA (E)
CAMIM5 Castilleja miniata Douglas ex Hook. ssp. miniata giant red Indian paintbrush
CAUL2 Castilleja uliginosa Eastw. CA (E)
CAMO8 Castilleja mollis Pennell softleaf Indian paintbrush E
CAPR14 Castilleja pruinosa Fernald frosted Indian paintbrush
CAGL17 Castilleja gleasoni Elmer CA (R)
CASA20 Castilleja salsuginosa N.H. Holmgren Monte Neva Indian paintbrush NV (FP)
CASE4 Castilleja septentrionalis Lindl. Labrador Indian paintbrush ME (SC), MI (T), MN (E), NH (T), VT (T)
CASE5 Castilleja sessiliflora Pursh downy paintedcup IL (E)
CASU12 Castilleja sulphurea Rydb. sulphur Indian paintbrush
CAMO16 Castilleja mogollonica Pennell AZ (SR)
CAAQ3 Catabrosa aquatica (L.) P. Beauv. water whorlgrass WI (E)
CASP8 Catalpa speciosa (Warder) Warder ex Engelm. northern catalpa IN (R)
CALA60 Catapyrenium lachneum (Ach.) R. Sant. earth lichen OH (E)
CAME19 Catesbaea melanocarpa Krug & Urb. tropical lilythorn E
CAPA43 Catesbaea parviflora Sw. smallflower lilythorn FL (E)
CABE5 Catopsis berteroniana (Schult. & Schult. f.) Mez powdery strap airplant FL (E)
CAFL10 Catopsis floribunda L.B. Sm. Florida strap airplant FL (E)
CANU13 Catopsis nutans auct. non (Sw.) Griseb. FL (E)
CAGI6 Caulophyllum giganteum (Farw.) Loconte & Blackwell giant blue cohosh TN (T)
CATH2 Caulophyllum thalictroides (L.) Michx. blue cohosh RI (T)
CEAM Ceanothus americanus L. New Jersey tea ME (T)
CEFE2 Ceanothus ferrisiae McMinn Coyote ceanothus E
CEHE2 Ceanothus hearstiorum Hoover & J.B. Roof Hearst Ranch buckbrush CA (R)
CEHE Ceanothus herbaceus Raf. Jersey tea IL (E), IN (X), KY (T), NY (E), OH (E), VT (E)
CEMA Ceanothus maritimus Hoover maritime ceanothus CA (R)
CEMA3 Ceanothus masonii McMinn Mason's ceanothus CA (R)
CEOP Ceanothus ophiochilus Boyd, Ross & Arnseth Vail Lake ceanothus T CA (E)
CERO4 Ceanothus roderickii Knight Pine Hill buckbrush E CA (R)
CESA Ceanothus sanguineus Pursh redstem ceanothus MI (T)
CESC Celastrus scandens L. American bittersweet NY (EV)
CENI Celosia nitida Vahl West Indian cock's comb FL (E)
CEEH Celtis ehrenbergiana (Klotzsch) Liebm. spiny hackberry
CEPA8 Celtis pallida Torr. FL (E)
CEIG Celtis iguanaea (Jacq.) Sarg. iguana hackberry FL (E)
CEOC Celtis occidentalis L. common hackberry NH (T)
CEAG Cenchrus agrimonioides Trin. kamanomano E
CELO3 Cenchrus longispinus (Hack.) Fernald mat sandbur ME (T), NH (T)
CETR Cenchrus tribuloides L. sanddune sandbur NY (T)
CEMU2 Centaurium muehlenbergii (Griseb.) W. Wight ex Piper Muhlenberg's centaury WA (PX)
CENA Centaurium namophilum Reveal, Broome & Beatley springloving centaury T NV (FP)
CESE6 Centaurium sebaeoides (Griseb.) Druce lavaslope centaury E
CEER2 Centella erecta (L. f.) Fernald erect centella MD (E)
CEAR5 Centrosema arenicola (Small) F.J. Herm. pineland butterfly pea FL (E)
CEVI2 Centrosema virginianum (L.) Benth. spurred butterfly pea NJ (E)
CEMA22 Cephaloziella massalongi (Spruce) Müll. Frib. TN (E)
CEARV3 Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho var. velutinum (Raf.) Britton field chickweed
CEVE8 Cerastium velutinum Raf. TN (E)
CEARV4 Cerastium arvense L. ssp. velutinum (Raf.) Ugborogho var. villosum (Muhl. ex Darl.) Hollick & Britton field chickweed
CEARV6 Cerastium arvense L. var. villosissimum Pennell PA (E)
CENU2 Cerastium nutans Raf. nodding chickweed MA (E)
CEER3 Ceratiola ericoides Michx. sand heath GA (T)
CEEC2 Ceratophyllum echinatum A. Gray spineless hornwort ME (SC), MD (E), NJ (E), NY (T), TN (SC)
CECA4 Cercis canadensis L. eastern redbud CT (SC), NJ (E)
CECAT Cercis canadensis L. var. texensis (S. Watson) M. Hopkins Texas redbud
CEOC3 Cercis occidentalis Torr. ex A. Gray AZ (SR)
CETR4 Cercocarpus traskiae Eastw. Catalina Island mountain mahogany E CA (E)
CHTH Chaenactis thompsonii Cronquist Thompson's pincushion WA (S)
CHPR Chaerophyllum procumbens (L.) Crantz spreading chervil NY (E)
CHPRS Chaerophyllum procumbens (L.) Crantz var. shortii Torr. & A. Gray Short's spreading chervil IN (E)
CHFAM2 Chamaecrista fasciculata (Michx.) Greene var. macrosperma (Fernald) C.F. Reed partridge pea MD (E)
CHGLM2 Chamaecrista glandulosa (L.) Greene var. mirabilis (Pollard) Irwin & Barneby Jamaican broom E PR (E)
CHLIK Chamaecrista lineata (Sw.) Greene var. keyensis (Pennell) Irwin & Barneby narrowpod sensitive pea
CAKE3 Cassia keyensis (Pennell) J.F. Macbr. FL (E)
CHNIN2 Chamaecrista nictitans (L.) Moench ssp. nictitans var. nictitans sensitive partridge pea
CANI4 Cassia nictitans L. NH (E)
CHTH2 Chamaecyparis thyoides (L.) Britton, Sterns & Poggenb. Atlantic white cedar GA (R), ME (SC), NY (R), PA (X)
CHCA2 Chamaedaphne calyculata (L.) Moench leatherleaf IL (T), MD (T)
CHLU Chamaelirium luteum (L.) A. Gray fairywand CT (E), IN (E), MA (E), NY (T)
CHERN Chamaerhodos erecta (L.) Bunge ssp. nuttallii (Pickering ex Rydb.) Hultén Nuttall's little rose
CHNUK Chamaerhodos nuttallii Pickering ex Rydb. var. keweenawensis Fernald MI (E)
CHCEK Chamaesyce celastroides (Boiss.) Croizat & O. Deg. var. kaenana (Sherff) O. Deg. & I. Deg. 'ekoko E
CHCU4 Chamaesyce cumulicola Small coastal dune sandmat FL (E)
CHDE7 Chamaesyce deltoidea (Engelm. ex Chapm.) Small wedge sandmat FL (E)
CHDED Chamaesyce deltoidea (Engelm. ex Chapm.) Small ssp. deltoidea wedge sandmat E
CHDE8 Chamaesyce deppeana (Boiss.) Millsp. Oahu sandmat E
CHGA3 Chamaesyce garberi (Engelm. ex Chapm.) Small Garber's sandmat T FL (E)
CHHA2 Chamaesyce halemanui (Sherff) Croizat & O. Deg. Kauai sandmat E
CHHE3 Chamaesyce herbstii W.L. Wagner Herbst's sandmat E
CHHO3 Chamaesyce hooveri (L.C. Wheeler) Koutnik Hoover's sandmat T
CHKU Chamaesyce kuwaleana (O. Deg. & Sherff) O. Deg. & I. Deg. kokomalei E
CHPE14 Chamaesyce pergamena (Small) Small FL (T)
CHPO6 Chamaesyce polygonifolia (L.) Small seaside sandmat IL (E), PA (T)
CHPO7 Chamaesyce porteriana Small Porter's sandmat FL (E)
CHRO2 Chamaesyce rockii (Forbes) Croizat & O. Deg. Koolau Range sandmat E
CHSE4 Chamaesyce serpens (Kunth) Small matted sandmat
EUSE4 Euphorbia serpens Kunth IN (X), OH (E)
CHSKS Chamaesyce skottsbergii (Sherff) Croizat & O. Deg. var. skottsbergii coastal sandmat
CHSKK Chamaesyce skottsbergii (Sherff) Croizat & O. Deg. var. kalaeloana (Sherff) O. Deg. & I. Deg. E
CHANA2 Chamerion angustifolium (L.) Holub ssp. angustifolium fireweed
EPAN2 Epilobium angustifolium L. IN (E), OH (E), TN (SC)
CHAL18 Chaptalia albicans (Sw.) Vent. ex Steud. white sunbonnets FL (T)
CHLA5 Chasmanthium latifolium (Michx.) Yates Indian woodoats MI (T)
CHLA6 Chasmanthium laxum (L.) Yates slender woodoats NY (E), PA (E)
CHAL5 Cheilanthes alabamensis (Buckley) Kunze Alabama lipfern KY (E)
CHFE Cheilanthes feei T. Moore slender lipfern KY (E), WA (S)
CHLA2 Cheilanthes lanosa (Michx.) D.C. Eaton hairy lipfern CT (E), IN (R), MN (E), NY (E)
CHMI4 Cheilanthes microphylla (Sw.) Sw. southern lipfern FL (E)
CHPA14 Cheiroglossa palmata (L.) C. Presl hand fern
OPPA3 Ophioglossum palmatum L. FL (E)
CHGL2 Chelone glabra L. white turtlehead NY (EV)
CHOB3 Chelone obliqua L. red turtlehead MD (T), MI (E)
CHOBO Chelone obliqua L. var. obliqua red turtlehead KY (E)
CHOBS Chelone obliqua L. var. speciosa Pennell & Wherry red turtlehead AR (E), KY (SC)
CHALM2 Chenopodium album L. var. missouriense (Aellen) I.J. Bassett & C.W. Crompton Missouri lambsquarters NY (E)
CHBE4 Chenopodium berlandieri Moq. pitseed goosefoot ME (SC)
CHBEB Chenopodium berlandieri Moq. var. boscianum (Moq.) Wahl pitseed goosefoot
CHBO9 Chenopodium boscianum Moq. NH (E)
CHBEM Chenopodium berlandieri Moq. var. macrocalycium (Aellen) Cronquist pitseed goosefoot NY (E)
CHCA4 Chenopodium capitatum (L.) Asch. blite goosefoot OH (PRX)
CHFO3 Chenopodium foggii Wahl Fogg's goosefoot MA (E), PA (E)
CHHU Chenopodium humile Hook. marshland goosefoot ME (T)
CHLE4 Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson narrowleaf goosefoot OH (PRX), RI (SC)
CHRU Chenopodium rubrum L. red goosefoot ME (T), NH (T), NJ (E), NY (T)
CHSI2 Chenopodium simplex (Torr.) Raf. mapleleaf goosefoot
CHGI2 Chenopodium gigantospermum Aellen MD (E)
CHST2 Chenopodium standleyanum Aellen Standley's goosefoot MD (E)
CHLIA Chilopsis linearis (Cav.) Sweet ssp. arcuata (Fosberg) Henrickson desert willow
CHLIA2 Chilopsis linearis (Cav.) Sweet var. arcuata Fosberg AZ (SA)
CHLIL2 Chilopsis linearis (Cav.) Sweet ssp. linearis desert willow
CHLIG Chilopsis linearis (Cav.) Sweet var. glutinosa (Engelm.) Fosberg AZ (SA)
CHMA3 Chimaphila maculata (L.) Pursh striped prince's pine IL (E), ME (E), NY (EV)
CHUM Chimaphila umbellata (L.) W. Bartram pipsissewa IL (E), IA (T), NY (EV), OH (T)
CHUMC2 Chimaphila umbellata (L.) W. Bartram ssp. cisatlantica (S.F. Blake) Hultén pipsissewa IN (T)
CHPY2 Chionanthus pygmaeus Small pygmy fringetree E FL (E)
CHVI3 Chionanthus virginicus L. white fringetree OH (T)
CHPU2 Chlorogalum purpureum Brandegee purple amole T
CHPUR Chlorogalum purpureum Brandegee var. reductum Hoover Camatta Canyon amole CA (R)
CHHO2 Chorizanthe howellii Goodman Mendocino spineflower E CA (T)
CHOR Chorizanthe orcuttiana Parry San Diego spineflower E CA (E)
CHPUH2 Chorizanthe pungens Benth. var. hartwegiana Reveal & Hardham Hartweg's spineflower E
CHPUP3 Chorizanthe pungens Benth. var. pungens Monterey spineflower T
CHRO Chorizanthe robusta Parry robust spineflower E
CHVA Chorizanthe valida S. Watson Sonoma spineflower E CA (E)
CHFR4 Chromolaena frustrata (B.L. Rob.) King & H. Rob. Cape Sable thoroughwort
EUFR2 Eupatorium frustratum B.L. Rob. FL (E)
CHVI5 Chrysogonum virginianum L. green and gold KY (E), OH (T), PA (E), TN (T)
CHCH7 Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist giant chinquapin WA (S)
CHPA18 Chrysoma pauciflosculosa (Michx.) Greene woody goldenrod NC (E)
CHOL Chrysophyllum oliviforme L. satinleaf FL (T)
CHFL8 Chrysopsis floridana Small Florida goldenaster E FL (E)
CHGO2 Chrysopsis godfreyi Semple Godfrey's goldenaster FL (E)
CHGOC Chrysopsis gossypina (Michx.) Elliott ssp. cruiseana (Dress) Semple cottony goldenaster
CHCR4 Chrysopsis cruiseana Dress FL (E)
CHMA14 Chrysopsis mariana (L.) Elliot Maryland goldenaster PA (E), RI (T)
CHALS3 Chrysosplenium alternifolium L. var. sibiricum Ser. ex DC. Iowa golden saxifrage
CHIO Chrysosplenium iowense Rydb. IA (T), MN (E)
CHAM2 Chrysosplenium americanum Schwein. ex Hook. American golden saxifrage IN (T), KY (E)
CHTE3 Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fr. northern golden saxifrage WA (S)
CIBU Cicuta bulbifera L. bulblet-bearing water hemlock MD (E), WA (S)
CIYU Cienfuegosia yucatanensis Millsp. Yucatan flymallow FL (E)
CILA2 Cinna latifolia (Trevis. ex Goepp.) Griseb. drooping woodreed MD (T), NJ (E), OH (E)
CIAL Circaea alpina L. small enchanter's nightshade IL (E), IN (X), KY (SC), RI (SC)
CIPI70 Cirriphyllum piliferum (Hedw.) Grout cirriphyllum moss KY (T)
CICA7 Cirsium carolinianum (Walter) Fernald & B.G. Schub. soft thistle IN (R), OH (T)
CICI Cirsium ciliolatum (L.F. Hend.) J.T. Howell Ashland thistle CA (E)
CIFOF Cirsium fontinale (Greene) Jeps. var. fontinale fountain thistle E CA (E)
CIFOO Cirsium fontinale (Greene) Jeps. var. obispoense J.T. Howell Chorro Creek Bog thistle E CA (E)
CIHI Cirsium hillii (Canby) Fernald Hill's thistle IL (T), IN (E), WI (T)
CIHO2 Cirsium horridulum Michx. yellow thistle CT (E), NH (E), PA (E), RI (T)
CIHYH Cirsium hydrophilum (Greene) Jeps. var. hydrophilum Suisun thistle E
CILO Cirsium loncholepis Petr. la graciosa thistle E CA (T)
CIMU Cirsium muticum Michx. swamp thistle AR (T)
CIPA Cirsium parryi (A. Gray) Petr. Parry's thistle AZ (SR)
CIPI Cirsium pitcheri (Torr. ex Eaton) Torr. & A. Gray sand dune thistle T IL (T), IN (T), MI (T), WI (T)
CIRH Cirsium rhothophilum S.F. Blake surf thistle CA (T)
CIVI4 Cirsium vinaceum Woot. & Standl. Sacramento Mountain thistle T NM (E)
CIVI6 Cirsium virginense S.L. Welsh virgin thistle AZ (SR)
CIVI Cirsium virginianum (L.) Michx. Virginia thistle NJ (E)
CIPA4 Cissampelos pareira L. velvetleaf FL (E)
CIPU5 Cistanthe pulchella (Eastw.) Hershkovitz Mariposa pussypaws
CAPU28 Calyptridium pulchellum (Eastw.) Hoover T
CIRO2 Cistanthe rosea (S. Watson) Hershkovitz rosy pussypaws
CARO Calyptridium roseum S. Watson WA (S)
CLMA Cladium mariscoides (Muhl.) Torr. smooth sawgrass PA (E)
CLPE5 Cladonia perforata A. Evans cup lichen E FL (E)
CLKE Cladrastis kentukea (Dum. Cours.) Rudd Kentucky yellowwood
CLLU Cladrastis lutea (Michx. f.) K. Koch IL (E), IN (T)
CLFR3 Clarkia franciscana F.H Lewis & P.H. Raven Presidio clarkia E CA (E)
CLIM Clarkia imbricata F.H. Lewis & M.E. Lewis Vine Hill clarkia E CA (E)
CLLI Clarkia lingulata F.H. Lewis & M.E. Lewis Merced clarkia CA (E)
CLSPI Clarkia speciosa F.H. Lewis & M.E. Lewis ssp. immaculata F.H. Lewis & M.E. Lewis Pismo clarki E CA (R)
CLSP6 Clarkia springvillensis Vasek Springville clarkia T CA (E)
CLLAP Claytonia lanceolata Pall. ex Pursh var. pacifica McNeill Pacific springbeauty WA (S)
CLVI3 Claytonia virginica L. Virginia springbeauty MA (E), RI (H)
CLVIH Claytonia virginica L. var. hammondiae (Kalmbacher) Doyle, W.H. Lewis & Snyder Hammond's claytonia NJ (E)
CLDI Cleistes divaricata (L.) Ames rosebud orchid FL (T), MD (E), NJ (E)
CLCR Clematis crispa L. swamp leather flower IL (E), KY (T)
CLGL Clematis glaucophylla Small whiteleaf leather flower TN (E)
CLHIA Clematis hirsutissima Pursh var. arizonica (A. Heller) Erickson Arizona clematis AZ (HS)
CLMO6 Clematis morefieldii Kral Huntsville vasevine E
CLOC2 Clematis occidentalis (Hornem.) DC. western blue virginsbower IL (E), ME (SC), MD (E), MA (SC), OH (PRX), RI (E)
CLOC Clematis ochroleuca Aiton curlyheads MD (E, X)
CLPI Clematis pitcheri Torr. & A. Gray bluebill IN (R)
CLSO3 Clematis socialis Kral Alabama leather flower E GA (E)
CLVI4 Clematis viorna L. vasevine IL (E), PA (E)
CLMU Cleome multicaulis DC. slender spiderflower AZ (SR), NM (E)
CLDR2 Clermontia drepanomorpha Rock Kohala Mountain clermontia E
CLLI3 Clermontia lindseyana Rock hillside clermontia E
CLOBB Clermontia oblongifolia Gaudich. ssp. brevipes (E. Wimm.) Lammers Oahu clermontia E
CLOBM Clermontia oblongifolia Gaudich. ssp. mauiensis (Rock) Lammers Oahu clermontia E
CLPE2 Clermontia peleana Rock pele clermontia E
CLPY2 Clermontia pyrularia Hillebr. Hamakua clermontia E
CLSA5 Clermontia samuelii Forbes Hana clermontia E
CLAC3 Clethra acuminata Michx. mountain sweetpepperbush PA (E)
CLAL3 Clethra alnifolia L. coastal sweetpepperbush ME (SC), TN (T)
CLAR5 Clinopodium arkansanum (Nutt.) House limestone calamint
CAAR33 Calamintha arkansana (Nutt.) Shinners OH (T)
SAGLA2 Satureja glabella (Michx.) Briq. var. angustifolia (Torr.) Svens. IN (E)
CLAS2 Clinopodium ashei (Weath.) Small Ashe's calamint
CAAS9 Calamintha ashei (Weath.) Shinners FL (T), GA (T)
CLDE4 Clinopodium dentatum (Chapm.) Kuntze Florida calamint
CADE26 Calamintha dentata Chapm. FL (T)
CLGE Clinopodium georgianum Harper Georgia calamint
CAGE7 Calamintha georgiana (Harper) Shinners FL (E)
CLVU Clinopodium vulgare L. wild basil
SAVUN Satureja vulgaris (L.) Fritsch var. neogaea Fernald IN (E)
CLBO3 Clintonia borealis (Aiton) Raf. bluebead IN (E), MD (T), OH (E), TN (SC)
CLUM2 Clintonia umbellulata (Michx.) Morong white clintonia NY (EV), OH (T)
CLFR2 Clitoria fragrans Small sweetscented pigeonwings T FL (E)
CLMA4 Clitoria mariana L. Atlantic pigeonwings NJ (E), PA (E)
COPA29 Coccocarpia palmicola (Spreng.) Arv. & D.J. Galloway coccocarpia lichen MN (T)
COAR Coccothrinax argentata (Jacq.) L.H. Bailey Florida silver palm FL (T)
COGR6 Cochlearia groenlandica L. Danish scurvygrass
COOFA Cochlearia officinalis L. ssp. arctica (Schltdl.) Hultén WA (S)
CORU3 Coelorachis rugosa (Nutt.) Nash wrinkled jointtail grass MD (E), NJ (E)
COTU Coelorachis tuberculosa (Nash) Nash bumpy jointtail grass FL (T)
COBA8 Collema bachmanianum (Fink) Degel. Bachman's jelly lichen OH (E)
COCO25 Collema coccophorum Tuck. jelly lichen OH (E)
COCO26 Collema conglomeratum Hoffm. conglomerate jelly lichen OH (E)
COCR6 Collema crispum (Huds.) F.H. Wigg. jelly lichen OH (PRX)
COFU60 Collema fuscovirens (With.) J.R. Laundon jelly lichen OH (E)
COPA3 Collinsia parviflora Lindl. maiden blue eyed Mary MI (T)
COSPB Collinsia sparsiflora Fisch. & C.A. Mey. var. bruceae (M.E. Jones) Newsom spinster's blue eyed Mary WA (S)
COVE2 Collinsia verna Nutt. spring blue eyed Mary NY (E), TN (E)
COVI2 Collinsia violacea Nutt. violet blue eyed Mary IL (E)
COCA4 Collinsonia canadensis L. richweed WI (E)
COVE3 Collinsonia verticillata Baldw. stoneroot KY (E), OH (E)
COMA3 Collomia macrocalyx Leiberg ex Brand bristleflower collomia WA (S)
COOR12 Cololejeunea ornata A. Evans TN (T)
COAR3 Colubrina arborescens (Mill.) Sarg. greenheart FL (E)
COCU Colubrina cubensis (Jacq.) Brongn. Cuban nakedwood FL (E)
COEL2 Colubrina elliptica (Sw.) Briz. & Stern soldierwood FL (E)
COOP Colubrina oppositifolia Brongn. ex Mann kauila E
COPA28 Comarum palustre L. purple marshlocks
POPA14 Potentilla palustris (L.) Scop. NJ (E)
COER Commelina erecta L. whitemouth dayflower IA (T), MI (PREX), NJ (E), PA (X)
COVI3 Commelina virginica L. Virginia dayflower PA (X)
COPE80 Comptonia peregrina (L.) J.M. Coult. sweet fern IL (E), KY (E), OH (T), TN (E)
COCH2 Conioselinum chinense (L.) Britton, Sterns & Poggenb. Chinese hemlockparsley IL (E), IN (E), MA (SC), NJ (E), NC (E), PA (E), WI (E)
COAM Conopholis americana (L.) Wallr. American cancer-root NH (T), NY (EV), RI (SC)
COCA19 Conradina canescens (Torr. & A. Gray ex Benth.) A. Gray false rosemary
COBR5 Conradina brevifolia Shinners E FL (E)
COET Conradina etonia Kral & McCartney Eton rosemary E FL (E)
COGL9 Conradina glabra Shinners Apalachicola false rosemary E FL (E)
COGR8 Conradina grandiflora Small largeflower false rosemary FL (T)
COVE4 Conradina verticillata Jennison Cumberland false rosemary T KY (E), TN (T)
COCO14 Consolea corallicola Small semaphore pricklypear
OPCO14 Opuntia corallicola (Small) Backeb. FL (E)
COMA19 Convallaria majuscula Greene American lily-of-the-valley
COMO4 Convallaria montana Raf. KY (E)
COCAP3 Conyza canadensis (L.) Cronquist var. pusilla (Nutt.) Cronquist Canadian horseweed IN (X)
CORA4 Conyza ramosissima Cronquist dwarf horseweed OH (T)
COAS Coptis aspleniifolia Salisb. fernleaf goldthread WA (S)
COTR2 Coptis trifolia (L.) Salisb. threeleaf goldthread MD (E), WA (S)
COMA25 Corallorhiza maculata (Raf.) Raf. summer coralroot RI (SC)
COMA4 Corallorrhiza maculata (Raf.) Raf., orth. var. AZ (SR), IL (T), IA (T), KY (E), NY (EV), TN (T)
COOD7 Corallorhiza odontorhiza (Willd.) Poir. autumn coralroot FL (E)
COOD Corallorrhiza odontorhiza (Willd.) Poir., orth. var. ME (E), MA (SC), NH (E), NY (EV), RI (E), VT (T)
COST19 Corallorhiza striata Lindl. hooded coralroot
COST Corallorrhiza striata Lindl., orth. var. AZ (SR), NY (E)
COTR18 Corallorhiza trifida Chatelain yellow coralroot RI (SC)
COTR3 Corallorrhiza trifida Chatelain, orth. var. CT (T), MD (E), OH (E)
COTRV Corallorrhiza trifida Chatelain var. verna (Nutt.) Fernald, orth. var. IN (X)
COWI5 Corallorhiza wisteriana Conrad spring coralroot
COWI2 Corallorrhiza wisteriana Conrad, orth. var. AZ (SR), MD (E), PA (E)
COBE3 Cordia bellonis Urb. serpentine manjack E
COGL6 Cordia globosa (Jacq.) Kunth curaciao bush FL (E)
COMAM3 Cordylanthus maritimus Nutt. ex Benth. ssp. maritimus saltmarsh bird's-beak E CA (E)
COMAP Cordylanthus maritimus Nutt. ex Benth. ssp. palustris (Behr) T.I. Chuang & Heckard Pt. Reyes bird's-beak OR (E)
COMOM Cordylanthus mollis A. Gray ssp. mollis soft bird's-beak E CA (R)
CONI2 Cordylanthus nidularius J.T. Howell Mt. Diablo bird's-beak CA (R)
COPA8 Cordylanthus palmatus (Ferris) J.F. Macbr. palmbract bird's-beak E CA (E)
CORIL Cordylanthus rigidus (Benth.) Jeps. ssp. littoralis (Ferris) T.I. Chuang & Heckard seaside bird's beak CA (E)
COTEC Cordylanthus tenuis A. Gray ssp. capillaris (Pennell) T.I. Chuang & Heckard Pennell's bird's beak E CA (R)
COCO9 Corema conradii (Torr.) Torr. ex Loudon broom crowberry MA (SC), NJ (E), NY (E)
CODE3 Coreopsis delphiniifolia Lam. larkspurleaf tickseed TN (E)
COIN4 Coreopsis integrifolia Poir. fringeleaf tickseed FL (E)
COLA7 Coreopsis latifolia Michx. broadleaf tickseed TN (E)
COPA10 Coreopsis palmata Nutt. stiff tickseed MI (T)
COPU2 Coreopsis pubescens Elliot star tickseed KY (SC)
CORO Coreopsis rosea Nutt. pink tickseed MD (E), NY (R), PA (X), RI (SC)
COTR4 Coreopsis tripteris L. tall tickseed MD (E)
COAL2 Cornus alternifolia L. f. alternateleaf dogwood FL (E)
COAM2 Cornus amomum Mill. silky dogwood IN (E)
COCA13 Cornus canadensis L. bunchberry dogwood IL (E), IN (E), IA (T), MD (E), OH (T)
CODR Cornus drummondii C.A. Mey. roughleaf dogwood NY (E)
COFL2 Cornus florida L. flowering dogwood ME (E), NY (EV), VT (T)
COOB9 Cornus obliqua Raf. silky dogwood
COAMS Cornus amomum Mill. var. schuetzeana (C.A. Mey.) Rickett NJ (E)
CORU Cornus rugosa Lam. roundleaf dogwood IN (R), MD (E), RI (SC)
COOB4 Cornutia obovata Urb. nigua E PR (E)
COAU2 Corydalis aurea Willd. scrambled eggs IL (E), IA (T), NY (T), PA (E), VT (T)
COCAA Corydalis caseana A. Gray ssp. aquae-gelidae (M. Peck & Wilson) Zetterlund & Lidén coldwater fumewort
COAQ Corydalis aquae-gelidae M. Peck & Wilson WA (T)
COCU2 Corydalis curvisiliqua Engelm. curvepod fumewort IA (E)
COFL3 Corydalis flavula (Raf.) DC. yellow fumewort CT (T), MI (T)
COMIA2 Corydalis micrantha (Engelm. ex A. Gray) A. Gray ssp. australis (Chapm.) G.B. Ownbey smallflower fumewort
COHA3 Corydalis halei (Small) Fernald & B.G. Schub. IL (E)
COSE5 Corydalis sempervirens (L.) Pers. rock harlequin IL (E), IN (E), IA (T), KY (SC), RI (SC), TN (E)
COCO6 Corylus cornuta Marsh. beaked hazelnut OH (PRX)
COCOC2 Corylus cornuta Marsh. var. cornuta beaked hazelnut
CORO5 Corylus rostrata Aiton IL (E)
CORA7 Coryphantha ramillosa Cutak whiskerbush T TX (T)
CORE3 Coryphantha recurvata (Engelm.) Britton & Rose Santa Cruz beehive cactus AZ (HS, SR)
COROR Coryphantha robustispina (Schott ex Engelm.) Britton & Rose ssp. robustispina long-tubercle beehive cactus
COSCR Coryphantha scheeri (Muehlenpf.) L.D. Benson var. robustispina (Schott ex Engelm.) L.D. Benson E AZ (HS)
COROS Coryphantha robustispina (Schott ex Engelm.) Britton & Rose ssp. scheeri (Muehlenpf.) N.P. Taylor Scheer's beehive cactus
COSCS Coryphantha scheeri (Muehlenpf.) L.D. Benson var. scheeri NM (E)
COROU Coryphantha robustispina (Schott ex Engelm.) Britton & Rose ssp. uncinata (L.D. Benson) N.P. Taylor Scheer's beehive cactus
COSCU Coryphantha scheeri (Muehlenpf.) L.D. Benson var. uncinata L.D. Benson NM (E)
COSCV Coryphantha scheeri (Muehlenpf.) L.D. Benson var. valida (Engelm.) L.D. Benson, nom. inq. AZ (SR)
COOB2 Cotinus obovatus Raf. American smoketree TN (SC)
CRMU3 Cranichis muscosa Sw. cypress-knee helmet orchid FL (E)
CRRI4 Cranichis ricartii Ackerman Puerto Rico helmet orchid E PR (E)
CRAQ Crassula aquatica (L.) Schoenl. water pygmyweed CT (E), ME (SC), MD (E, X), MA (T), MN (T), NY (E), PA (X)
TIAQ3 Tillaea aquatica L. NH (E)
CRCO34 Crassula connata (Ruiz & Pav.) A. Berger sand pygmyweed WA (S)
CRAR6 Crataegus arborea Beadle Montgomery hawthorn IN (E)
CRBE2 Crataegus berberifolia Torr. & A. Gray barberry hawthorn NY (E)
CRBR3 Crataegus brainerdii Sarg. Brainerd's hawthorn OH (PRX)
CRCA Crataegus calpodendron (Ehrh.) Medik. pear hawthorn NJ (E)
CRCH Crataegus chrysocarpa Ashe fireberry hawthorn IN (E)
CRCO26 Crataegus compacta Sarg. clustered hawthorn NY (E)
CRDO2 Crataegus douglasii Lindl. black hawthorn MN (T)
CRGR13 Crataegus grandis Ashe grand hawthorn IN (E)
CRHA2 Crataegus harbisonii Beadle Harbison's hawthorn TN (E)
CRIN3 Crataegus intricata Lange Copenhagen hawthorn IN (R)
CRBI5 Crataegus biltmoreana Beadle IN (E)
CRKE2 Crataegus kelloggii Sarg. Kellogg's hawthorn IN (E)
CRMO2 Crataegus mollis Scheele downy hawthorn NY (E)
CRPE Crataegus pedicellata Sarg. scarlet hawthorn IN (T)
CRPH Crataegus phaenopyrum (L. f.) Medik. Washington hawthorn FL (E)
CRPR5 Crataegus prona Ashe Illinois hawthorn IN (E)
CRSU5 Crataegus succulenta Schrad. ex Link fleshy hawthorn IN (R), NJ (E)
CRBI7 Crataegus bicknellii Eggl. MA (E)
CRUN Crataegus uniflora Münchh. dwarf hawthorn NY (E), OH (E)
CRVI2 Crataegus viridis L. green hawthorn IN (T)
CRPO6 Crescentia portoricensis Britton higuero de sierra E PR (E)
CRPA9 Croomia pauciflora (Nutt.) Torr. croomia FL (E), GA (T)
CRIL2 Crossopetalum ilicifolium (Poir.) Kuntze Christmasberry FL (T)
CRRH Crossopetalum rhacoma Crantz maidenberry FL (T)
CRAV Crotalaria avonensis DeLaney & Wunderlin Avon Park rattlebox E FL (E)
CRPU5 Crotalaria purshii DC. Pursh's rattlebox TN (PX, E)
CRRO5 Crotalaria rotundifolia Walter ex J.F. Gmel. rabbitbells MD (E)
CRSA4 Crotalaria sagittalis L. arrowhead rattlebox NH (E), NY (E), RI (T), VT (T)
CRAL3 Croton alabamensis E.A. Sm. ex Chapm. Alabama croton TN (PX, E)
CRGL2 Croton glandulosus L. vente conmigo OH (T)
CRHU Croton humilis L. pepperbush FL (E)
CRWI2 Croton wigginsii L.C. Wheeler Wiggins' croton CA (R)
CRWI5 Croton willdenowii G.L. Webster Willdenow's croton
CREL2 Crotonopsis elliptica Willd. CT (SC), IN (E), PA (X)
CRCR7 Cryptantha crassipes I.M. Johnst. Terlingua Creek cryptantha E TX (E)
CRFL4 Cryptantha flaccida (Douglas ex Lehm.) Greene weakstem cryptantha
CRRO4 Cryptantha rostellata (Greene) Greene WA (S)
CRIN15 Cryptantha insolita (J.F. Macbr.) Payson Las Vegas cryptantha NV (FP)
CRLE6 Cryptantha leucophaea (Douglas ex Lehm.) Payson gray cryptantha WA (S)
CRRO3 Cryptantha roosiorum Munz bristlecone cryptantha CA (R)
CRSC2 Cryptantha scoparia A. Nelson Pinyon Desert cryptantha WA (S)
CRSP4 Cryptantha spiculifera (Piper) Payson Snake River cryptantha WA (S)
CRAC3 Cryptogramma acrostichoides R. Br. American rockbrake MI (E)
CRST2 Cryptogramma stelleri (S.G. Gmel.) Prantl fragile rockbrake CT (E), ME (T), MA (E), NH (T), NJ (E), NY (EV), PA (E), WA (S)
CRCA9 Cryptotaenia canadensis (L.) DC. Canadian honewort FL (E), ME (PX), RI (SC)
CTSL Ctenitis sloanei (Poepp. ex Spreng.) Morton Florida lacefern FL (E)
CTSQ Ctenitis squamigera (Hook. & Arn.) Copeland Pacific lacefern E
CTSU2 Ctenitis submarginalis (Langsd. & Fisch.) Ching brownhair lacefern FL (E)
CTFL Ctenium floridanum (Hitchc.) Hitchc. Florida orangegrass FL (E)
CUOK Cucurbita okeechobeensis (Small) L.H. Bailey Okeechobee gourd E FL (E)
CUGL Cupania glabra Sw. Florida toadwood FL (E)
CUAS Cuphea aspera Chapm. tropical waxweed FL (E)
CUVI Cuphea viscosissima Jacq. blue waxweed CT (SC)
CUCE Cuscuta cephalanthi Engelm. buttonbush dodder NJ (E), NY (E)
CUCO2 Cuscuta compacta Juss. ex Choisy compact dodder OH (PRX)
CUCO3 Cuscuta coryli Engelm. hazel dodder CT (SC), MD (E, X), OH (E), RI (H)
CUCU2 Cuscuta cuspidata Engelm. cusp dodder IN (X)
CUDE2 Cuscuta denticulata Engelm. desert dodder WA (S)
CUGL3 Cuscuta glomerata Choisy rope dodder OH (T)
CUHA Cuscuta harperi Small Harper's dodder GA (T)
CUIN Cuscuta indecora Choisy bigseed alfalfa dodder NJ (E)
CUOBG Cuscuta obtusiflora Kunth var. glandulosa Engelm. Peruvian dodder NY (E)
CUPE3 Cuscuta pentagona Engelm. fiveangled dodder NH (E), OH (E)
CUPO Cuscuta polygonorum Engelm. smartweed dodder MD (E), NY (E)
CURO Cuscuta rostrata Shuttlw. ex Engelm. & A. Gray beaked dodder MD (E)
CUDO3 Cusickiella douglasii (A. Gray) Rollins alkali cusickiella WA (T)
CYAC5 Cyanea acuminata (Gaudich.) Hillebr. Honolulu cyanea E
CYAS Cyanea asarifolia H. St. John gingerleaf cyanea E
CYCOC Cyanea copelandii Rock ssp. copelandii treetrunk cyanea E
CYCOH2 Cyanea copelandii Rock ssp. haleakalaensis (H. St. John) Lammers treetrunk cyanea E
CYCR9 Cyanea crispa (Gaudich.) Lammers, Givnish & Sytsma Koolau Range rollandia E
CYDU3 Cyanea dunbariae Rock ravine cyanea
CYDU2 Cyanea dunbarii Rock, orth. var. E
CYGL5 Cyanea glabra (E. Wimm.) H. St. John smooth cyanea E
CYGRG Cyanea grimesiana Gaudich. ssp. grimesiana splitleaf cyanea E
CYGRO Cyanea grimesiana Gaudich. ssp. obatae (H. St. John) Lammers splitleaf cyanea E
CYHAC Cyanea hamatiflora Rock ssp. carlsonii (Rock) Lammers Carlson's cyanea E
CYHAH Cyanea hamatiflora Rock ssp. hamatiflora wetforest cyanea E
CYHU2 Cyanea humboldtiana (Gaudich.) Lammers, Givnish & Sytsma Oahu rollandia E
CYKO4 Cyanea koolauensis Lammers, Givnish & Sytsma Palolo Valley rollandia E
CYLO5 Cyanea lobata H. Mann Waihee Valley cyanea E
CYLO12 Cyanea longiflora (Wawra) Lammers, Givnish & Systma ridge rollandia E
CYMAG Cyanea macrostegia Hillebr. ssp. gibsonii (Hillebr.) Lammers Gibson's cyanea E
CYMA12 Cyanea mannii (Brigham) Hillebr. Mann's cyanea E
CYMC Cyanea mceldowneyi Rock McEldowney's cyanea E
CYPI5 Cyanea pinnatifida (Cham.) E. Wimm. sharktail cyanea E
CYPL7 Cyanea platyphylla (A. Gray) Hillebr. puna cyanea E
CYPR8 Cyanea procera Hillebr. Molokai cyanea E
CYRE8 Cyanea recta (Wawra) Hillebr. Kealia cyanea T
CYRE10 Cyanea remyi Rock Remy's cyanea E
CYRI4 Cyanea rivularis Rock plateau cyanea
DERI4 Delissea rivularis (Rock) E. Wimm. E
CYSH Cyanea shipmanii Rock Shipman's cyanea E
CYST8 Cyanea st.-johnii (Hosaka) Lammers, Givnish & Systma St. John's rollandia E
CYST5 Cyanea stictophylla Rock Kaiholena cyanea E
CYSU8 Cyanea superba (Cham.) A. Gray Mt. Kaala cyanea E
CYTR7 Cyanea truncata (Rock) Rock Punaluu cyanea E
CYUN5 Cyanea undulata Forbes leechleaf cyanea E
CYHUJ Cycladenia humilis Benth. var. jonesii (Eastw.) S.L. Welsh & N.D. Atwood Jones' waxydogbane
CYJO2 Cycladenia jonesii Eastw. T
CYEL6 Cyclopogon elatus (Sw.) Schltr. tall ladies'-tresses
SPEL2 Spiranthes elata (Sw.) Rich. FL (E)
CYACA2 Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth var. acanthocarpa buckhorn cholla
OPACA Opuntia acanthocarpa Engelm. & Bigelow var. acanthocarpa AZ (SR)
CYACC2 Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth var. coloradensis (L.D. Benson) Pinkava Colorado buckhorn cholla
OPACC Opuntia acanthocarpa Engelm. & Bigelow var. coloradensis L.D. Benson AZ (SR), NV (CY)
CYACM Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth var. major (Engelm. & Bigelow) Pinkava buckhorn cholla
OPACM Opuntia acanthocarpa Engelm. & Bigelow var. major (Engelm. & Bigelow) L.D. Benson AZ (SR)
CYACT Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth var. thornberi (Thornb. & Bonker) Pinkava Thornber's buckhorn cholla
OPACT Opuntia acanthocarpa Engelm. & Bigelow var. thornberi (Thornb. & Bonker) L.D. Benson AZ (SR)
CYAR14 Cylindropuntia arbuscula (Engelm.) F.M. Knuth Arizona pencil cholla
OPAR2 Opuntia arbuscula Engelm. AZ (SR)
CYBI9 Cylindropuntia bigelovii (Engelm.) F.M. Knuth teddybear cholla
OPBI Opuntia bigelovii Engelm. AZ (SR), NV (CY)
CYEC3 Cylindropuntia echinocarpa (Engelm. & Bigelow) F.M. Knuth Wiggins' cholla
OPEC Opuntia echinocarpa Engelm. & Bigelow AZ (SR), NV (CY)
OPWI2 Opuntia wigginsii L.D. Benson AZ (SR)
CYFUF Cylindropuntia fulgida (Engelm.) F.M. Knuth var. fulgida jumping cholla
OPFUF Opuntia fulgida Engelm. var. fulgida AZ (SR)
CYFUM Cylindropuntia fulgida (Engelm.) F.M. Knuth var. mamillata (Schott ex Engelm.) Backeb. jumping cholla
OPFUM Opuntia fulgida Engelm. var. mamillata (Schott ex Engelm.) J.M. Coult. AZ (SR)
CYIMI Cylindropuntia imbricata (Haw.) F.M. Knuth var. imbricata tree cholla
OPIM Opuntia imbricata (Haw.) DC. AZ (SR)
CYKE4 Cylindropuntia ×kelvinensis (V.E. Grant & K.A. Grant) P.V. Heath [fulgida × spinosior]
OPKE Opuntia ×kelvinensis V.E. Grant & K.A. Grant AZ (SR)
CYLE8 Cylindropuntia leptocaulis (DC.) F.M. Knuth Christmas cactus
OPLE Opuntia leptocaulis DC. AZ (SR)
CYMU11 Cylindropuntia ×multigeniculata (Clokey) Backeb. (pro sp.) [echinocarpa × whipplei] Blue Diamond cholla
OPWHM Opuntia whipplei Engelm. & Bigelow var. multigeniculata (Clokey) L.D. Benson AZ (SR), NV (CY, FP)
CYRA9 Cylindropuntia ramosissima (Engelm.) F.M. Knuth branched pencil cholla
OPRA Opuntia ramosissima Engelm. AZ (SR), NV (CY)
CYSP8 Cylindropuntia spinosior (Engelm.) F.M. Knuth walkingstick cactus
OPSP2 Opuntia spinosior (Engelm.) Toumey AZ (SR)
CYTE15 Cylindropuntia ×tetracantha (Toumey) F.M. Knuth (pro sp.) [acanthocarpa × leptocaulis] Tucson pricklypear
OPKLT Opuntia kleiniae DC. var. tetracantha (Toumey) W.T. Marsh. AZ (SR)
CYVE3 Cylindropuntia versicolor (Engelm. ex J.M. Coult.) F.M. Knuth staghorn cholla
OPVE Opuntia versicolor Engelm. ex J.M. Coult. AZ (SR)
CYVI17 Cylindropuntia ×vivipara (Rose) F.M. Knuth (pro sp.) [arbuscula × versicolor]
OPVI4 Opuntia ×vivipara Rose (pro sp.) AZ (SR)
CYWH Cylindropuntia whipplei (Engelm. & Bigelow) F.M. Knuth Whipple cholla
OPWH Opuntia whipplei Engelm. & Bigelow AZ (SR), NV (CY)
CYFR4 Cymophyllus fraserianus (Ker Gawl.) Kartesz & Gandhi Fraser's cymophyllus GA (T), KY (E), MD (E), TN (SC)
CYFR Cymophyllus fraseri (Andrews) Mack. ex Britton PA (E)
CYBL Cynanchum blodgettii (A. Gray) Shinners Blodgett's swallow-wort FL (T)
CYLA Cynanchum laeve (Michx.) Pers. honeyvine PA (E)
CYVI Cynoglossum virginianum L. wild comfrey CT (SC), FL (E), ME (E)
CYVIB Cynoglossum virginianum L. var. boreale (Fernald) Cooperr. wild comfrey NJ (E), NY (E), OH (PRX), VT (T)
CYBO Cynoglossum boreale Fernald NH (E), PA (X)
CYVIV Cynoglossum virginianum L. var. virginianum wild comfrey NY (E)
CYDI2 Cynosciadium digitatum DC. finger dogshade IL (E)
CYAC2 Cyperus acuminatus Torr. & Hook. ex Torr. tapertip flatsedge IN (E), MI (PREX), MN (T), OH (E)
CYBI6 Cyperus bipartitus Torr. slender flatsedge WA (S)
CYDE2 Cyperus dentatus Torr. toothed flatsedge IN (E), MD (E, X), TN (SC)
CYDI3 Cyperus diandrus Torr. umbrella flatsedge PA (E), VT (E)
CYEC2 Cyperus echinatus (L.) Alph. Wood globe flatsedge NY (E)
CYER2 Cyperus erythrorhizos Muhl. redroot flatsedge ME (T)
CYFA3 Cyperus fauriei Kük. alpine flatsedge
MAFA7 Mariscus fauriei (Kük.) T. Koyama E
CYFL Cyperus flavescens L. yellow flatsedge NY (E)
CYFL6 Cyperus floridanus Britton Florida flatsedge FL (E)
CYFU2 Cyperus fuligineus Chapm. limestone flatsedge FL (E)
CYGR2 Cyperus grayi Torr. Gray's flatsedge NH (E)
CYGR11 Cyperus grayoides Mohlenbr. Illinois flatsedge IL (T)
CYHO Cyperus houghtonii Torr. Houghton's flatsedge IN (R), ME (PX), MA (E), NH (T), OH (PRX), PA (E), VT (T)
CYHY Cyperus hystricinus Fernald bristly flatsedge NJ (E)
CYLA3 Cyperus lancastriensis Porter ex A. Gray manyflower flatsedge IL (E), NJ (E), OH (E)
CYLUL Cyperus lupulinus (Spreng.) Marcks ssp. lupulinus Great Plains flatsedge NY (T)
CYOD Cyperus odoratus L. fragrant flatsedge RI (SC)
CYEN Cyperus engelmannii Steud. MA (T), PA (R), TN (SC)
CYPEP Cyperus pennatiformis Kük. var. pennatiformis coastal flatsedge
MAPE5 Mariscus pennatiformis (Kük.) T. Koyama E
CYPL3 Cyperus plukenetii Fernald Plukenet's flatsedge KY (H), MD (E, X), NJ (E), TN (SC)
CYPO Cyperus polystachyos Rottb. manyspike flatsedge NJ (E), PA (X)
CYPOT Cyperus polystachyos Rottb. var. texensis (Torr.) Fernald Texan flatsedge NY (E)
CYPS Cyperus pseudovegetus Steud. marsh flatsedge IN (R), NJ (E)
CYRE3 Cyperus refractus Engelm. ex Boeckeler reflexed flatsedge NJ (E), OH (E), PA (E)
CYRE4 Cyperus retrofractus (L.) Torr. rough flatsedge NJ (E)
CYDI11 Cyperus dipsaciformis Fernald OH (E)
CYRE5 Cyperus retrorsus Chapm. pine barren flatsedge NY (E), PA (X)
CYSC3 Cyperus schweinitzii Torr. Schweinitz's flatsedge NY (R), PA (R)
CYSQ Cyperus squarrosus L. bearded flatsedge RI (E)
CYAR3 Cyperus aristatus Rottb. ME (PX), NH (T)
CYTR2 Cyperus trachysanthos Hook. & Arn. sticky flatsedge E
CYAC3 Cypripedium acaule Aiton moccasin flower GA (U), IL (E), NY (EV), TN (CE, E)
CYAR5 Cypripedium arietinum W.T. Aiton ram's head lady's slipper CT (SC), ME (E), MA (E), MN (T), NH (E), NY (T), VT (T), WI (T)
CYCA5 Cypripedium candidum Muhl. ex Willd. white lady's slipper IL (T), IN (R), KY (E), MD (E), MI (T), NJ (E), NY (E), OH (E), PA (X), WI (T)
CYFA Cypripedium fasciculatum Kellogg ex S. Watson clustered lady's slipper WA (S)
CYKE2 Cypripedium kentuckiense C.F. Reed Kentucky lady's slipper KY (SC), TN (E)
CYPA19 Cypripedium parviflorum Salisb. lesser yellow lady's slipper CT (SC), IL (E), KY (T), NH (E), NY (E), PA (E), WA (E)
CYPAM3 Cypripedium parviflorum Salisb. var. makasin (Farw.) Sheviak greater yellow lady's slipper MA (E), NY (EV)
CYPAP4 Cypripedium parviflorum Salisb. var. parviflorum lesser yellow lady's slipper
CYCAP Cypripedium calceolus L. var. parviflorum (Salisb.) Fernald GA (U), IN (R), OH (E), RI (E)
CYPAP3 Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight greater yellow lady's slipper NY (EV)
CYCAP2 Cypripedium calceolus L. var. pubescens (Willd.) Correll AZ (HS), GA (U), NM (E), RI (E)
CYPU10 Cypripedium pubescens Willd. NH (T), PA (V)
CYRE6 Cypripedium reginae Walter showy lady's slipper AR (E), CT (E), IL (E), IA (T), KY (H), ME (T), MD (E, X), MA (SC), NH (E), NJ (E), NY (EV), OH (T), PA (T), TN (E)
CYCR4 Cyrtandra crenata H. St. John & Storey Kahana Valley cyrtandra E
CYCY3 Cyrtandra cyaneoides Rock mapele E
CYDE4 Cyrtandra dentata H. St. John & Storey mountain cyrtandra E
CYGI3 Cyrtandra giffardii Rock forest cyrtandra E
CYLI9 Cyrtandra limahuliensis H. St. John Limahuli cyrtandra T
CYMU5 Cyrtandra munroi Forbes Lanaihale cyrtandra E
CYPO4 Cyrtandra polyantha C.B. Clarke Niu Valley cyrtandra E
CYSU6 Cyrtandra subumbellata (Hillebr.) H. St. John & Storey parasol cyrtandra E
CYTI Cyrtandra tintinnabula Rock Laupahoehoe cyrtandra E
CYVI7 Cyrtandra viridiflora H. St. John & Storey greenleaf cyrtandra E
CYPU4 Cyrtopodium punctatum (L.) Lindl. cowhorn orchid FL (E)
CYBU3 Cystopteris bulbifera (L.) Bernh. bulblet bladderfern NY (EV)
CYFR2 Cystopteris fragilis (L.) Bernh. brittle bladderfern NY (EV), OH (PRX)
CYLA4 Cystopteris laurentiana (Weath.) Blasdell St. Lawrence bladderfern IL (E), PA (E)
CYPR4 Cystopteris protrusa (Weath.) Blasdell lowland bladderfern NY (E)
CYTE3 Cystopteris tennesseensis Shaver Tennessee bladderfern NC (SC, E)
CYTE7 Cystopteris tenuis (Michx.) Desv. upland brittle bladderfern NY (EV)
DAVI6 Dactylorhiza viridis (L.) R.M. Bateman, A.M. Pridgeon & M.W. Chase longbract frog orchid
COVI6 Coeloglossum viride (L.) Hartm. AZ (SR), MD (E), NY (EV), OH (E)
COVIV Coeloglossum viride (L.) Hartm. var. virescens (Muhl. ex Willd.) Luer CT (SC), IN (T), KY (H), RI (T), TN (E)
DABR2 Dalbergia brownei (Jacq.) Schinz Brown's Indian rosewood FL (E)
DACA7 Dalea candida Michx. ex Willd. white prairie clover TN (E)
DACA9 Dalea carthagenensis (Jacq.) J.F. Macbr. Cartagena prairie clover FL (E)
DAFO2 Dalea foliosa (A. Gray) Barneby leafy prairie clover E IL (E), TN (E)
DAPHM Dalea phleoides (Torr. & A. Gray) Shinners var. microphylla (Torr. & A. Gray) Barneby slimspike prairie clover AR (T)
DAPU5 Dalea purpurea Vent. purple prairie clover KY (SC), MI (PREX), OH (PRX), TN (E)
DATE4 Dalea tentaculoides Gentry Gentry's indigobush AZ (HS)
DAVI Dalea villosa (Nutt.) Spreng. silky prairie clover IA (E)
DAVIG Dalea villosa (Nutt.) Spreng. var. grisea (Torr. & A. Gray) Barneby silky prairie clover AR (E)
DARE Dalibarda repens L. robin runaway CT (E), MI (T), NJ (E), NC (E), OH (T), RI (E)
DACA12 Damasonium californicum Torr. ex Benth. California damsonium WA (S)
DACO Danthonia compressa Austin flattened oatgrass MI (E)
DAEP2 Danthonia epilis Scribn. Carolina oatgrass TN (SC)
DAHE2 Daphnopsis helleriana Urb. Heller's cieneguillo E PR (E)
DAFRF Dasiphora fruticosa (L.) Rydb. ssp. floribunda (Pursh) Kartesz shrubby cinquefoil
POFR4 Potentilla fruticosa auct. non L. IA (T), PA (E)
DAMA Dasistoma macrophylla (Nutt.) Raf. mullein foxglove MI (T)
DAWH2 Dasylirion wheeleri S. Watson common sotol AZ (SR)
DEVE Decodon verticillatus (L.) Elliot swamp loosestrife IA (E)
DEEU Dedeckera eurekensis Reveal & J.T. Howell July gold CA (R)
DEPU6 Deeringothamnus pulchellus Small royal false pawpaw E FL (E)
DERU Deeringothamnus rugelii (B.L. Rob.) Small Rugel's false pawpaw E FL (E)
DEAR8 Deinandra arida (D.D. Keck) B.G. Baldw. Red Rock tarweed
HEAR4 Hemizonia arida D.D. Keck CA (R)
DECO13 Deinandra conjugens (D.D. Keck) B.G. Baldw. Otay tarweed T
HECO8 Hemizonia conjugens D.D. Keck CA (E)
DEINV3 Deinandra increscens (H.M. Hall ex D.D. Keck) B.G. Baldw. ssp. villosa (Tanowitz) B.G. Baldw. Gaviota tarplant E
HEINV Hemizonia increscens (H.M. Hall ex D.D. Keck) Tanowitz ssp. villosa Tanowitz CA (E)
DEMI4 Deinandra minthornii (Jeps.) B.G. Baldw. Santa Susana tarweed
HEMI6 Hemizonia minthornii Jeps. CA (R)
DEMO5 Deinandra mohavensis (D.D. Keck) B.G. Baldw. Mojave tarweed
HEMO5 Hemizonia mohavensis D.D. Keck CA (E)
DERH2 Delissea rhytidosperma H. Mann Kauai delissea E
DESU Delissea subcordata Gaudich. Koolau Range delissea E
DEUN2 Delissea undulata Gaudich. leechleaf delissea E
DEBA Delphinium bakeri Ewan Baker's delphinium E CA (R)
DECA3 Delphinium carolinianum Walter Carolina larkspur FL (E), KY (T)
DEEX Delphinium exaltatum Aiton tall larkspur MD (E), NC (SC, E), PA (E), TN (E)
DEHEC Delphinium hesperium A. Gray ssp. cuyamacae (Abrams) F.H. Lewis & Epling foothill larkspur CA (R)
DELU Delphinium luteum A. Heller yellow larkspur E CA (R)
DENUO Delphinium nuttallii A. Gray ssp. ochroleucum (Nutt.) Warnock upland larkspur
DELE Delphinium leucophaeum Greene OR (E), WA (E)
DEPA4 Delphinium ×pavonaceum Ewan (pro sp.) [menziesii × trolliifolium] peacock larkspur OR (E)
DEVAK Delphinium variegatum Torr. & A. Gray ssp. kinkiense (Munz) Warnock royal larkspur E CA (E)
DEVI2 Delphinium viridescens Leiberg Wenatchee larkspur WA (T)
DELI8 Dendrophylax lindenii (Lindl.) Benth. ex Rolfe palmpolly
POLI3 Polyrrhiza lindenii (Lindl.) Cogn. FL (E)
DEBI3 Dennstaedtia bipinnata (Cav.) Maxon cuplet fern FL (E)
DEPU2 Dennstaedtia punctilobula (Michx.) T. Moore eastern hayscented fern IL (E), MI (PREX)
DEAC4 Deparia acrostichoides (Sw.) M. Kato silver false spleenwort NY (EV)
DEMO3 Dermatocarpon moulinsii (Mont.) Zahlbr. Moulins' silverskin lichen MN (E)
DECE Deschampsia cespitosa (L.) P. Beauv. tufted hairgrass IN (R), MD (E)
DECA18 Deschampsia caespitosa (L.) P. Beauv., orth. var. CT (SC)
DECEG2 Deschampsia cespitosa (L.) P. Beauv. ssp. glauca (C. Hartm.) C. Hartm. KY (E), MA (E)
DEFL Deschampsia flexuosa (L.) Trin. wavy hairgrass KY (T)
DEIN5 Descurainia incana (Bernh. ex Fisch. & C.A. Mey.) Dorn mountain tansymustard ME (PX)
DEPI Descurainia pinnata (Walter) Britton western tansymustard OH (T)
DEPIB Descurainia pinnata (Walter) Britton ssp. brachycarpa (Richardson) Detling western tansymustard NY (E)
DECI Desmodium ciliare (Muhl. ex Willd.) DC. hairy small-leaf ticktrefoil NY (T), RI (T)
DECU Desmodium cuspidatum (Muhl. ex Willd.) DC. ex D. Don largebract ticktrefoil MA (T), VT (E)
DEGL4 Desmodium glabellum (Michx.) DC. Dillenius' ticktrefoil CT (SC)
DEHU3 Desmodium humifusum (Muhl. ex Bigelow) Beck eastern trailing ticktrefoil CT (SC), IN (E), MD (E, X), MA (E), NJ (E), NY (E)
DEIL2 Desmodium illinoense A. Gray Illinois ticktrefoil OH (PRX)
DELA2 Desmodium laevigatum (Nutt.) DC. smooth ticktrefoil NY (E)
DELI2 Desmodium lineatum DC. sand ticktrefoil MD (E)
DEMA2 Desmodium marilandicum (L.) DC. smooth small-leaf ticktrefoil NH (E)
DENU5 Desmodium nuttallii (Schindl.) B.G. Schub. Nuttall's ticktrefoil NY (E)
DEOB5 Desmodium obtusum (Muhl. ex Willd.) DC. stiff ticktrefoil NY (E)
DERI3 Desmodium rigidum (Elliot) DC. MD (E), NH (E)
DEOC2 Desmodium ochroleucum M.A. Curtis ex Canby cream ticktrefoil FL (E), MD (E), TN (E)
DEPA7 Desmodium pauciflorum (Nutt.) DC. fewflower ticktrefoil MD (E), NJ (E), NY (E)
DERO3 Desmodium rotundifolium DC. prostrate ticktrefoil NH (T), VT (T)
DESE Desmodium sessilifolium (Torr.) Torr. & A. Gray sessileleaf ticktrefoil CT (SC), MD (E, X), NJ (E), OH (E), PA (X), RI (T)
DEST2 Desmodium strictum (Pursh) DC. pine barren ticktrefoil MD (E)
DISM3 Diamorpha smallii Britton ex Small elf orpine TN (E)
DILA Diapensia lapponica L. pincushion plant ME (SC), NH (T), NY (T), VT (E)
DIAM Diarrhena americana P. Beauv. American beakgrain MD (E), MI (T), WI (E)
DIOB3 Diarrhena obovata (Gleason) Brandenburg obovate beakgrain NY (E), PA (E)
DIAB2 Dibaeis absoluta (Tuck.) Kalb & Gierl
BAAB2 Baeomyces absolutus Tuck. OH (E)
DICA Dicentra canadensis (Goldie) Walp. squirrel corn CT (T), ME (T), NH (T), NJ (E)
DIEX Dicentra eximia (Ker Gawl.) Torr. turkey corn MD (T), NJ (E), PA (E)
DICH4 Dicerandra christmanii R.B. Huck & W.S. Judd Lake Wales balm E FL (E)
DICO5 Dicerandra cornutissima R.B. Huck longspur balm E FL (E)
DIFR Dicerandra frutescens Shinners scrub balm E FL (E)
DIIM Dicerandra immaculata Lakela spotless balm E FL (E)
DITH3 Dicerandra ×thinicola H.A. Mill. (pro sp.) [densiflora × sp.] FL (E)
DIAC Dichanthelium aciculare (Desv. ex Poir.) Gould & C.A. Clark needleleaf rosette grass
PAAC11 Panicum aciculare Desv. ex Poir. NJ (E), TN (E)
DIACF Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. fasciculatum (Torr.) Freckmann western panicgrass
PACU3 Panicum curtifolium Nash TN (E)
PASU6 Panicum subvillosum Ashe IN (X)
DIACL Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. lindheimeri (Nash) Gould & C.A. Clark Lindheimer panicgrass
PALI11 Panicum lindheimeri Nash OH (E)
DIACT2 Dichanthelium acuminatum (Sw.) Gould & C.A. Clark var. thermale (Bol.) Freckmann Geysers panicgrass
DILAT Dichanthelium lanuginosum (Elliot) Gould var. thermale (Bol.) Spellenb. CA (E)
DIBO Dichanthelium boreale (Nash) Freckmann northern panicgrass IA (E), KY (SC)
PABI7 Panicum bicknellii Nash IN (E), OH (T)
PABO8 Panicum boreale Nash IL (E), IN (R), MD (E, X), NJ (E), OH (T)
PACA19 Panicum calliphyllum Ashe OH (PRX)
DICO2 Dichanthelium commutatum (Schult.) Gould variable panicgrass
PAJO3 Panicum joorii Vasey IL (E)
DIDID Dichanthelium dichotomum (L.) Gould var. dichotomum cypress panicgrass
DIDIM Dichanthelium dichotomum (L.) Gould ssp. mattamuskeetense (Ashe) Freckmann & Lelong MA (E)
PAAN10 Panicum annulum Ashe IN (E), PA (E)
PALU4 Panicum lucidum Ashe IN (E), PA (E)
PAMA10 Panicum mattamuskeetense Ashe IN (X)
PANU7 Panicum nudicaule Vasey FL (T)
PAYA2 Panicum yadkinense Ashe IL (E), IN (T), OH (E)
DIDIE Dichanthelium dichotomum (L.) Gould var. ensifolium (Baldw. ex Elliot) Gould & C.A. Clark cypress panicgrass
PAEN3 Panicum ensifolium Baldw. ex Elliot TN (SC)
DIHI13 Dichanthelium hirstii (Swallen) Kartesz Hirst's panicgrass
PAHI10 Panicum hirstii Swallen GA (E), NJ (E), NC (E)
DILA9 Dichanthelium laxiflorum (Lam.) Gould openflower rosette grass
PALA15 Panicum laxiflorum Lam. PA (E)
DILE2 Dichanthelium leibergii (Vasey) Freckmann Leiberg's panicum
PALE7 Panicum leibergii (Vasey) Scribn. IN (T), MI (T), NY (E), OH (T), PA (X)
DILE4 Dichanthelium leucothrix (Nash) Freckmann rough panicgrass
PAACL2 Panicum acuminatum Sw. var. leucothrix (Nash) Lelong TN (SC)
DILI2 Dichanthelium linearifolium (Scribn. ex Nash) Gould slimleaf panicgrass IA (T)
PAPE10 Panicum perlongum Nash OH (E)
DIME2 Dichanthelium meridionale (Ashe) Freckmann matting rosette grass
PAME7 Panicum meridionale Ashe OH (T)
DIOLO Dichanthelium oligosanthes (Schult.) Gould var. oligosanthes Heller's rosette grass
PAOL2 Panicum oligosanthes Schult. NY (E)
DIOLS Dichanthelium oligosanthes (Schult.) Gould var. scribnerianum (Nash) Gould Scribner's rosette grass
PASC10 Panicum scoparium S. Watson ex Nash, non Lam. NY (E), PA (E)
DIOVA Dichanthelium ovale (Elliot) Gould & C.A. Clark var. addisonii (Nash) Gould & C.A. Clark Addison's rosette grass
PACO20 Panicum commonsianum Ashe OH (E), PA (X)
PACOA3 Panicum commonsianum Ashe var. addisonii (Nash) Pohl IN (R)
DIRA Dichanthelium ravenelii (Scribn. & Merr.) Gould Ravenel's rosette grass
PARA13 Panicum ravenelii Scribn. & Merr. IL (E)
DISAP Dichanthelium sabulorum (Lam.) Gould & C.A. Clark var. patulum (Scribn. & Merr.) Gould & C.A. Clark hemlock rosette grass
PACOE Panicum commonsianum Ashe var. euchlamydeum (Shinners) Pohl PA (E)
DISAT Dichanthelium sabulorum (Lam.) Gould & C.A. Clark var. thinium (Hitchc. & Chase) Gould & C.A. Clark hemlock rosette grass
PACO29 Panicum columbianum Scribn. IL (E), IN (R)
DISC2 Dichanthelium scabriusculum (Elliot) Gould & C.A. Clark woolly rosette grass MA (T)
PASC8 Panicum scabriusculum Elliot CT (E), MD (E), NY (E)
DISC3 Dichanthelium scoparium (Lam.) Gould velvet panicum
PASC9 Panicum scoparium Lam. IN (E)
DISPI Dichanthelium sphaerocarpon (Elliot) Gould var. isophyllum (Scribn.) Gould & C.A. Clark roundseed panicgrass
PAPO4 Panicum polyanthes Schult. MI (E)
DISPS3 Dichanthelium sphaerocarpon (Elliot) Gould var. sphaerocarpon roundseed panicgrass
PASP8 Panicum sphaerocarpon Elliot CT (SC), NH (E)
DISP4 Dichanthelium spretum (Schult.) Freckmann Eaton's rosette grass
PAACD Panicum acuminatum Sw. var. densiflorum (Rand & Redf.) Lelong TN (E)
PASP9 Panicum spretum Schult. OH (E), PA (E)
DIVIP Dichanthelium villosissimum (Nash) Freckmann var. praecocius (Hitchc. & Chase) Freckmann whitehair rosette grass
PAPR11 Panicum praecocius Hitchc. & Chase OH (E)
DIVIV Dichanthelium villosissimum (Nash) Freckmann var. villosissimum whitehair rosette grass
DIOVP Dichanthelium ovale (Elliot) Gould & C.A. Clark ssp. pseudopubescens (Nash) Freckmann & Lelong MA (SC)
PAVI8 Panicum villosissimum Nash OH (PRX)
DIWI5 Dichanthelium wilcoxianum (Vasey) Freckmann fall rosette grass
PAWI5 Panicum wilcoxianum Vasey IN (R)
DIWR3 Dichanthelium wrightianum (Scribn.) Freckmann Wright's rosette grass MA (SC)
PAWR7 Panicum wrightianum Scribn. MD (E), NY (E), RI (SC)
DIXA Dichanthelium xanthophysum (A. Gray) Freckmann slender rosette grass
PAXA4 Panicum xanthophysum A. Gray CT (SC), NJ (E), PA (E)
DICAP Dichelostemma capitatum (Benth.) Alph. Wood ssp. pauciflorum (Torr.) G. Keator bluedicks
DIPUP Dichelostemma pulchellum (Salisb.) A. Heller var. pauciflorum (Torr.) Hoover AZ (SR)
DIBR2 Dicliptera brachiata (Pursh) Spreng. branched foldwing IN (E)
DIAS5 Dicranodontium asperulum (Mitt.) Broth. dicranodontium moss KY (E)
DIDI Didiplis diandra (Nutt. ex DC.) Alph. Wood waterpurslane IN (R), KY (SC), TN (T)
DIER3 Diellia erecta Brack. erect island spleenwort E
DIFA Diellia falcata Brack. sickle island spleenwort E
DIPA25 Diellia pallida W.H. Wagner pale island spleenwort E
DIUN3 Diellia unisora W.H. Wagner singlesorus island spleenwort E
DILO Diervilla lonicera Mill. northern bush honeysuckle IN (R), TN (T)
DIRI Diervilla rivularis Gattinger mountain bush honeysuckle
DISER Diervilla sessilifolia Buckley var. rivularis (Gattinger) H.E. Ahles TN (T)
DICO6 Digitaria cognata (Schult.) Pilg. fall witchgrass PA (T)
DIDO Digitaria dolichophylla Henr. Caribbean crabgrass FL (T)
DIFI Digitaria filiformis (L.) Koeler slender crabgrass MI (PREX), NY (T), OH (PRX)
DIPA5 Digitaria pauciflora Hitchc. twospike crabgrass FL (E)
DIVI Digitaria villosa (Walter) Pers. shaggy crabgrass MD (E, X)
DIMU Dioclea multiflora (Torr. & A. Gray) C. Mohr Boykin's clusterpea
GAMO4 Galactia mohlenbrockii R.H. Maxwell IL (E)
DIVI3 Diodia virginiana L. Virginia buttonweed IN (T), NJ (E)
DIMU4 Dionaea muscipula Ellis Venus flytrap NC (SC)
DIVI5 Diospyros virginiana L. common persimmon CT (SC), NY (T)
DICU4 Diphyscium cumberlandianum Harvill Cumberland diphyscium moss OH (E)
DIMO4 Diplazium molokaiense W.J. Rob. Molokai twinsorus fern E
DIPY Diplazium pycnocarpon (Spreng.) Broun glade fern CT (E), MD (T), MN (T), NH (E), NY (EV)
ATPY Athyrium pycnocarpon (Spreng.) Tidestr. NJ (E)
DIPA9 Dirca palustris L. eastern leatherwood FL (E), MD (T)
DISP Distichlis spicata (L.) Greene saltgrass PA (X)
DIMA6 Dithyrea maritima (Davidson) Davidson beach shieldpod CA (T)
DOLE Dodecahema leptoceras (A. Gray ex Benth.) Reveal & Hardham slenderhorn spineflower E CA (E)
DOALM Dodecatheon alpinum (A. Gray) Greene ssp. majus H.J. Thomp. alpine shootingstar AZ (SR)
DOAM Dodecatheon amethystinum (Fassett) Fassett jeweled shootingstar IA (T), PA (T)
DOAU Dodecatheon austrofrigidum ?, ined. tundra shootingstar WA (T)
DODEE Dodecatheon dentatum Hook. ssp. ellisiae (Standl.) H.J. Thomp. Ellis' shootingstar AZ (SR)
DOFR2 Dodecatheon frenchii (Vasey) Rydb. French's shootingstar AR (T), IN (R), KY (SC)
DOME Dodecatheon meadia L. pride of Ohio FL (E), MI (E), MN (E), PA (E)
DOPU Dodecatheon pulchellum (Raf.) Merr. darkthroat shootingstar AZ (SR)
DOVI Dodonaea viscosa (L.) Jacq. Florida hopbush
DOEL3 Dodonaea elaeagnoides J.H. Rudolph ex Ledeb. & Alderstam FL (E)
DOIN2 Doellingeria infirma (Michx.) Greene cornel-leaf whitetop MA (E)
ASIN2 Aster infirmus Michx. RI (H)
DOCOB Downingia concolor Greene var. brevior McVaugh maroonspot calicoflower CA (E)
DRAP2 Draba aprica Beadle openground draba AR (T), GA (E)
DRAR Draba arabisans Michx. rock draba ME (T), NY (T)
DRAU Draba aurea Vahl ex Hornem. golden draba WA (S)
DRBR Draba brachycarpa Nutt. ex Torr. & A. Gray shortpod draba OH (E)
DRBRC Draba breweri S. Watson var. cana (Rydb.) Rollins cushion draba
DRCA4 Draba cana Rydb. ME (E), MI (T), VT (T), WA (S)
DRLA2 Draba lanceolata auct. non Royle NH (E), WI (E)
DRCU Draba cuneifolia Nutt. ex Torr. & A. Gray wedgeleaf draba IL (E), KY (E), OH (T), TN (SC)
DRGL Draba glabella Pursh smooth draba MI (E), NY (E), VT (T)
DRIN Draba incana L. twisted draba MI (T)
DRJU2 Draba juvenilis Kom. longstalk draba
DRLO2 Draba longipes Raup WA (S)
DRNE Draba nemorosa L. woodland draba MI (PREX)
DRNO5 Draba norvegica Gunnerus Norwegian draba MN (E)
DRRA Draba ramosissima Desv. branched draba TN (SC)
DRRE2 Draba reptans (Lam.) Fernald Carolina draba CT (SC), MI (T), NJ (E), NY (T), OH (T), PA (X), RI (H)
DRPA2 Dracocephalum parviflorum Nutt. American dragonhead NY (E), VT (T)
DRAP3 Drepanolejeunea appalachiana R.M. Schust. TN (SC)
DRAN Drosera anglica Huds. English sundew ME (E), WI (T)
DRBR3 Drosera brevifolia Pursh dwarf sundew KY (E), TN (T)
DRCA2 Drosera capillaris Poir. pink sundew MD (E), TN (T)
DRFI Drosera filiformis Raf. threadleaf sundew CT (SC), FL (E), NY (R), RI (H)
DRIN3 Drosera intermedia Hayne spoonleaf sundew FL (T), IL (T), IN (R), KY (H), NY (EV), OH (E)
DRLI Drosera linearis Goldie slenderleaf sundew ME (E), WI (T)
DRRO Drosera rotundifolia L. roundleaf sundew IL (E), IA (E), NY (EV), TN (T)
DRDR Dryas drummondii Richardson ex Hook. Drummond's mountain-avens WA (S)
DRAU5 Dryopteris ×australis (Wherry) Small (pro sp.) [celsa × ludoviciana] TN (SC)
DRCA3 Dryopteris campyloptera Clarkson mountain woodfern CT (E), MD (E), NY (EV), PA (E)
DRCA11 Dryopteris carthusiana (Vill.) H.P. Fuchs spinulose woodfern AR (T), KY (SC), NY (EV), TN (T)
DRCE Dryopteris celsa (Wm. Palmer) Knowlt., Palmer & Pollard ex Small log fern IL (E), IN (X), MD (T), MI (T), NY (E), OH (E), PA (E)
DRCL Dryopteris clintoniana (D.C. Eaton) Dowell Clinton's woodfern IN (X), NY (EV), OH (E), PA (T)
DRCR4 Dryopteris cristata (L.) A. Gray crested woodfern NY (EV), TN (T), WA (S)
DRFI2 Dryopteris filix-mas (L.) Schott male fern ME (E), VT (T)
DRFR Dryopteris fragrans (L.) Schott fragrant woodfern ME (SC), NH (T), NY (E)
DRGO Dryopteris goldiana (Hook. ex Goldie) A. Gray Goldie's woodfern CT (SC), ME (SC), NH (T), NY (EV)
DRIN5 Dryopteris intermedia (Muhl. ex Willd.) A. Gray intermediate woodfern IA (T), NY (EV)
DRLU Dryopteris ludoviciana (Kunze) Small southern woodfern KY (H)
DRMA4 Dryopteris marginalis (L.) A. Gray marginal woodfern IA (T), MN (T), NY (EV)
DRDI Drypetes diversifolia Krug & Urb. milkbark FL (E)
DRLA3 Drypetes lateriflora (Sw.) Krug & Urb. guiana plum FL (T)
DUHE Dubautia herbstobatae G.D. Carr Keaau Valley dubautia E
DULA3 Dubautia latifolia (A. Gray) D.D. Keck koholapehu E
DUPA5 Dubautia pauciflorula H. St. John & G.D. Carr Wahiawa Bog dubautia E
DUPLH Dubautia plantaginea Gaudich. ssp. humilis G.D. Carr plantainleaf dubautia E
DUABP Dudleya abramsii Rose ssp. parva (Rose & Davidson) Bartel Conejo dudleya T
DUBLB2 Dudleya blochmaniae (Eastw.) Moran ssp. brevifolia (Moran) Moran shortleaf liveforever CA (E)
DUCO Dudleya collomiae Rose ex Morton Gila County liveforever
DUSAC Dudleya saxosa (M.E. Jones) Britton & Rose ssp. collomiae (Rose ex Morton) Moran AZ (SR)
DUCYM Dudleya cymosa (Lem.) Britton & Rose ssp. marcescens Moran marcescent dudleya T CA (R)
DUCYO Dudleya cymosa (Lem.) Britton & Rose ssp. ovatifolia (Britton) Moran Santa Monica Mountains dudleya T
DUNE Dudleya nesiotica (Moran) Moran Santa Cruz Island liveforever T CA (R)
DUPUA2 Dudleya pulverulenta (Nutt.) Britton & Rose ssp. arizonica (Rose) Moran chalk dudleya AZ (SR)
DUSE Dudleya setchellii (Jeps.) Britton & Rose Santa Clara Valley liveforever E
DUST Dudleya stolonifera Moran Laguna Beach liveforever T CA (R)
DUTR Dudleya traskiae (Rose) Moran Santa Barbara Island liveforever E CA (E)
DUVE Dudleya verityi K.M. Nakai Verity's liveforever T
EANI Eatonella nivea (D.C. Eaton) A. Gray white false tickhead WA (T)
ECFL Echeandia flavescens (Schult. & Schult. f.) Cruden Torrey's craglily AZ (SR)
ECLA Echinacea laevigata (C.L. Boynt. & Beadle) S.F. Blake smooth purple coneflower E GA (E), NC (SC, E), PA (X)
ECPA Echinacea pallida (Nutt.) Nutt. pale purple coneflower TN (T), WI (T)
ECPA2 Echinacea paradoxa (J.B.S. Norton) Britton Bush's purple coneflower AR (T)
ECPU Echinacea purpurea (L.) Moench eastern purple coneflower FL (E), MI (PREX)
ECSA Echinacea sanguinea Nutt. sanguin purple coneflower AR (T)
ECSI Echinacea simulata R.L. McGregor wavyleaf purple coneflower TN (T)
ECTE3 Echinacea tennesseensis (Beadle) Small Tennessee purple coneflower E TN (E)
ECHO Echinocactus horizonthalonius Lem. devilshead AZ (SR)
ECHON Echinocactus horizonthalonius Lem. var. nicholii L.D. Benson Nichol's echinocactus E AZ (HS)
ECPOP Echinocactus polycephalus Engelm. & Bigelow var. polycephalus cottontop cactus AZ (SR), NV (CY)
ECPOX Echinocactus polycephalus Engelm. & Bigelow var. xeranthemoides J.M. Coult. cottontop cactus AZ (SR), NV (CY)
ECBO2 Echinocereus bonkerae Thornb. & Bonker pinkflower hedgehog cactus
ECFAB Echinocereus fasciculatus (Engelm. ex B.D. Jacks.) L.D. Benson var. bonkerae (Thornb. & Bonker) L.D. Benson AZ (SR)
ECBO3 Echinocereus boyce-thompsonii Orcutt Boyce Thompson hedgehog cactus
ECFAB2 Echinocereus fasciculatus (Engelm. ex B.D. Jacks.) L.D. Benson var. boyce-thompsonii (Orcutt) L.D. Benson AZ (SR)
ECFEB2 Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage var. boyce-thompsonii (Orcutt) L.D. Benson AZ (SR)
ECCH2 Echinocereus chisoensis W.T. Marsh. Chisos Mountain hedgehog cactus T TX (T)
ECCOA Echinocereus coccineus Engelm. var. arizonicus (Rose ex Orcutt) D.J. Ferguson Arizona hedgehog cactus
ECTRA Echinocereus triglochidiatus Engelm. var. arizonicus (Rose ex Orcutt) L.D. Benson E AZ (HS)
ECTRN Echinocereus triglochidiatus Engelm. var. neomexicanus auct. non (Standl.) W.T. Marsh. AZ (SR)
ECCOC Echinocereus coccineus Engelm. var. coccineus scarlet hedgehog cactus
ECTRM Echinocereus triglochidiatus Engelm. var. melanacanthus (Engelm.) L.D. Benson AZ (SR)
ECDA Echinocereus dasyacanthus Engelm. spiny hedgehog cactus
ECPEN Echinocereus pectinatus (Scheidw.) Engelm. var. neomexicanus (J.M. Coult.) L.D. Benson AZ (SR)
ECEN Echinocereus engelmannii (Parry ex Engelm.) Lem. Engelmann's hedgehog cactus NV (CY)
ECENA Echinocereus engelmannii (Parry ex Engelm.) Lem. var. acicularis L.D. Benson Engelmann's hedgehog cactus AZ (SR)
ECENA2 Echinocereus engelmannii (Parry ex Engelm.) Lem. var. armatus L.D. Benson Engelmann's hedgehog cactus AZ (SR)
ECENC Echinocereus engelmannii (Parry ex Engelm.) Lem. var. chrysocentrus (Engelm. & Bigelow) Rümpler Engelmann's hedgehog cactus AZ (SR)
ECENE Echinocereus engelmannii (Parry ex Engelm.) Lem. var. engelmannii Engelmann's hedgehog cactus AZ (SR)
ECENV Echinocereus engelmannii (Parry ex Engelm.) Lem. var. variegatus (Engelm. & Bigelow) Rümpler Engelmann's hedgehog cactus AZ (SR)
ECFA Echinocereus fasciculatus (Engelm. ex B.D. Jacks.) L.D. Benson pinkflower hedgehog cactus AZ (SR)
ECFEF3 Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage ssp. fendleri pinkflower hedgehog cactus
ECFEF2 Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage var. fendleri AZ (SR)
ECFEK Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage var. kuenzleri (Castetter, Pierce & Schwerin) L.D. Benson E NM (E)
ECFER4 Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage ssp. rectispinus (Peebles) N.P. Taylor pinkflower hedgehog cactus
ECFER Echinocereus fendleri (Engelm.) Sencke ex J.N. Haage var. rectispinus (Peebles) L.D. Benson AZ (SR)
ECLE2 Echinocereus ledingii Peebles Leding's hedgehog cactus AZ (SR)
ECMO Echinocereus mojavensis (Engelm. & Bigelow) Rümpler Mojave kingcup cactus
ECTRM2 Echinocereus triglochidiatus Engelm. var. mojavensis (Engelm. & Bigelow) L.D. Benson AZ (SR)
ECNI Echinocereus nicholii (L.D. Benson) Parfitt Nichol's hedgehog cactus AZ (SR)
ECPO6 Echinocereus polyacanthus Engelm. Mojave mound cactus AZ (SR)
ECPS Echinocereus pseudopectinatus (N.P. Taylor) N.P. Taylor devilthorn AZ (SR)
ECREF2 Echinocereus reichenbachii (Terscheck ex Walp.) hort ex Haage ssp. fitchii (Britton & Rose) N.P. Taylor Fitch's hedgehog cactus
ECREA Echinocereus reichenbachii (Terscheck ex Walp.) hort ex Haage var. albertii L.D. Benson E TX (E)
ECRI3 Echinocereus rigidissimus (Engelm.) hort ex F. Haage rainbow hedgehog cactus AZ (SR)
ECRO2 Echinocereus ×roetteri (Engelm.) Rümpler [coccineus × dasyacanthus] Lloyd's hedgehog cactus
ECLL Echinocereus ×lloydii Britton & Rose (pro sp.) NM (E)
ECTR Echinocereus triglochidiatus Engelm. kingcup cactus NV (CY)
ECTRT Echinocereus triglochidiatus Engelm. var. triglochidiatus kingcup cactus AZ (SR)
ECTRG Echinocereus triglochidiatus Engelm. var. gonacanthus (Engelm. & Bigelow) Boissev. AZ (SR)
ECVID Echinocereus viridiflorus Engelm. var. davisii (A.D. Houghton) W.T. Marsh. Davis' hedgehog cactus E TX (E)
ECWA Echinochloa walteri (Pursh) A. Heller coast cockspur grass PA (E)
ECBE2 Echinodorus berteroi (Spreng.) Fassett upright burhead IN (X), KY (T)
ECRO Echinodorus rostratus (Nutt.) Engelm. OH (E), TN (SC)
ECCO3 Echinodorus cordifolius (L.) Griseb. creeping burhead IN (X), MD (E)
ECFL4 Echinodorus floridanus Haynes & Burkhalter Florida burhead FL (E)
ECTE2 Echinodorus tenellus (Mart. ex Schult. f.) Buchenau mudbabies IL (E), MI (E)
ECPA6 Echinodorus parvulus Engelm. IN (E), KY (E)
ECTEP Echinodorus tenellus (Mart. ex Schult. f.) Buchenau var. parvulus (Engelm.) Fassett CT (E)
ECER2 Echinomastus erectocentrus (J.M. Coult.) Britton & Rose redspine fishhook cactus AZ (SR)
ECERA Echinomastus erectocentrus (J.M. Coult.) Britton & Rose var. acunensis (W.T. Marsh.) H. Bravo AZ (HS)
ECIN2 Echinomastus intertextus (Engelm.) Britton & Rose white fishhook cactus AZ (SR)
ECJO3 Echinomastus johnsonii (Parry ex Engelm.) E.M. Baxter Johnson's fishhook cactus AZ (SR)
NEJO Neolloydia johnsonii (Parry ex Engelm.) L.D. Benson NV (CY)
ECMA2 Echinomastus mariposensis Hester Lloyd's fishhook cactus T
NEMA2 Neolloydia mariposensis (Hester) L.D. Benson TX (T)
ECPR Eclipta prostrata (L.) L. false daisy NY (E)
ELSE2 Elaphoglossum serpens Maxon & Morton ex Maxon cerro de punta jayuya E PR (E)
ELAM3 Elatine americana (Pursh) Arn. American waterwort MA (E), NY (E), PA (E)
ELTRA4 Elatine triandra Schkuhr var. americana (Pursh) Fassett RI (SC)
ELMI Elatine minima (Nutt.) Fisch. & C.A. Mey. small waterwort MD (E), PA (R)
ELTR Elatine triandra Schkuhr threestamen waterwort OH (PRX)
ELAL Eleocharis albida Torr. white spikerush MD (E)
ELAT Eleocharis atropurpurea (Retz.) J. Presl & C. Presl purple spikerush MI (E), WA (PX)
ELBR Eleocharis brittonii Svens. ex Small Britton's spikerush NJ (E)
ELCO2 Eleocharis compressa Sull. flatstem spikerush MD (E), MI (T), NJ (E), PA (E)
ELDI2 Eleocharis diandra C. Wright Wright's spikerush MA (E)
ELEL4 Eleocharis elliptica Kunth elliptic spikerush PA (E)
ELEN Eleocharis engelmannii Steud. Engelmann's spikerush ME (PX), NY (E), OH (E)
ELEQ Eleocharis equisetoides (Elliot) Torr. jointed spikesedge CT (E), IN (E), MD (E), NJ (E), NY (T), RI (SC), TN (E)
ELFA Eleocharis fallax Weath. creeping spikerush NY (E), RI (H)
ELGE Eleocharis geniculata (L.) Roem. & Schult. Canada spikesedge IN (T)
ELCA2 Eleocharis caribaea (Rottb.) S.F. Blake MI (T), OH (E), PA (E)
ELHA2 Eleocharis halophila (Fernald & Brack.) Fernald & Brack. saltmarsh spikerush MD (E), NH (T), NY (T), NC (T)
ELIN Eleocharis intermedia Schult. matted spikerush MD (E), MA (T), PA (T), TN (SC)
ELLA Eleocharis lanceolata Fernald daggerleaf spikerush TN (SC)
ELME Eleocharis melanocarpa Torr. blackfruit spikerush IN (T), MD (E), NJ (E), RI (E)
ELMI2 Eleocharis microcarpa Torr. smallfruit spikerush IN (E), MI (E)
ELMIF Eleocharis microcarpa Torr. var. filiculmis Torr. CT (SC), MA (E)
ELMI3 Eleocharis minima Kunth small spikerush NJ (E)
ELNI Eleocharis nitida Fernald quill spikerush MI (E), MN (T), WI (E)
ELOB2 Eleocharis obtusa (Willd.) Schult. blunt spikerush
ELOBP Eleocharis obtusa (Willd.) Schult. var. peasei Svens. PA (E)
ELOL Eleocharis olivacea Torr. bright green spikerush IL (E), KY (SC), MN (T), OH (T), PA (R)
ELOV Eleocharis ovata (Roth) Roem. & Schult. ovate spikerush MA (E), OH (E)
ELOBO Eleocharis obtusa (Willd.) Schult. var. ovata (Roth) Drapalik & Mohlenbr. NY (E)
ELPA5 Eleocharis parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer dwarf spikerush MI (T), NH (T), OH (E), PA (E)
ELQU Eleocharis quadrangulata (Michx.) Roem. & Schult. squarestem spikerush NY (E), PA (E), WI (E)
ELQUC Eleocharis quadrangulata (Michx.) Roem. & Schult. var. crassior Fernald CT (E)
ELQU2 Eleocharis quinqueflora (Hartmann) O. Schwarz fewflower spikerush ME (E), MA (E)
ELPA6 Eleocharis pauciflora (Lightf.) Link IL (E), NJ (E), OH (T), VT (T)
ELPAF Eleocharis pauciflora (Lightf.) Link var. fernaldii Svens. NH (E), PA (E)
ELRA Eleocharis radicans (A. Dietr.) Kunth rooted spikerush MI (PREX)
ELRO Eleocharis robbinsii Oakes Robbins' spikerush IN (R), MD (E), PA (T)
ELRO2 Eleocharis rostellata (Torr.) Torr. beaked spikerush FL (E), IL (T), ME (PX), MN (T), PA (E), RI (SC), WA (S), WI (T)
ELTEP Eleocharis tenuis (Willd.) Schult. var. pseudoptera (Weath. ex Svens.) Svens. slender spikerush
ELELP2 Eleocharis elliptica Kunth var. pseudoptera (Weath. ex Svens.) L.J. Harms NY (E)
ELTEV Eleocharis tenuis (Willd.) Schult. var. verrucosa (Svens.) Svens. slender spikerush NJ (E), PA (E)
ELTO Eleocharis tortilis (Link) Schult. twisted spikerush NJ (E), TN (SC)
ELTR5 Eleocharis tricostata Torr. three-angle spikerush MD (E, X), MA (E), MI (T), NY (E), PA (X), RI (E)
ELTU Eleocharis tuberculosa (Michx.) Roem. & Schult. cone-cup spikerush ME (E), NH (E), NY (T), PA (X)
ELWO Eleocharis wolfii (A. Gray) A. Gray ex Britton Wolf's spikerush IN (R), MN (E), OH (E), TN (SC)
ELCA3 Elephantopus carolinianus Raeusch. Carolina elephantsfoot NJ (E), PA (E)
ELTO2 Elephantopus tomentosus L. devil's grandmother MD (E)
ELRA2 Elliottia racemosa Muhl. ex Elliot georgiaplume GA (T)
ELNY Ellisia nyctelea (L.) L. Aunt Lucy NJ (E), PA (T)
ELNU2 Elodea nuttallii (Planch.) H. St. John western waterweed KY (T), TN (SC)
ELSC Elodea schweinitzii (Planch.) Caspary Schweinitz's waterweed PA (X)
ELCA18 Eltroplectris calcarata (Sw.) Garay & H.R. Sweet longclaw orchid FL (E)
ELHY Elymus hystrix L. eastern bottlebrush grass ME (T)
ELLAP Elymus lanceolatus (Scribn. & J.G. Sm.) Gould ssp. psammophilus (J.M. Gillett & H. Senn) Á. Löve Great Lakes wheatgrass WI (T)
ELSV Elymus svensonii Church Svenson's wildrye KY (SC), TN (E)
ELTR7 Elymus trachycaulus (Link) Gould ex Shinners slender wheatgrass NJ (E), OH (T)
ELTRS Elymus trachycaulus (Link) Gould ex Shinners ssp. subsecundus (Link) Á. Löve & D. Löve slender wheatgrass CT (SC)
ELTRT Elymus trachycaulus (Link) Gould ex Shinners ssp. trachycaulus slender wheatgrass
AGTR Agropyron trachycaulum (Link) Malte ex H.F. Lewis MD (E, X)
ELVI Elymus villosus Muhl. ex Willd. hairy wildrye MA (E), RI (SC)
ELWI Elymus wiegandii Fernald Wiegand's wildrye CT (SC)
EMEA Empetrum eamesii Fernald & Wiegand purple crowberry MN (E)
EMEAA Empetrum eamesii Fernald & Wiegand ssp. atropurpureum (Fernald & Wiegand) D. Löve purple crowberry NY (E)
EMAT Empetrum atropurpureum Fernald & Wiegand NH (T)
EMNI Empetrum nigrum L. black crowberry MI (T), MN (E)
EMNIH Empetrum nigrum L. ssp. hermaphroditum (Lange ex Hagerup) Böcher black crowberry NY (R)
ENNUC Enceliopsis nudicaulis (A. Gray) A. Nelson var. corrugata Cronquist nakedstem sunray T NV (FP)
ENTA Encyclia tampensis (Lindl.) Small Tampa butterfly orchid FL (CE)
ENBI Enemion biternatum Raf. eastern false rue anemone
ISBI2 Isopyrum biternatum (Raf.) Torr. & A. Gray FL (E)
ENBR3 Entodon brevisetus (Hook. & Wilson) Lindb. entodon moss KY (E)
ENCO70 Entodon concinnus (De Not.) Par. entodon moss TN (SC)
EPAC Epidendrum acunae Dressler Acuna's star orchid FL (E)
EPAM3 Epidendrum amphistomum A. Rich. big-mouth star orchid
EPAN7 Epidendrum anceps auct. non Jacq. FL (E)
EPBO4 Epidendrum boricuarum Hágsater & Sánchez fleshy star orchid
EPDI Epidendrum difforme auct. non Jacq. FL (E)
EPMAM Epidendrum magnoliae Muhl. var. magnoliae green fly orchid
EPCO4 Epidendrum conopseum W.T. Aiton FL (CE), GA (U)
EPNO Epidendrum nocturnum Jacq. night scented orchid FL (E)
EPRI2 Epidendrum rigidum Jacq. stiff flower star orchid FL (E)
EPST2 Epidendrum strobiliferum Rchb. f. big cypress star orchid FL (E)
EPRE2 Epigaea repens L. trailing arbutus FL (E), NY (EV)
EPAN4 Epilobium anagallidifolium Lam. pimpernel willowherb ME (E)
EPCI Epilobium ciliatum Raf. fringed willowherb IN (E), MD (E), NH (T), TN (SC)
EPCIG Epilobium ciliatum Raf. ssp. glandulosum (Lehm.) Hoch & P.H. Raven fringed willowherb NY (E)
EPHO Epilobium hornemannii Rchb. Hornemann's willowherb ME (E), NH (T), NY (E)
EPLE2 Epilobium leptophyllum Raf. bog willowherb TN (T)
EPPA Epilobium palustre L. marsh willowherb RI (T)
EPST Epilobium strictum Muhl. ex Spreng. downy willowherb IL (T), MD (E), OH (T), PA (E)
EPGI Epipactis gigantea Douglas ex Hook. stream orchid AZ (SR)
EPMI2 Epithelantha micromeris (Engelm.) F.A.C. Weber ex Britton & Rose pingpong-ball cactus AZ (SR)
EQFE Equisetum ×ferrissii Clute (pro sp.) [hyemale × laevigatum] PA (E)
EQFL Equisetum fluviatile L. water horsetail MD (E), RI (SC)
EQHYA Equisetum hyemale L. var. affine (Engelm.) A.A. Eaton scouringrush horsetail
EQHYA2 Equisetum hyemale L. ssp. affine (Engelm.) Calder & Roy L. Taylor RI (SC)
EQLA Equisetum laevigatum A. Braun smooth horsetail NY (E)
EQPA Equisetum palustre L. marsh horsetail CT (SC), NH (T), NY (T), VT (T)
EQPR Equisetum pratense Ehrh. meadow horsetail CT (SC), IL (T), NH (T), NJ (E), NY (T)
EQSC Equisetum scirpoides Michx. dwarf scouringrush CT (E), IL (E), MA (SC)
EQSY Equisetum sylvaticum L. woodland horsetail IL (E), IA (T), MD (E), RI (SC)
EQTE Equisetum telmateia Ehrh. giant horsetail MI (PREX)
EQVA Equisetum variegatum Schleich. ex F. Weber & D. Mohr variegated scouringrush IN (E), ME (SC), NJ (E), OH (T), PA (E)
ERCA Eragrostis capillaris (L.) Nees lace grass ME (E)
ERFO Eragrostis fosbergii Whitney Fosberg's lovegrass E
ERFR Eragrostis frankii C.A. Mey. ex Steud. sandbar lovegrass MA (SC)
ERHY Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb. teal lovegrass ME (PX)
ERPET3 Eragrostis pectinacea (Michx.) Nees ex Steud. var. tracyi (Hitchc.) P.M. Peterson Sanibel Island lovegrass
ERTR Eragrostis tracyi Hitchc. FL (E)
ERRE Eragrostis refracta (Muhl.) Scribn. coastal lovegrass MD (T)
ERHIM Erechtites hieraciifolia (L.) Raf. ex DC. var. megalocarpa (Fernald) Cronquist American burnweed NY (E)
ERPAK Eremalche parryi (Greene) Greene ssp. kernensis (C.B. Wolf) D.M. Bates Kern mallow
ERKE4 Eremalche kernensis C.B. Wolf E
ERAL Eremocrinum albomarginatum (M.E. Jones) M.E. Jones lonely lily AZ (SR)
ERBR3 Eriastrum brandegeeae H. Mason Brandegee's woollystar
ERTR4 Eriastrum tracyi H. Mason CA (R)
ERDES Eriastrum densifolium (Benth.) H. Mason ssp. sanctorum (Milliken) H. Mason E CA (E)
ERBU Erigenia bulbosa (Michx.) Nutt. harbinger of spring NY (E), PA (T), WI (E)
ERACD2 Erigeron acris L. ssp. debilis (A. Gray) Piper bitter fleabane
TRAC3 Trimorpha acris auct. non (L.) Gray p.p. ME (PX)
ERAL3 Erigeron aliceae Howell Alice Eastwood's fleabane WA (S)
ERBA4 Erigeron basalticus Hoover basalt fleabane WA (T)
ERDED Erigeron decumbens Nutt. var. decumbens Willamette fleabane E OR (E)
EREL10 Erigeron elatus (Hook.) Greene swamp boreal-daisy
TREL10 Trimorpha elata (Hook.) G.L. Nesom WA (S)
ERHE9 Erigeron hessii G.L. Nesom Hess' fleabane NM (E)
ERHO3 Erigeron howellii A. Gray Howell's fleabane WA (T)
ERHY5 Erigeron hyssopifolius Michx. hyssopleaf fleabane ME (SC), MI (T), NY (E)
ERKU Erigeron kuschei Eastw. Chiricahua fleabane AZ (SR)
ERLE14 Erigeron lemmonii A. Gray Lemmon's fleabane AZ (HS)
ERMA8 Erigeron maguirei Cronquist Maguire's fleabane T
EROR2 Erigeron oreganus A. Gray gorge fleabane WA (T)
ERPA3 Erigeron parishii A. Gray Parish's fleabane T
ERPET2 Erigeron peregrinus (Banks ex Pursh) Greene ssp. peregrinus var. thompsonii (S.F. Blake ex J.W. Thompson) Cronquist subalpine fleabane WA (S)
ERPI3 Erigeron piperianus Cronquist Piper's fleabane WA (S)
ERPI9 Erigeron piscaticus G.L. Nesom Fish Creek fleabane AZ (SR)
ERRH2 Erigeron rhizomatus Cronquist rhizome fleabane T NM (E)
ERSA17 Erigeron salishii G.W. Douglas & Packer Star Peak fleabane WA (S)
ERAQ2 Eriocaulon aquaticum (Hill) Druce sevenangle pipewort MD (E)
ERSE4 Eriocaulon septangulare With. IN (E), OH (E)
ERDE5 Eriocaulon decangulare L. tenangle pipewort PA (X), TN (E)
ERKO Eriocaulon koernickianum van Heurck & Müll. Arg. gulf pipewort AR (E)
ERLI3 Eriocaulon lineare Small narrow pipewort NC (E)
ERNI7 Eriocaulon nigrobracteatum Bridges & Orzell blackbract pipewort FL (E)
ERPA4 Eriocaulon parkeri B.L. Rob. estuary pipewort CT (T), ME (SC), MD (T), MA (E), PA (X)
ERAL12 Eriodictyon altissimum P.V. Wells Indian Knob mountainbalm E CA (E)
ERCA7 Eriodictyon capitatum Eastw. Lompoc yerba santa E CA (R)
ERAL6 Eriogonum alpinum Engelm. Trinity buckwheat CA (E)
ERAP4 Eriogonum apricum J.T. Howell Ione buckwheat E
ERAPA Eriogonum apricum J.T. Howell var. apricum Ione buckwheat CA (E)
ERAPP Eriogonum apricum J.T. Howell var. prostratum Myatt Irish Hill buckwheat CA (R)
ERAR18 Eriogonum argophyllum Reveal Sulphur Hot Springs buckwheat NV (FP)
ERBU2 Eriogonum butterworthianum J.T. Howell Butterworth's buckwheat CA (R)
ERCA11 Eriogonum capillare Small San Carlos buckwheat AZ (SR)
ERCH6 Eriogonum chrysops Rydb. bitterroot buckwheat OR (T)
ERCO43 Eriogonum codium Reveal, Caplow & K. Beck basalt desert buckwheat WA (E)
ERCR3 Eriogonum crocatum Davidson Conejo buckwheat CA (R)
ERCR10 Eriogonum crosbyae Reveal Crosby's buckwheat OR (T)
ERGIC Eriogonum giganteum S. Watson var. compactum Dunkle Santa Barbara Island buckwheat CA (R)
ERGRT Eriogonum grande Greene var. timorum Reveal San Nicolas Island buckwheat CA (E)
ERGY Eriogonum gypsophilum Woot. & Standl. Seven River Hills buckwheat T NM (E)
ERHEA4 Eriogonum heermannii Durand & Hilg. var. apachense (Reveal) Reveal Apache buckwheat
ERAP3 Eriogonum apachense Reveal AZ (SR)
ERKE Eriogonum kelloggii A. Gray Red Mountain buckwheat CA (E)
ERKEA2 Eriogonum kennedyi Porter ex S. Watson var. austromontanum Munz & I.M. Johnst. southern mountain buckwheat T
ERLOG Eriogonum longifolium Nutt. var. gnaphalifolium Gandog. longleaf buckwheat T
ERFL11 Eriogonum floridanum Small FL (E)
ERLOH Eriogonum longifolium Nutt. var. harperi (Goodman) Reveal Harper's buckwheat TN (E)
ERMA2 Eriogonum maculatum A. Heller spotted buckwheat WA (PX)
ERMO9 Eriogonum mortonianum Reveal Fredonia buckwheat AZ (SR)
EROVV Eriogonum ovalifolium Nutt. var. vineum (Small) Jeps. Cushenbury buckwheat E
EROVW Eriogonum ovalifolium Nutt. var. williamsiae Reveal Williams' buckwheat E NV (FP)
ERPE10 Eriogonum pelinophilum Reveal E
ERRI Eriogonum ripleyi J.T. Howell Fraziers Well buckwheat AZ (SR)
ERTHA2 Eriogonum thompsoniae S. Watson var. atwoodii Reveal Atwood's buckwheat AZ (SR)
ERTH6 Eriogonum thornei (Reveal & Henrickson) L.M. Shultz Thorne's buckwheat
ERERT Eriogonum ericifolium Torr. & A. Gray var. thornei Reveal & Henrickson CA (E)
ERTW2 Eriogonum twisselmannii (J.T. Howell) Reveal Twisselmann's buckwheat CA (R)
ERVI7 Eriogonum viscidulum J.T. Howell sticky buckwheat NV (FP)
ERAN6 Eriophorum angustifolium Honck. tall cottongrass IN (R), NH (E)
ERANA3 Eriophorum angustifolium Honck. ssp. angustifolium tall cottongrass
ERANS Eriophorum angustifolium Honck. ssp. scabriusculum Hultén NY (E)
ERGR8 Eriophorum gracile W.D.J. Koch slender cottongrass IN (T), IA (T), MA (T), NJ (E), OH (PRX), PA (E), RI (T)
ERTE12 Eriophorum tenellum Nutt. fewnerved cottongrass NJ (E), PA (E)
ERVAS Eriophorum vaginatum L. var. spissum (Fernald) B. Boivin tussock cottongrass CT (E), NJ (E), RI (H)
ERSP8 Eriophorum spissum Fernald IN (X)
ERVI8 Eriophorum virginicum L. tawny cottongrass IL (E), KY (E), TN (T)
ERVI9 Eriophorum viridicarinatum (Engelm.) Fernald thinleaf cottonsedge IN (R), PA (T), RI (SC), WA (S)
ERCO16 Eriophyllum congdonii Brandegee Congdon's woolly sunflower CA (R)
ERLA8 Eriophyllum latilobum Rydb. San Mateo woolly sunflower E CA (E)
ERFR4 Erithalis fruticosa L. blacktorch FL (T)
ERNAE Eritrichium nanum (Vill.) Schrad. ex Gaudin var. elongatum (Rydb.) Cronquist arctic alpine forget-me-not WA (S)
ERCO44 Ernodea cokeri Britton ex Coker one-nerved ernodea FL (E)
ERRO7 Errazurizia rotundata (Woot.) Barneby roundleaf dunebroom AZ (SR)
ERAQ Eryngium aquaticum L. rattlesnakemaster PA (X)
ERARP Eryngium aristulatum Jeps. var. parishii (J.M. Coult. & Rose) Mathias & Constance Parish's eryngo E CA (E)
ERAR14 Eryngium articulatum Hook. beethistle WA (PX)
ERCO39 Eryngium constancei Sheikh Loch Lomond eryngo E CA (E)
ERCU4 Eryngium cuneifolium Small wedgeleaf eryngo E FL (E)
ERIN6 Eryngium integrifolium Walter blueflower eryngo KY (E)
ERPE7 Eryngium petiolatum Hook. rushleaf eryngo WA (T)
ERPR5 Eryngium prostratum Nutt. ex DC. creeping eryngo IL (E)
ERRA5 Eryngium racemosum Jeps. delta eryngo CA (E)
ERYU Eryngium yuccifolium Michx. button eryngo MD (E, X), MI (T), OH (T)
ERCA14 Erysimum capitatum (Douglas ex Hook.) Greene sanddune wallflower IN (T), TN (E)
ERCAA Erysimum capitatum (Douglas ex Hook.) Greene var. angustatum (Greene) G. Rossb. Contra Costa wallflower E CA (E)
ERCAC Erysimum capitatum (Douglas ex Hook.) Greene var. capitatum sanddune wallflower
ERAR26 Erysimum arkansanum Nutt. OH (E)
ERME5 Erysimum menziesii (Hook.) Wettst. Menzies' wallflower E CA (E)
ERTE14 Erysimum teretifolium Eastw. Santa Cruz wallflower E CA (E)
ERAL9 Erythronium albidum Nutt. white fawnlily MD (T)
ERAM5 Erythronium americanum Ker Gawl. dogtooth violet IA (T)
EREL13 Erythronium elegans Hammond & K.L. Chambers Coast Range fawnlily OR (T)
ERME15 Erythronium mesochoreum Knerr midland fawnlily IL (T)
ERPR6 Erythronium propullans A. Gray Minnesota fawnlily E MN (E)
ERRE5 Erythronium revolutum Sm. mahogany fawnlily WA (S)
ERRO5 Erythronium rostratum W. Wolf yellow troutlily KY (SC), OH (E), TN (SC)
ERUM2 Erythronium umbilicatum Parks & Hardin dimpled troutlily FL (E)
ESAL2 Escobaria alversonii (J.M. Coult.) N.P. Taylor cushion foxtail cactus
COVIA Coryphantha vivipara (Nutt.) Britton & Rose var. alversonii (J.M. Coult.) L.D. Benson AZ (SR)
ESDU Escobaria duncanii (Hester) Backeb. Duncan's foxtail cactus NM (E)
ESMI2 Escobaria minima (Baird) D.R. Hunt Nellie cory cactus
COMI4 Coryphantha minima Baird E TX (E)
ESMI3 Escobaria missouriensis (Sweet) D.R. Hunt Missouri foxtail cactus
COMI5 Coryphantha missouriensis (Sweet) Britton & Rose AZ (SR)
ESORO Escobaria orcuttii Boed. var. orcuttii Orcutt's foxtail cactus
COSTO Coryphantha strobiliformis (Poselg.) Moran var. orcuttii (Boed.) L.D. Benson AZ (SR)
ESOR2 Escobaria organensis (A.D. Zimmerman) Castetter, Pierce & Schwerin Organ Mountain foxtail cactus NM (E)
ESRO Escobaria robbinsiorum (W.H. Earle) D.R. Hunt Cochise foxtail cactus
CORO3 Coryphantha robbinsiorum (W.H. Earle) A.D. Zimmerman T AZ (HS)
ESSNL Escobaria sneedii Britton & Rose var. leei (Rose ex Boed.) D.R. Hunt Sneed's pincushion cactus NM (E)
COSNL Coryphantha sneedii (Britton & Rose) A. Berger var. leei (Rose ex Boed.) L.D. Benson T
ESSNS Escobaria sneedii Britton & Rose var. sneedii Sneed's pincushion cactus NM (E)
COSN Coryphantha sneedii (Britton & Rose) A. Berger E TX (E)
ESTU Escobaria tuberculosa (Engelm.) Britton & Rose whitecolumn foxtail cactus
COST7 Coryphantha strobiliformis auct. non (Poselg.) Orcutt AZ (SR)
ESVI Escobaria villardii Castetter, Pierce & Schwerin Sacramento Mountain foxtail cactus NM (E)
ESVI2 Escobaria vivipara (Nutt.) Buxbaum spinystar MN (E)
ESVIA Escobaria vivipara (Nutt.) Buxbaum var. arizonica (Engelm.) D.R. Hunt Arizona spinystar NV (CY)
COVIA2 Coryphantha vivipara (Nutt.) Britton & Rose var. arizonica (Engelm.) W.T. Marsh. AZ (SR)
ESVIB Escobaria vivipara (Nutt.) Buxbaum var. bisbeeana (Orcutt) D.R. Hunt Bisbee spinystar
COVIB Coryphantha vivipara (Nutt.) Britton & Rose var. bisbeeana (Orcutt) L.D. Benson AZ (SR)
ESVID Escobaria vivipara (Nutt.) Buxbaum var. deserti (Engelm.) D.R. Hunt desert spinystar NV (CY)
COVID Coryphantha vivipara (Nutt.) Britton & Rose var. deserti (Engelm.) W.T. Marsh. AZ (SR)
ESVIR2 Escobaria vivipara (Nutt.) Buxbaum var. rosea (Clokey) D.R. Hunt spinystar NV (CY)
COVIR2 Coryphantha vivipara (Nutt.) Britton & Rose var. rosea (Clokey) L.D. Benson AZ (SR)
ESVIV Escobaria vivipara (Nutt.) Buxbaum var. vivipara spinystar
COMIM Coryphantha missouriensis (Sweet) Britton & Rose var. marstonii (Clover) L.D. Benson AZ (SR)
EURA5 Eubotrys racemosa (L.) Nutt. swamp doghobble
LERA4 Leucothoe racemosa (L.) A. Gray PA (T), TN (T)
EURE10 Eubotrys recurva (Buckley) Britton redtwig doghobble
LERE6 Leucothoe recurva (Buckley) A. Gray KY (E)
EUVI8 Eucephalus vialis Bradshaw wayside aster
ASVI4 Aster vialis (Bradshaw) S.F. Blake OR (T)
EUCO4 Eugenia confusa DC. redberry stopper FL (E)
EUHA4 Eugenia haematocarpa Alain Luquillo Mountain stopper E
EUKO Eugenia koolauensis O. Deg. nioi E
EURH Eugenia rhombea (Berg) Krug & Urb. red stopper FL (E)
EUWO2 Eugenia woodburyana Alain Woodbury's stopper E
EUAM9 Euonymus americanus L. bursting-heart
EUAM7 Euonymus americana L., orth. var. IL (E), NY (E)
EUAT5 Euonymus atropurpureus Jacq. burningbush FL (E)
EUOB8 Euonymus obovatus Nutt. running strawberry bush
EUOB9 Euonymus obovata Nutt., orth. var. NY (EV), TN (SC)
EUOC8 Euonymus occidentalis Nutt. ex Torr. western burning bush WA (S)
EUDU2 Eupatoriadelphus dubius (Willd. ex Poir.) King & H. Rob. coastal plain joe pye weed
EUDU Eupatorium dubium Willd. ex Poir. ME (T)
EUFI2 Eupatoriadelphus fistulosus (Barratt) King & H. Rob. trumpetweed
EUFI Eupatorium fistulosum Barratt ME (SC), MI (T), NH (E)
EUMAM3 Eupatoriadelphus maculatus (L.) King & H. Rob. var. maculatus spotted trumpetweed
EUMA6 Eupatorium maculatum L. KY (H), MD (E, X)
EUAL2 Eupatorium album L. white thoroughwort CT (E), IN (E), OH (T), PA (X)
EUALS Eupatorium album L. var. subvenosum A. Gray white thoroughwort NY (T)
EUCA5 Eupatorium capillifolium (Lam.) Small dogfennel NJ (E)
EUHY Eupatorium hyssopifolium L. hyssopleaf thoroughwort OH (E)
EUHYL Eupatorium hyssopifolium L. var. laciniatum A. Gray hyssopleaf thoroughwort NY (T)
EULE Eupatorium leucolepis (DC.) Torr. & A. Gray justiceweed MD (T), PA (X), TN (E)
EULEL Eupatorium leucolepis (DC.) Torr. & A. Gray var. leucolepis justiceweed NY (E)
EULEN Eupatorium leucolepis (DC.) Torr. & A. Gray var. novae-angliae Fernald justiceweed MA (E), RI (E)
EUPEC Eupatorium perfoliatum L. var. colpophilum Fernald & Grisc. common boneset ME (PX)
EURE8 Eupatorium resinosum Torr. ex DC. pine barren thoroughwort NJ (E), NC (SC, T)
EURO4 Eupatorium rotundifolium L. roundleaf thoroughwort ME (PX)
EUROO Eupatorium rotundifolium L. var. ovatum (Bigelow) Torr. roundleaf thoroughwort NY (E)
EUPU11 Eupatorium pubescens Muhl. ex Willd. NH (E)
EUROR Eupatorium rotundifolium L. var. rotundifolium roundleaf thoroughwort NY (E)
EUSE Eupatorium semiserratum DC. smallflower thoroughwort KY (E)
EUSE2 Eupatorium serotinum Michx. lateflowering thoroughwort NY (E)
EUSE3 Eupatorium sessilifolium L. upland boneset MI (T), MN (T), NH (E), VT (E)
EUST11 Eupatorium steelei E. Lamont Steele's eupatorium KY (E), TN (SC)
EUCO8 Euphorbia commutata Engelm. ex A. Gray tinted woodland spurge FL (E), MI (T)
EUHA2 Euphorbia haeleeleana D.R. Herbst Kauai spurge E
EUIP Euphorbia ipecacuanhae L. American ipecac NY (E), PA (E)
EUMA10 Euphorbia macropus (Klotzsch & Garcke) Boiss. Huachuca Mountain spurge
EUPL4 Euphorbia plummerae S. Watson, orth. var. AZ (SR)
EUME4 Euphorbia mercurialina Michx. mercury spurge KY (T)
EUPI5 Euphorbia pinetorum (Small) G.L. Webster pineland spurge
POPI6 Poinsettia pinetorum Small FL (E)
EUPU4 Euphorbia purpurea (Raf.) Fernald Darlington's glade spurge MD (E), NJ (E), OH (E), PA (E)
EUSP Euphorbia spathulata Lam. warty spurge IL (E)
EUOB3 Euphorbia obtusata Pursh IN (X), MD (E), PA (E)
EUTE6 Euphorbia telephioides Chapm. telephus spurge T FL (E)
EUDI9 Euphrasia disjuncta Fernald & Wiegand polar eyebright ME (PX)
EUHU2 Euphrasia hudsoniana Fernald & Wiegand Hudson Bay eyebright MI (T)
EUNE3 Euphrasia nemorosa (Pers.) Wallr. common eyebright MI (T)
EUOA Euphrasia oakesii Wettst. Oakes' eyebright ME (E), NH (E)
EUFU3 Eurybia furcata (Burgess) G.L. Nesom forked aster
ASFU Aster furcatus Burgess AR (T), IL (T), IN (R), IA (T), MI (T), WI (T)
EUHE10 Eurybia hemispherica (Alexander) G.L. Nesom southern prairie aster
ASHE7 Aster hemisphericus Alexander FL (E), KY (E)
EUMA27 Eurybia macrophylla (L.) Cass. bigleaf aster
ASMA2 Aster macrophyllus L. IA (E), RI (SC)
EUME17 Eurybia merita (A. Nelson) G.L. Nesom subalpine aster
ASSIM Aster sibiricus L. var. meritus (A. Nelson) Raup WA (S)
EURA10 Eurybia radula (Aiton) G.L. Nesom low rough aster
ASRA8 Aster radula Aiton CT (E), KY (E), MD (E), NJ (E), NY (E)
EUSA15 Eurybia saxicastellii (J.J.N. Campbell & M. Medley) G.L. Nesom rockcastle aster
ASSA9 Aster saxicastellii J.J.N. Campbell & M. Medley KY (T), TN (E)
EUSC5 Eurybia schreberi (Nees) Nees Schreber's aster
ASSC2 Aster schreberi Nees IN (E), IA (E), ME (PX), TN (SC)
EUSP3 Eurybia spectabilis (Aiton) G.L. Nesom eastern showy aster
ASSP11 Aster spectabilis Aiton CT (T), MD (E), NY (T), PA (E)
EUSP4 Eurybia spinulosa (Chapm.) G.L. Nesom Apalachicola aster
ASSP12 Aster spinulosus Chapm. FL (E)
EUSU7 Eurybia surculosa (Michx.) G.L. Nesom creeping aster
ASSU9 Aster surculosus Michx. OH (PRX)
EUCA26 Euthamia caroliniana (L.) Greene ex Porter & Britton slender goldentop
EUTE7 Euthamia tenuifolia (Pursh) Nutt. ME (T), PA (T)
EUGY Euthamia gymnospermoides Greene Texas goldentop
EURE9 Euthamia remota Greene OH (T)
EUPE10 Eutrema penlandii Rollins Penland's eutrema T
EVCO Evolvulus convolvuloides (Willd. ex Schult.) Stearn bindweed dwarf morning-glory FL (E)
EVGR Evolvulus grisebachii Peter Grisebach's dwarf morning-glory FL (E)
EVNU Evolvulus nuttallianus Schult. shaggy dwarf morning-glory TN (SC)
EVSE Evolvulus sericeus Sw. silver dwarf morning-glory AR (T)
EVSES Evolvulus sericeus Sw. var. sericeus silver dwarf morning-glory GA (E)
EXLU Exocarpos luteolus Forbes leafy ballart E
EXCA Exostema caribaeum (Jacq.) Schult. Caribbean princewood FL (E)
FECYC Ferocactus cylindraceus (Engelm.) Orcutt var. cylindraceus California barrel cactus AZ (SR)
FECYL Ferocactus cylindraceus (Engelm.) Orcutt var. lecontei (Engelm.) H. Bravo Leconte's barrel cactus AZ (SR), NV (CY)
FEEA2 Ferocactus eastwoodiae (L.D. Benson) L.D. Benson California barrel cactus
FECYE Ferocactus cylindraceus (Engelm.) Orcutt var. eastwoodiae (L.D. Benson) N.P. Taylor AZ (SR)
FEEM Ferocactus emoryi (Engelm.) Orcutt Emory's barrel cactus AZ (SR)
FEWI Ferocactus wislizeni (Engelm.) Britton & Rose candy barrelcactus AZ (SR)
FEAL Festuca altaica Trin. Altai fescue
FESC Festuca scabrella Torr. ex Hook. MI (T)
FEOC Festuca occidentalis Hook. western fescue WI (T)
FEPA2 Festuca paradoxa Desv. clustered fescue IN (E), MD (E, X), PA (E), TN (SC)
FERUR2 Festuca rubra L. ssp. rubra red fescue
FEPR2 Festuca prolifera (Piper) Fernald ME (E)
FERUP Festuca rubra L. var. prolifera (Piper) Piper NH (E)
FESA Festuca saximontana Rydb. Rocky Mountain fescue NY (E)
FIOC Filipendula occidentalis (S. Watson) Howell queen of the forest WA (T)
FIRU2 Filipendula rubra (Hill) B.L. Rob. queen of the prairie IL (E), IA (T), MD (E), MI (T), NJ (E), NC (E)
FIAN Fimbristylis annua (All.) Roem. & Schult. annual fimbry PA (T)
FIAU2 Fimbristylis autumnalis (L.) Roem. & Schult. slender fimbry ME (T), VT (E)
FICA4 Fimbristylis castanea (Michx.) Vahl marsh fimbry NY (T)
FIPE Fimbristylis perpusilla Harper ex Small & Britton Harper's fimbry GA (E), MD (E), NC (T), TN (E), VA (E)
FIPU Fimbristylis puberula (Michx.) Vahl hairy fimbry IN (E), KY (T), MI (PREX), PA (X), TN (T), WI (E)
FIPUI Fimbristylis puberula (Michx.) Vahl var. interior (Britton) Kral hairy fimbry MN (E)
FIVA Fimbristylis vahlii (Lam.) Link Vahl's fimbry IL (E)
FICL Fissidens clebschii Steere Clebsch's fissidens moss TN (SC)
FIHY Fissidens hyalinus Wilson & Hook. fissidens moss OH (E)
FICU2 Fitzroya cupressoides (Molina) I.M. Johnst. Patagonian cypress T
FLMA Flaveria macdougalii Theroux, Pinkava & Keil Mcdougall's yellowtops AZ (SR)
FLIN2 Fleischmannia incarnata (Walter) King & H. Rob. pink thoroughwort
EUIN Eupatorium incarnatum Walter IL (T), IN (T)
FLPR Floerkea proserpinacoides Willd. false mermaidweed CT (E), IA (E), MN (T)
FLNE Flueggea neowawraea W.J. Hayden mehamehame E
FOGO Forestiera godfreyi L.C. Anderson Godfrey's swampprivet FL (E)
FOLI Forestiera ligustrina (Michx.) Poir. upland swampprivet KY (T)
FOGA Fothergilla gardenii L. dwarf witchalder FL (E), GA (T)
FOMA Fothergilla major (Sims) Lodd. mountain witchalder TN (T)
FOSP2 Fouquieria splendens Engelm. ocotillo AZ (SR)
FRVEA2 Fragaria vesca L. ssp. americana (Porter) Staudt woodland strawberry
FRVEA4 Fragaria vesca L. var. americana Porter IN (X)
FRJO Frankenia johnstonii Correll Johnston's seaheath E TX (E)
FRCA2 Frasera caroliniensis Walter American columbo NY (T), PA (E)
FRGY Frasera gypsicola (Barneby) D.M. Post Sunnyside frasera NV (FP)
FRNI Fraxinus nigra Marsh. black ash RI (SC)
FRPR Fraxinus profunda (Bush) Bush pumpkin ash MI (T), NJ (E), PA (E)
FRQU Fraxinus quadrangulata Michx. blue ash IA (T), WI (T)
FRCA6 Fremontodendron californicum (Torr.) Coville California flannelbush AZ (SR)
FRDE2 Fremontodendron decumbens R. Lloyd Pine Hill flannelbush CA (R)
FRCAD Fremontodendron californicum (Torr.) Coville ssp. decumbens (R. Lloyd) Munz E
FRME2 Fremontodendron mexicanum Davidson Mexican flannelbush E CA (R)
FRAT Fritillaria atropurpurea Nutt. spotted fritillary AZ (SR)
FRCA5 Fritillaria camschatcensis (L.) Ker Gawl. Kamchatka fritillary WA (S)
FRGE Fritillaria gentneri Gilkey Gentner's fritillary E OR (E)
FRGR4 Fritillaria grayana Rchb. f. & Baker Gray's fritillary
FRRO Fritillaria roderickii Knight CA (E)
FRST Fritillaria striata Eastw. striped abobe lily CA (T)
FRFL Froelichia floridana (Nutt.) Moq. plains snakecotton OH (E)
FROB2 Frullania obcordata (Lehm. & Lindenb.) Lehm. & Lindenb. TN (SC)
FUPU Fuirena pumila (Torr.) Spreng. dwarf umbrella-sedge IN (T), NY (R), RI (E), WI (E)
FUSQ Fuirena squarrosa Michx. hairy umbrella-sedge MI (T), TN (SC)
GALA7 Gahnia lanaiensis O. Deg., I. Deg. & J. Kern Lanai sawsedge E
GARE2 Galactia regularis (L.) Britton, Sterns & Poggenb. eastern milkpea PA (X)
GASM Galactia smallii H.J. Rogers ex Herndon Small's milkpea E FL (E)
GAVO Galactia volubilis (L.) Britton downy milkpea NJ (E), OH (T), PA (X)
GABI6 Galeandra bicarinata G.A. Romero & P.M. Brown Beyrich's hooded orchid
GABE2 Galeandra beyrichii auct. non Rchb. f. FL (E)
GASP5 Galearis spectabilis (L.) Raf. showy orchid ME (E), MI (T), NH (T), NY (EV), RI (E)
GAANB Galium angustifolium Nutt. ex A. Gray ssp. borregoense Dempster & Stebbins Borrego bedstraw CA (R)
GAAS2 Galium asprellum Michx. rough bedstraw TN (SC)
GABO2 Galium boreale L. northern bedstraw MD (E), MA (E)
GABR6 Galium brevipes Fernald & Wiegand limestone swamp bedstraw ME (SC)
GABU Galium buxifolium Greene box bedstraw E CA (R)
GACAS Galium californicum Hook. & Arn. ssp. sierrae Dempster & Stebbins El Dorado bedstraw E CA (R)
GACAA Galium catalinense A. Gray ssp. acrispum Dempster Santa Clemente Island bedstraw CA (E)
GACO3 Galium concinnum Torr. & A. Gray shining bedstraw NY (E)
GAHI Galium hispidulum Michx. coastal bedstraw MD (E), NJ (E)
GAKA Galium kamtschaticum Steller ex Schult. & Schult. f. boreal bedstraw ME (SC), MI (T), NY (E), WA (S)
GALA2 Galium labradoricum (Wiegand) Wiegand northern bog bedstraw CT (SC), IL (T), IA (E), ME (SC), MA (T), NH (E), NJ (E), OH (E), PA (E), VT (T)
GALA3 Galium lanceolatum Torr. lanceleaf wild licorice IL (E)
GAOB Galium obtusum Bigelow bluntleaf bedstraw ME (PX)
GAOBO Galium obtusum Bigelow ssp. obtusum bluntleaf bedstraw NH (E)
GAPA3 Galium palustre L. common marsh bedstraw OH (E), TN (SC)
GAPI2 Galium pilosum Aiton hairy bedstraw NH (E)
GATR2 Galium trifidum L. threepetal bedstraw NJ (E)
GAVI Galium virgatum Nutt. southwestern bedstraw IL (E)
GAPU3 Gamochaeta purpurea (L.) Cabrera spoonleaf purple everlasting ME (PX), MA (E)
GNPU2 Gnaphalium purpureum L. CT (SC), NY (E), RI (H)
GAHE4 Garberia heterophylla (Bartram) Merr. & F. Harper garberia FL (T)
GABR Gardenia brighamii Gardenia brighamii forest gardenia E
GAMA6 Gardenia mannii H. St. John & Kuykend. Oahu gardenia E
GAHI2 Gaultheria hispidula (L.) Muhl. ex Bigelow creeping snowberry CT (T), MD (E), NJ (E), OH (PRX), PA (R), RI (T), WA (S)
GAPR2 Gaultheria procumbens L. eastern teaberry IL (E)
GAFI2 Gaura filipes Spach slenderstalk beeblossom IN (T)
GANEC Gaura neomexicana Woot. ssp. coloradensis (Rydb.) P.H. Raven & Gregory Colorado butterfly plant
GANEC2 Gaura neomexicana Woot. var. coloradensis (Rydb.) Munz T
GABA Gaylussacia baccata (Wangenh.) K. Koch black huckleberry IA (T)
GABR5 Gaylussacia brachycera (Michx.) A. Gray box huckleberry MD (E), PA (E)
GADU Gaylussacia dumosa (Andrews) Torr. & A. Gray dwarf huckleberry PA (E), TN (T)
GADUB Gaylussacia dumosa (Andrews) Torr. & A. Gray var. bigeloviana Fernald CT (T), NH (T), NY (E), RI (SC)
GESE Gelsemium sempervirens (L.) W.T. Aiton evening trumpetflower TN (SC)
GEAL4 Gentiana alba Muhl. ex Nutt. plain gentian IN (R), OH (T), PA (X), WI (T)
GEFL Gentiana flavida A. Gray KY (E), MI (E)
GEAN Gentiana andrewsii Griseb. closed bottle gentian MD (T), MA (T), NH (T), NY (EV), RI (H), VT (T)
GEAU3 Gentiana austromontana Pringle & Sharp Appalachian gentian TN (SC)
GECA10 Gentiana catesbaei Walter Elliott's gentian PA (X)
GECL Gentiana clausa Raf. bottle gentian NY (EV)
GEDE3 Gentiana decora Pollard showy gentian KY (SC)
GEDO Gentiana douglasiana Bong. swamp gentian WA (S)
GEGL Gentiana glauca Pall. pale gentian WA (S)
GELI3 Gentiana linearis Froel. narrowleaf gentian MI (T), NJ (E), NY (EV), TN (T)
GEPE3 Gentiana pennelliana Fernald wiregrass gentian FL (E)
GEPU5 Gentiana puberulenta J. Pringle downy gentian IN (T), KY (E), MD (E, X), MI (E), OH (E), TN (E)
GERU Gentiana rubricaulis Schwein. closed gentian ME (PX)
GESA Gentiana saponaria L. harvestbells MI (PREX), NY (E), OH (E), PA (E)
GEVI5 Gentiana villosa L. striped gentian IN (E), MD (E), OH (E), PA (E)
GEAM3 Gentianella amarella (L.) Böerner autumn dwarf gentian ME (E), VT (T)
GEQU2 Gentianella quinquefolia (L.) Small agueweed ME (PX), MD (E), MI (T), NY (EV), VT (T)
GEQUQ Gentianella quinquefolia (L.) Small ssp. quinquefolia agueweed
GEQU3 Gentiana quinquefolia L. CT (E)
GETE4 Gentianella tenella (Rottb.) Böerner Dane's dwarf gentian WA (S)
GEWI2 Gentianella wislizeni (Engelm.) J.M. Gillett Chiricahua Mountain dwarf gentian AZ (SR)
GECR2 Gentianopsis crinita (Froel.) Ma greater fringed gentian GA (T), MD (E), NY (EV), NC (SC, E), RI (T)
GECR3 Gentiana crinita Froel. NH (T)
GEVIV3 Gentianopsis virgata (Raf.) Holub ssp. virgata lesser fringed gentian
GEPR6 Gentianopsis procera (T. Holm) Ma NY (E), PA (X)
GEMI Geocarpon minimum Mack. tinytim T AR (E), MO (E)
GELI2 Geocaulon lividum (Richardson) Fernald false toadflax ME (SC), NH (T), NY (E), WI (E)
GEAR Geranium arboreum A. Gray Hawai'i red cranesbill E
GEBI2 Geranium bicknellii Britton Bicknell's cranesbill CT (SC), IL (E), IN (E), OH (E), PA (E), RI (T)
GECAC4 Geranium carolinianum L. var. carolinianum Carolina geranium NH (E)
GECAC Geranium carolinianum L. var. confertiflorum Fernald NH (E)
GECAS Geranium carolinianum L. var. sphaerospermum (Fernald) Breitung Carolina geranium NY (T)
GEMU Geranium multiflorum A. Gray manyflower geranium E
GERO Geranium robertianum L. Robert geranium IN (T), MD (E), RI (SC)
GEPA3 Gesneria pauciflora Urb. yerba maricao de cueva T
GEAL3 Geum aleppicum Jacq. yellow avens MD (E)
GEGE Geum geniculatum Michx. bent avens NC (T), TN (E)
GELA Geum laciniatum Murray rough avens RI (H), TN (SC)
GEPE Geum peckii Pursh mountain avens NH (T)
GERA2 Geum radiatum Michx. Appalachian avens E NC (SC, E), TN (E)
GERI2 Geum rivale L. purple avens IN (E), WA (S)
GEROD Geum rossii (R. Br.) Ser. var. depressum (Greene) C.L. Hitchc. Ross' avens WA (S)
GETR Geum triflorum Pursh old man's whiskers MI (T), NY (T)
GEVE Geum vernum (Raf.) Torr. & A. Gray spring avens NY (E)
GEVI4 Geum virginianum L. cream avens NY (E)
GITEA2 Gilia tenuiflora Benth. ssp. arenaria (Benth.) A.D. Grant & V.E. Grant greater yellowthroat gilia E CA (T)
GITEH Gilia tenuiflora Benth. ssp. hoffmannii (Eastw.) A.D. Grant & V.E. Grant Hoffman's gilia E
GIST5 Gillenia stipulata (Muhl. ex Willd.) Baill. American ipecac
POST5 Porteranthus stipulatus (Muhl. ex Willd.) Britton MD (E, X)
GITR6 Gillenia trifoliata (L.) Moench Bowman's root MI (T)
GISP3 Githopsis specularioides Nutt. common bluecup WA (S)
GLCA2 Glandularia canadensis (L.) Nutt. rose mock vervain KY (T)
GLMA5 Glandularia maritima (Small) Small coastal mock vervain
VEMA3 Verbena maritima Small FL (E)
GLTA Glandularia tampensis (Nash) Small Tampa mock vervain
VETA Verbena tampensis Nash FL (E)
GLSU Glaucocarpum suffrutescens (Rollins) Rollins Uinta Basin waxfruit
SCSU2 Schoenocrambe suffrutescens (Rollins) S.L. Welsh & Chatterley E
GLMA Glaux maritima L. sea milkwort MD (E, X), MN (E), NJ (E), RI (H)
GLAQ Gleditsia aquatica Marsh. water locust IN (E), KY (SC)
GLAC Glyceria acutiflora Torr. creeping mannagrass IN (E), KY (T), ME (E), MD (E), MI (PREX), NH (E), OH (E), TN (SC), VT (E)
GLAR Glyceria arkansana Fernald Arkansas mannagrass IL (E)
GLBO Glyceria borealis (Nash) Batchelder small floating mannagrass IN (E), NJ (E), OH (PRX), PA (T)
GLGR Glyceria grandis S. Watson American mannagrass IN (X), MD (E), NJ (E), TN (PX, E)
GLLA Glyceria laxa (Scribn.) Scribn. limp mannagrass TN (SC)
GLNU Glyceria nubigena W.A. Anderson Great Smoky Mountain mannagrass NC (T), TN (T)
GLOB Glyceria obtusa (Muhl.) Trin. Atlantic mannagrass PA (E)
GOEL Goetzea elegans Wydler mata buey E PR (E)
GOOB2 Goodyera oblongifolia Raf. western rattlesnake plantain AZ (SR), ME (E)
GOPU Goodyera pubescens (Willd.) R. Br. downy rattlesnake plantain FL (E), NY (EV)
GORE2 Goodyera repens (L.) R. Br. lesser rattlesnake plantain AZ (SR), MD (E, X), MA (E), NY (EV), TN (SC)
GOREO2 Goodyera repens (L.) R. Br. var. ophioides Fernald CT (SC)
GOTE Goodyera tesselata Lodd. checkered rattlesnake plantain MD (E, X), NJ (E), NY (EV), OH (PRX), PA (T)
GOHI Gossypium hirsutum L. upland cotton FL (E)
GOHI2 Gouania hillebrandii Oliv. ex Hillebr. hairyfruit chewstick E
GOME Gouania meyenii Steud. smoothfruit chewstick E
GOVI Gouania vitifolia A. Gray Oahu chewstick E
GOFL2 Govenia floridana P.M. Brown tropical govenia
GOUT Govenia utriculata auct. non (Sw.) Lindl. FL (E)
GRNI Grammitis nimbata (Jenman) Proctor West Indian dwarf polypody NC (E)
GRBA3 Graptopetalum bartramii Rose Patagonia Mountain leatherpetal AZ (SR)
GRRU Graptopetalum rusbyi (Greene) Rose San Francisco River leatherpetal AZ (SR)
GRAU Gratiola aurea Pursh golden hedgehyssop MI (T), PA (E)
GRFL2 Gratiola floridana Nutt. Florida hedgehyssop TN (E)
GRHE Gratiola heterosepala H. Mason & Bacig. Boggs Lake hedgehyssop CA (E), OR (T)
GRPI Gratiola pilosa Michx. shaggy hedgehyssop KY (T)
GRRA Gratiola ramosa Walter branched hedgehyssop MD (E, X)
GRVI Gratiola virginiana L. roundfruit hedgehyssop MI (T), RI (SC)
GRVI2 Gratiola viscidula Pennell Short's hedgehyssop KY (SC), MD (E)
GROL Grimmia olneyi Sull. Olney's dry rock moss TN (SC)
GRFR Grindelia fraxinopratensis Reveal & Beatley Ash Meadows gumweed T NV (FP)
GRCL Grusonia clavata (Engelm.) H. Rob. club cholla
OPCL Opuntia clavata Engelm. AZ (SR)
GRKU Grusonia kunzei (Rose) Pinkava devil's cholla
OPKU Opuntia kunzei Rose AZ (SR)
GRPA11 Grusonia parishii (Orcutt) Pinkava matted cholla
OPEM2 Opuntia emoryi auct. non Engelm. AZ (SR)
OPPA Opuntia parishii Orcutt AZ (SR), NV (CY)
GRPU3 Grusonia pulchella (Engelm.) H. Rob. sagebrush cholla
OPPU Opuntia pulchella Engelm. AZ (SR), NV (CY)
GUSA Guaiacum sanctum L. holywood FL (E)
GULA4 Guillenia lasiophylla (Hook. & Arn.) Greene California mustard
CAST14 Caulanthus stenocarpus Payson CA (E)
GUMO Guzmania monostachia (L.) Rusby ex Mez West Indian tufted airplant FL (E)
GYLA Gyminda latifolia (Sw.) Urb. West Indian false box FL (E)
GYAP Gymnocarpium appalachianum Pryer Appalachian oakfern NC (E), OH (PRX), PA (E)
GYDR Gymnocarpium dryopteris (L.) Newman western oakfern IL (E), IA (T), MD (E), NY (EV), OH (T), RI (T)
GYHE3 Gymnocarpium ×heterosporum W.H. Wagner (pro sp.) [appalachianum × robertianum] blackspore oakfern
GYHE Gymnocarpium heterosporum W.H. Wagner PA (X)
GYJE Gymnocarpium jessoense (Koidzumi) Koidzumi Asian oakfern MI (E)
GYRO Gymnocarpium robertianum (Hoffm.) Newman scented oakfern IL (E), MI (T)
GYDI Gymnocladus dioicus (L.) K. Koch Kentucky coffeetree NY (E)
GYLI Gymnoderma lineare (A. Evans) Yoshim. & Sharp gymnoderma lichen E GA (E), NC (T)
GYLA3 Gymnomitrion laceratum (Steph.) Horik. TN (T)
GYAM Gymnopogon ambiguus (Michx.) Britton, Sterns & Poggenb. bearded skeletongrass IN (X), KY (SC), OH (PRX), PA (X)
GYBR Gymnopogon brevifolius Trin. shortleaf skeletongrass KY (E), MD (E), NJ (E), TN (SC)
HADI6 Habenaria distans Griseb. hammock bog orchid FL (E)
HACI2 Hackelia cinerea (Piper) I.M. Johnst. gray stickseed WA (S)
HACR4 Hackelia cronquistii J.L. Gentry Cronquist's stickseed OR (T)
HADE Hackelia deflexa (Wahlenb.) Opiz nodding stickseed ME (E), OH (PRX)
HADEA Hackelia deflexa (Wahlenb.) Opiz var. americana (A. Gray) Fernald & I.M. Johnst. American stickseed NH (E), NY (E), VT (T)
HAAM2 Hackelia americana (A. Gray) Fernald IL (E)
HADID Hackelia diffusa (Lehm.) I.M. Johnst. var. diffusa spreading stickseed WA (S)
HAHID Hackelia hispida (A. Gray) I.M. Johnst. var. disjuncta R.L. Carr rough stickseed WA (S)
HAHIH Hackelia hispida (A. Gray) I.M. Johnst. var. hispida showy stickseed WA (S)
HAVE4 Hackelia venusta (Piper) H. St. John lesser showy stickseed E WA (E)
HAVI2 Hackelia virginiana (L.) I.M. Johnst. beggarslice NH (T)
HADE2 Halenia deflexa (Sm.) Griseb. American spurred gentian MA (E), NH (E), NY (E)
HACA3 Halesia carolina L. Carolina silverbell IL (E), OH (PRX)
HADI3 Halesia diptera Ellis two-wing silverbell AR (E)
HATE3 Halesia tetraptera Ellis mountain silverbell KY (T)
HAJO Halophila johnsonii Eiseman Johnson's seagrass T
HAHA4 Haplostachys haplostachya (A. Gray) H. St. John honohono E
HAFL3 Harperocallis flava McDaniel Harper's beauty E FL (E)
HAHY2 Harrimanella hypnoides (L.) Coville mossplant ME (T)
CAHY7 Cassiope hypnoides (L.) D. Don NH (T)
HAER4 Harrisia eriophora (N.E. Pfeiffer) Britton fragrant applecactus FL (E)
HAFR3 Harrisia fragrans Small ex Britton & Rose Caribbean applecactus
CEERF Cereus eriophorus N.E. Pfeiffer & Otto var. fragrans (Small ex Britton & Rose) L.D. Benson E
HAGR13 Harrisia gracilis (Mill.) Britton [excluded] FL (E)
HAPO2 Harrisia portoricensis Britton Puerto Rico applecactus T
HAFL4 Hartwrightia floridana A. Gray ex S. Watson Florida hartwrightia FL (T), GA (T)
HARO Hasteola robertiorum L.C. Anderson hammockherb FL (E)
HASU3 Hasteola suaveolens (L.) Pojark. false Indian plantain MD (E)
CASU Cacalia suaveolens L. CT (E), IA (T), MN (E), NY (E), RI (H)
SYSU Synosma suaveolens (L.) Raf. ex Britton TN (T)
HABRB Hastingsia bracteosa S. Watson var. bracteosa largeflower rushlily OR (T)
HEDI Hedeoma diffusa Greene spreading false pennyroyal AZ (SR)
HEHI Hedeoma hispida Pursh rough false pennyroyal KY (T), NY (T), OH (T)
HEPU Hedeoma pulegioides (L.) Pers. American false pennyroyal RI (SC)
HETO2 Hedeoma todsenii Irving Todsen's false pennyroyal E NM (E)
HECO13 Hedyotis cookiana (Cham. & Schltdl.) Steud. 'awiwi E
HECO14 Hedyotis coriacea Sm. kio'ele E
HEDE3 Hedyotis degeneri Fosberg Waianae Range starviolet E
HEMA8 Hedyotis mannii Fosberg pilo E
HEPA14 Hedyotis parvula (A. Gray) Fosberg rockface starviolet E
HESCR7 Hedyotis schlechtendahliana Steud. ssp. remyi (Hillebr.) Fosberg kopa
HESCR3 Hedyotis schlechtendahliana Steud. var. remyi (Hillebr.) Fosberg E
HEST2 Hedyotis st.-johnii B.C. Stone & M.A. Lane Napali Beach starviolet E
HEAL Hedysarum alpinum L. alpine sweetvetch ME (SC), MI (E)
HEBR Helenium brevifolium (Nutt.) Alph. Wood shortleaf sneezeweed NC (E), TN (E)
HEVE Helenium vernale Walter savannah sneezeweed NC (E)
HEVI6 Helenium virginicum S.F. Blake Virginia sneezeweed T VA (E)
HEBI2 Helianthemum bicknellii Fernald hoary frostweed KY (T), MD (E), OH (T), PA (E), TN (PX, E), VT (T)
HECA3 Helianthemum canadense (L.) Michx. longbranch frostweed KY (E), TN (PX, E)
HEDU Helianthemum dumosum (E.P. Bicknell) Fernald bushy frostweed CT (SC), MA (SC), NY (T), RI (E)
HEGR2 Helianthemum greenei B.L. Rob. island rushrose T
HEPR Helianthemum propinquum E.P. Bicknell low frostweed CT (E), RI (SC), TN (SC)
HEAN2 Helianthus angustifolius L. swamp sunflower IL (T), NY (T), PA (X)
HECA14 Helianthus carnosus Small lakeside sunflower FL (E)
HEDI2 Helianthus divaricatus L. woodland sunflower RI (SC)
HEEG Helianthus eggertii Small Eggert's sunflower KY (T), TN (T)
HEGI Helianthus giganteus L. giant sunflower IL (E)
HEGL2 Helianthus glaucophyllus D.M. Sm. whiteleaf sunflower TN (T)
HELA2 Helianthus laevigatus Torr. & A. Gray smooth sunflower MD (E)
HEMI3 Helianthus microcephalus Torr. & A. Gray small woodland sunflower MD (E), MI (PREX)
HEMO2 Helianthus mollis Lam. ashy sunflower MI (T), OH (T)
HENIT Helianthus niveus (Benth.) Brandegee ssp. tephrodes (A. Gray) Heiser Algodones sunflower CA (E)
HEOC2 Helianthus occidentalis Riddell fewleaf sunflower MD (T)
HEPA2 Helianthus paradoxus Heiser paradox sunflower T NM (E), TX (T)
HESC3 Helianthus schweinitzii Torr. & A. Gray Schweinitz's sunflower E NC (E)
HESI Helianthus silphioides Nutt. rosinweed sunflower KY (E)
HEST Helianthus strumosus L. paleleaf woodland sunflower VT (T)
HEVE3 Helianthus ×verticillatus E.E. Watson (pro sp.) [angustifolius × grosseserratus] TN (E)
HEFR2 Heliotropium fruticosum L. Key West heliotrope FL (E)
HETE3 Heliotropium tenellum (Nutt.) Torr. pasture heliotrope IL (E), IN (T)
HEBU Helonias bullata L. swamppink T GA (T), MD (E), NJ (E), NC (SC, T), VA (E)
HENO2 Hepatica nobilis Schreb. hepatica FL (E)
HENOA Hepatica nobilis Schreb. var. acuta (Pursh) Steyerm. sharplobe hepatica ME (PX)
HEAC4 Hepatica acutiloba DC. CT (T)
HENOO Hepatica nobilis Schreb. var. obtusa (Pursh) Steyerm. roundlobe hepatica
HEAM8 Hepatica americana (DC.) Ker Gawl. RI (SC)
HEMA80 Heracleum maximum Bartram common cowparsnip TN (SC)
HELA4 Heracleum lanatum Michx. KY (E)
HETU2 Herzogiella turfacea (Lindb.) Z. Iwats. herzodiella moss KY (E)
HEUN2 Hesperocallis undulata A. Gray desert lily AZ (SR)
HEAB2 Hesperocyparis abramsiana (C.B. Wolf) Bartel Santa Cruz cypress
CUAB Cupressus abramsiana C.B. Wolf Santa Cruz cypress E CA (E)
HEAR22 Hesperocyparis arizonica (Greene) Bartel Arizona cypress
CUAR Cupressus arizonica Greene Arizona cypress NV (CY)
HEGO3 Hesperocyparis goveniana (Gordon) Bartel Gowen cypress
CUGOG Cupressus goveniana Gord. ssp. goveniana Gowen cypress T
HECO12 Hesperolinon congestum (A. Gray) Small Marin dwarf-flax T CA (T)
HEDI3 Hesperolinon didymocarpum H. Sharsm. Lake County dwarf-flax CA (E)
HEAR9 Hesperomannia arborescens A. Gray Lanai island-aster E
HEAR10 Hesperomannia arbuscula Hillebr. Maui island-aster E
HELY Hesperomannia lydgatei Forbes Kauai island-aster E
HECOC8 Hesperostipa comata (Trin. & Rupr.) Barkworth ssp. comata needle and thread
STCO4 Stipa comata Trin. & Rupr. IN (X)
HESP11 Hesperostipa spartea (Trin.) Barkworth porcupinegrass
STSP2 Stipa spartea Trin. OH (T)
HEWH Hesperoyucca whipplei (Torr.) Baker chaparral yucca
YUWHW Yucca whipplei Torr. var. whipplei AZ (SR)
HEDU2 Heteranthera dubia (Jacq.) MacMill. grassleaf mudplantain KY (SC), NH (E)
ZODU Zosterella dubia (Jacq.) Small ME (T)
HELI2 Heteranthera limosa (Sw.) Willd. blue mudplantain KY (SC), MN (T), TN (T)
HEMU5 Heteranthera multiflora (Griseb.) Horn bouquet mudplantain PA (E)
HERE Heteranthera reniformis Ruiz & Pav. kidneyleaf mudplantain CT (SC), IL (E), OH (E)
HESU3 Heterotheca subaxillaris (Lam.) Britton & Rusby camphorweed
HESUL Heterotheca subaxillaris (Lam.) Britton & Rusby var. latifolia (Buckley) Gandhi & R.D. Thomas KY (T)
HEVIV Heterotheca villosa (Pursh) Shinners var. villosa hairy false goldenaster
CHVI10 Chrysopsis villosa (Pursh) Nutt. ex DC. IN (T)
HEGRT Heuchera grossulariifolia Rydb. var. tenuifolia (Wheelock) C.L. Hitchc. gooseberryleaf alumroot WA (S)
HELO5 Heuchera longiflora Rydb. longflower alumroot OH (PRX)
HELOA Heuchera longiflora Rydb. var. aceroides (Rydb.) Rosend., Butters & Lakela TN (SC)
HEVI2 Heuchera villosa Michx. hairy alumroot MD (E, X), OH (T)
HENI2 Hexalectris nitida L.O. Williams Glass Mountain crested coralroot NM (E)
HESP3 Hexalectris spicata (Walter) Barnhart spiked crested coralroot AZ (SR), FL (E), IL (E), IN (R), MD (E, X), NM (E), OH (T)
HEWA Hexalectris warnockii Ames & Correll Texas crested coralroot AZ (HS)
HEAR6 Hexastylis arifolia (Michx.) Small littlebrownjug FL (T)
HECO19 Hexastylis contracta Blomquist mountain heartleaf KY (E), NC (E), TN (SC)
HEHE12 Hexastylis heterophylla (Ashe) Small variableleaf heartleaf KY (SC)
HENA3 Hexastylis naniflora Blomquist dwarfflower heartleaf T NC (T)
HESHH Hexastylis shuttleworthii (Britten & Baker f.) Small var. harperi Gaddy largeflower heartleaf GA (U)
HEVI3 Hexastylis virginica (L.) Small Virginia heartleaf MD (E), TN (SC)
HIDI Hibiscadelphus distans Bishop & D.R. Herbst Kauai hau kuahiwi E
HIGI Hibiscadelphus giffardianus Rock Kilauea hau kuahiwi E
HIHU Hibiscadelphus hualalaiensis Rock Hualalai hau kuahiwi E
HIWO Hibiscadelphus woodii D.H. Lorence & W.L. Wagner Wood's hau kuahiwi E
HIARI Hibiscus arnottianus A. Gray ssp. immaculatus (Roe) D.M. Bates white rosemallow E
HIBR Hibiscus brackenridgei A. Gray Brackenridge's rosemallow E
HICL Hibiscus clayi O. Deg. & I. Deg. red Kauai rosemallow E
HILA6 Hibiscus lasiocarpos Cav. rosemallow IN (E)
HIPO Hibiscus poeppigii (Spreng.) Garcke Poeppig's rosemallow FL (E)
HIWAH Hibiscus waimeae A. Heller ssp. hannerae (O. Deg. & I. Deg.) D.M. Bates white Kauai rosemallow E
HICA3 Hieracium canadense Michx. Canadian hawkweed OH (T)
HIGR5 Hieracium greenii Porter & Britton Maryland hawkweed
HITR5 Hieracium traillii Greene PA (E)
HIGR3 Hieracium gronovii L. queendevil ME (PX)
HIKA2 Hieracium kalmii L. Kalm's hawkweed NJ (E)
HILO2 Hieracium longipilum Torr. hairy hawkweed KY (T), OH (PRX), TN (SC)
HIRO4 Hieracium robinsonii (Zahn) Fernald Robinson's hawkweed ME (PX), NH (E)
HISC Hieracium scabrum Michx. rough hawkweed TN (T)
HIUM Hieracium umbellatum L. narrowleaf hawkweed NH (E)
HIVE Hieracium venosum L. rattlesnakeweed ME (E)
HIOD Hierochloe odorata (L.) P. Beauv. sweetgrass MD (E), NC (E), PA (E)
HIMA2 Hippomane mancinella L. manchineel FL (E)
HIVU2 Hippuris vulgaris L. common mare's-tail IN (X), ME (SC), NH (T), NY (E), VT (E)
HOTE Hoffmannseggia tenella Tharp & L.O. Williams slender rushpea E TX (E)
HOPE2 Holmgrenanthe petrophila (Coville & Morton) Elisens rocklady
MAPE Maurandya petrophila Coville & Morton CA (R)
HOMA Holocarpha macradenia (DC.) Greene Santa Cruz tarplant T CA (E)
HOSH Homaliadelphus sharpii (R.S. Williams) Sharp Sharp's homaliadelphus moss TN (E)
HOPE Honckenya peploides (L.) Ehrh. seaside sandplant CT (SC), MD (E, X)
HOPER2 Honckenya peploides (L.) Ehrh. ssp. robusta (Fernald) Hultén seaside sandplant NH (E)
HOPER4 Honckenya peploides (L.) Ehrh. var. robusta (Fernald) House RI (SC)
HOPU Hordeum pusillum Nutt. little barley PA (X)
HOIN Hottonia inflata Elliot American featherfoil CT (SC), IN (T), ME (T), MD (E), NJ (E), NY (T), OH (PRX), PA (X), RI (SC), TN (SC)
HOLO Houstonia longifolia Gaertn. longleaf summer bluet CT (E), ME (SC), MA (E)
HELO7 Hedyotis longifolia (Gaertn.) Hook. RI (H)
HOPUC Houstonia purpurea L. var. calycosa A. Gray Venus' pride NY (E)
HOPUM Houstonia purpurea L. var. montana (Small) Terrell Venus' pride NC (E)
HEPUM2 Hedyotis purpurea (L.) Torr. & A. Gray var. montana (Small) Fosberg E TN (E)
HOPUP3 Houstonia purpurea L. var. purpurea Venus' pride NY (E)
HOSE2 Houstonia serpyllifolia Michx. thymeleaf bluet KY (E)
HEMI15 Hedyotis michauxii Fosberg PA (X)
HOAQ Howellia aquatilis A. Gray water howellia T WA (T)
HUER Hudsonia ericoides L. pine barren goldenheather CT (E), NH (T), RI (SC)
HUMO Hudsonia montana Nutt. mountain goldenheather T NC (E)
HUTO Hudsonia tomentosa Nutt. woolly beachheather CT (T), IL (E), IN (T), IA (E), NH (T), OH (PRX), VT (E)
HUAP Huperzia appalachiana Beitel & Mickel Appalachian clubmoss ME (SC), MI (E), NY (T), TN (T)
HUDI Huperzia dichotoma (Jacq.) Trevis. hanging clubmoss
LYDI2 Lycopodium dichotomum Jacq. FL (E)
HULU2 Huperzia lucidula (Michx.) Trevis. shining clubmoss NY (EV)
HUMA Huperzia mannii (Hillebr.) Kartesz & Gandhi Mann's clubmoss E
HUNU Huperzia nutans (Brack.) Rothm. nodding clubmoss
LYNU2 Lycopodium nutans Brack. E
HUPO2 Huperzia porophila (Lloyd & Underw.) Holub rock clubmoss MD (E, X), MN (T), PA (E)
LYPO Lycopodium porophilum Lloyd & Underw. IA (T)
HUSE Huperzia selago (L.) Bernh. ex Schrank & Mart. fir clubmoss ME (T), MA (E), NY (E), PA (X)
HUSES Huperzia selago (L.) Bernh. ex Schrank & Mart. var. selago fir clubmoss
LYSE Lycopodium selago L. CT (SC)
HYCO6 Hybanthus concolor (T.F. Forst.) Spreng. eastern greenviolet CT (SC), FL (E), IA (T), NJ (E)
HYAR Hydrangea arborescens L. wild hydrangea FL (E), NY (E)
HYCA Hydrastis canadensis L. goldenseal CT (E), GA (E), MD (T), MA (E), MI (T), MN (E), NJ (E), NY (T), NC (SC, E), PA (V), TN (SC, CE), VT (E)
HYAM Hydrocotyle americana L. American marshpennywort IN (E), KY (E), TN (E)
HYRA Hydrocotyle ranunculoides L. f. floating marshpennywort IL (E), NJ (E), NY (E)
HYUM Hydrocotyle umbellata L. manyflower marshpennywort CT (E), OH (E), PA (X)
HYVE2 Hydrocotyle verticillata Thunb. whorled marshpennywort CT (SC), MA (T), NY (E), RI (H)
HYOV Hydrolea ovata Nutt. ex Choisy ovate false fiddleleaf KY (E), TN (SC)
HYUN Hydrolea uniflora Raf. oneflower false fiddleleaf IL (E), KY (SC)
HYCA3 Hydrophyllum canadense L. bluntleaf waterleaf MA (E), NJ (E), VT (T)
HYMA Hydrophyllum macrophyllum Nutt. largeleaf waterleaf MD (T), PA (E)
HYVI Hydrophyllum virginianum L. eastern waterleaf CT (SC), KY (SC), NH (T), TN (T)
HYTE9 Hylotelephium telephioides (Michx.) H. Ohba Allegheny stonecrop
SETE Sedum telephioides Michx. IN (T), KY (T), NY (E), PA (R)
HYCA9 Hymenocallis caroliniana (L.) Herbert Carolina spiderlily
HYCO5 Hymenocallis coronaria (J. Le Conte) Kunth GA (E)
HYGO2 Hymenocallis godfreyi G. Lom. Sm. & M. Darst Godfrey's spiderlily FL (E)
HYHE2 Hymenocallis henryae Traub ex J.E. Laferriere Henry's spiderlily FL (E)
HYTE5 Hymenoxys texana (J.M. Coult. & Rose) Cockerell prairiedawn E TX (E)
HYTR Hypelate trifoliata Sw. inkwood FL (E)
HYAD Hypericum adpressum Raf. ex W. Bartram creeping St. Johnswort CT (SC), IL (E), IN (E), KY (H), MD (E), MA (T), NJ (E), NY (E), PA (X), RI (T), TN (T)
HYAS80 Hypericum ascyron L. great St. Johnswort ME (PX), MA (E), VT (T)
HYPY Hypericum pyramidatum Aiton CT (T), IN (E), MD (E, X), NH (T)
HYBO2 Hypericum boreale (Britton) E.P. Bicknell northern St. Johnswort IA (E), OH (T)
HYCA7 Hypericum canadense L. lesser Canadian St. Johnswort OH (E)
HYCR3 Hypericum crux-andreae (L.) Crantz St. Peterswort KY (T)
HYST3 Hypericum stans (Michx. ex Willd.) P. Adams & N. Robson PA (X)
HYCU Hypericum cumulicola (Small) P. Adams highlands scrub St. Johnswort E FL (E)
HYDE Hypericum densiflorum Pursh bushy St. Johnswort NY (E), PA (T)
HYDE2 Hypericum denticulatum Walter coppery St. Johnswort IN (T), MD (E), NY (E), OH (E), PA (X)
HYDO Hypericum dolabriforme Vent. straggling St. Johnswort IN (R)
HYDR Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray nits and lice MD (E, X), PA (X)
HYED Hypericum edisonianum (Small) P. Adams & N. Robson Arcadian St. Johnswort FL (E)
HYEL Hypericum ellipticum Hook. pale St. Johnswort OH (T), TN (E)
HYFR Hypericum frondosum Michx. cedarglade St. Johnswort IN (X)
HYGE Hypericum gentianoides (L.) Britton, Sterns & Poggenb. orangegrass IA (E)
HYGR3 Hypericum graveolens Buckley mountain St. Johnswort TN (E)
HYGY Hypericum gymnanthum Engelm. & A. Gray claspingleaf St. Johnswort IN (E), MD (E), OH (E), PA (X)
HYHYM Hypericum hypericoides (L.) Crantz ssp. multicaule (Michx. ex Willd.) N. Robson St. Andrew's cross MA (E), NY (E)
HYKA Hypericum kalmianum L. Kalm's St. Johnswort IL (E), OH (T)
HYLI4 Hypericum lissophloeus P. Adams smoothbark St. Johnswort FL (E)
HYMA2 Hypericum majus (A. Gray) Britton large St. Johnswort NJ (E), PA (T), WA (S)
HYMI Hypericum mitchellianum Rydb. Blue Ridge St. Johnswort TN (T)
HYNU Hypericum nudiflorum Michx. ex Willd. early St. Johnswort KY (H)
HYPR Hypericum prolificum L. shrubby St. Johnswort NJ (E), NY (T)
HYPS Hypericum pseudomaculatum Bush false spotted St. Johnswort KY (H)
HYSP2 Hypericum sphaerocarpum Michx. roundseed St. Johnswort MI (T), WI (T)
HYHI2 Hypoxis hirsuta (L.) Coville common goldstar ME (PX), NH (T)
ILAM2 Ilex amelanchier M.A. Curtis ex Chapm. sarvis holly FL (T)
ILCO2 Ilex collina Alexander longstalk holly NC (T), VA (E)
NECO6 Nemopanthus collinus (Alexander) R. Clark TN (SC)
ILCO3 Ilex cookii Britton & P. Wilson te E PR (E)
ILGL Ilex glabra (L.) A. Gray inkberry CT (T), ME (T), NY (EV), PA (X)
ILKR Ilex krugiana Loes. tawnyberry holly FL (T)
ILLA Ilex laevigata (Pursh) A. Gray smooth winterberry ME (SC), NY (EV)
ILMO Ilex montana Torr. & A. Gray ex A. Gray mountain holly MA (E), NJ (E), NY (EV)
ILOP Ilex opaca Aiton American holly NY (EV), PA (T)
ILSI2 Ilex sintenisii (Urb.) Britton Sintenis' holly E PR (E)
ILVE Ilex verticillata (L.) A. Gray common winterberry AR (T), IA (E), NY (EV)
ILLO2 Iliamna longisepala (Torr.) Wiggins longsepal wild hollyhock WA (S)
ILRIR Iliamna rivularis (Douglas ex Hook.) Greene var. rivularis streambank wild hollyhock
ILCO4 Iliamna corei Sherff E VA (E)
ILRE Iliamna remota Greene IL (E), IN (E)
ILFL Illicium floridanum Ellis Florida anisetree GA (E)
ILPA Illicium parviflorum Michx. ex Vent. yellow anisetree FL (E)
IMPA Impatiens pallida Nutt. pale touch-me-not ME (SC)
INMI Indigofera miniata Ortega coastal indigo
INMIL Indigofera miniata Ortega var. leptosepala (Nutt. ex Torr. & A. Gray) B.L. Turner AR (T)
INOX Indigofera oxycarpa Desv. Asian indigo
INKE Indigofera keyensis Small FL (E)
IOPI Iodanthus pinnatifidus (Michx.) Steud. purplerocket MN (E), PA (E)
IOLI2 Ionactis linariifolius (L.) Greene flaxleaf whitetop aster
ASLI2 Aster linariifolius L. IA (T)
IOUT Ionopsis utricularioides (Sw.) Lindl. delicate violet orchid FL (E)
IPMI Ipomoea microdactyla Griseb. calcareous morning-glory FL (E)
IPPA Ipomoea pandurata (L.) G. Mey. man of the earth MI (T), NY (E)
IPTE2 Ipomoea tenuissima Choisy rockland morning-glory FL (E)
IPSA2 Ipomopsis sancti-spiritus Wilken & Fletcher Holy Ghost ipomopsis E NM (E)
IRRH Iresine rhizomatosa Standl. Juda's bush IL (E), IN (R), MD (E)
IRBR2 Iris brevicaulis Raf. zigzag iris OH (E), TN (E)
IRCR Iris cristata Aiton dwarf crested iris MD (E), PA (E)
IRFU Iris fulva Ker Gawl. copper iris KY (E), TN (T)
IRLA Iris lacustris Nutt. dwarf lake iris T MI (T), WI (T)
IRPR Iris prismatica Pursh ex Ker Gawl. slender blue iris ME (T), MD (E), NH (T), NY (T), PA (E), TN (T)
IRVE Iris verna L. dwarf violet iris MD (E), OH (T), PA (E)
IRVI Iris virginica L. Virginia iris PA (E)
IRVIS Iris virginica L. var. shrevei (Small) E.S. Anderson Shreve's iris NY (E)
ISBY Ischaemum byrone (Trin.) Hitchc. Hilo murainagrass E
ISHO2 Isodendrion hosakae H. St. John cindercone isodendrion E
ISLA3 Isodendrion laurifolium A. Gray rockcliff isodendrion E
ISLO2 Isodendrion longifolium A. Gray longleaf isodendrion T
ISPY Isodendrion pyrifolium A. Gray wahine noho kula E
ISAC Isoetes acadiensis Kott Acadian quillwort ME (T), MA (E)
ISAP Isoetes appalachiana D.F. Brunton & D.M. Britton Appalachian quillwort FL (E)
ISBO2 Isoetes boomii N. Luebke Boom's quillwort FL (E)
ISBU Isoetes butleri Engelm. limestone quillwort IL (E), KY (E)
ISEN Isoetes engelmannii A. Braun Appalachian quillwort IN (E), MI (E), OH (E), RI (SC), VT (T)
ISHY Isoetes hyemalis D.F. Brunton evergreen quillwort FL (E)
ISLA Isoetes lacustris L. lake quillwort MA (E), NJ (E), NY (R), TN (E)
ISLO Isoetes louisianensis Thieret Louisiana quillwort E
ISMA Isoetes macrospora Durieu big-spore quillwort NH (T)
ISME Isoetes melanopoda Gay & Durieu ex Durieu blackfoot quillwort IN (E), IA (E), KY (E), MN (E), NJ (E), TN (E)
ISME3 Isoetes melanospora Engelm. blackspore quillwort E GA (E)
ISNU Isoetes nuttallii A. Braun ex Engelm. Nuttall's quillwort WA (S)
ISPI Isoetes piedmontana (N.E. Pfeiffer) C.F. Reed Peidmont quillwort NC (T)
ISPR Isoetes prototypus D.M. Britton spike quillwort ME (T)
ISRI Isoetes riparia Engelm. ex A. Braun shore quillwort ME (PX), NH (T), NY (E), RI (SC)
ISTE Isoetes tegetiformans Rury Merlin's grass E GA (E)
ISTE5 Isoetes tenella Léman spiny-spore quillwort
ISEC Isoetes echinospora Durieu OH (PRX), RI (SC)
ISTU Isoetes tuckermanii A. Braun Tuckerman's quillwort NJ (E)
ISME2 Isotria medeoloides (Pursh) Raf. small whorled pogonia T CT (E), GA (T), IL (E), ME (E), MD (E, X), MA (E), MI (E), MO (E), NH (E), NJ (E), NY (E), NC (E), OH (E), PA (E), RI (E), TN (E), VT (E), VA (E)
ISVE Isotria verticillata Raf. large whorled pogonia FL (E), IL (E), ME (PX), MI (T), NH (E), NY (EV), VT (T)
ITVI Itea virginica L. Virginia sweetspire IN (E), PA (X)
IVFR Iva frutescens L. Jesuit's bark ME (E)
IVFRO2 Iva frutescens L. ssp. oraria (Bartlett) R.C. Jacks. Jesuit's bark NH (T)
IVCA Ivesia callida (H.M. Hall) Rydb. Tahquitz mousetail CA (R)
IVKI Ivesia kingii S. Watson King's mousetail
IVKIE Ivesia kingii S. Watson var. eremica (Coville) Ertter T NV (FP)
IVRHR Ivesia rhypara Ertter & Reveal var. rhypara grimy mousetail OR (E)
JACU4 Jacquemontia curtissii Peter ex Small pineland clustervine FL (T)
JAHA Jacquemontia havanensis (Jacq.) Urb. Havana clustervine FL (E)
JAPE Jacquemontia pentanthos (Jacq.) G. Don skyblue clustervine FL (E)
JARE Jacquemontia reclinata House beach clustervine E FL (E)
JAKE Jacquinia keyensis Mez joewood FL (T)
JACO Jatropha costaricensis G.L. Webster & Poveda Costa Rican jatropha E
JEDI Jeffersonia diphylla (L.) Pers. twinleaf GA (E), IA (T), NJ (E), NY (T)
JUCI Juglans cinerea L. butternut KY (SC), NY (EV), TN (T)
JUJA Juglans jamaicensis C. DC. West Indian walnut E
JUAL4 Juncus alpinoarticulatus Chaix northern green rush ME (T)
JUALN Juncus alpinoarticulatus Chaix ssp. nodulosus (Wahlenb.) Hämet-Ahti northern green rush
JUAL Juncus alpinus auct. non Vill. IL (E), PA (T)
JUAM3 Juncus ambiguus Guss. seasice rush NY (E)
JUARL Juncus arcticus Willd. ssp. littoralis (Engelm.) Hultén mountain rush
JUBA Juncus balticus Willd. MD (E, X), PA (T)
JUBAL Juncus balticus Willd. var. littoralis Engelm. IN (R)
JUAR4 Juncus articulatus L. jointleaf rush IN (E), KY (SC)
JUBI Juncus biflorus Elliot bog rush PA (T)
JUMAB Juncus marginatus Rostk. var. biflorus (Elliot) Alph. Wood NY (E)
JUBR Juncus brachycarpus Engelm. whiteroot rush MI (T), NJ (E), NY (E), PA (E)
JUBR2 Juncus brachycephalus (Engelm.) Buchenau smallhead rush MD (E, X), PA (T), TN (SC)
JUCA2 Juncus caesariensis Coville New Jersey rush MD (E), NJ (E), NC (E)
JUCO4 Juncus coriaceus Mack. leathery rush NJ (E)
JUDE Juncus debilis A. Gray weak rush CT (SC), MA (E), NY (E), RI (T)
JUDI Juncus dichotomus Elliot forked rush PA (E)
JUPL2 Juncus platyphyllus (Wiegand) Fernald OH (E)
JUDI2 Juncus diffusissimus Buckley slimpod rush OH (E)
JUDU2 Juncus dudleyi Wiegand Dudley's rush ME (SC)
JUEL Juncus elliottii Chapm. Elliott's rush KY (H), NJ (E)
JUEN Juncus ensifolius Wikstr. swordleaf rush NY (E)
JUFI Juncus filiformis L. thread rush MA (E), PA (R)
JUFI2 Juncus filipendulus Buckley ringseed rush KY (T)
JUGR Juncus greenei Oakes & Tuck. Greene's rush OH (E), PA (X), VT (E)
JUGY Juncus gymnocarpus Coville Pennsylvania rush FL (E), PA (R), TN (SC)
JUHEH Juncus hemiendytus F.J. Herm. var. hemiendytus Herman's dwarf rush WA (S)
JUIN2 Juncus interior Wiegand inland rush OH (E)
JUKE Juncus kelloggii Engelm. Kellogg's dwarf rush WA (T)
JULO2 Juncus longii Fernald Long's rush MD (E)
JUME Juncus megacephalus M.A. Curtis bighead rush MD (E, X)
JUMI2 Juncus militaris Bigelow bayonet rush IN (X), MD (E, X), MI (T), PA (E), VT (E)
JUPE Juncus pelocarpus E. Mey. brownfruit rush IN (T), MD (E)
JUSC Juncus scirpoides Lam. needlepod rush IN (T), MI (T), NY (E), PA (E)
JUSE Juncus secundus P. Beauv. ex Poir. lopsided rush IN (E), ME (SC), NH (E), OH (T), VT (E)
JUST Juncus stygius L. moor rush ME (SC), MI (T), WI (E)
JUSTA Juncus stygius L. ssp. americanus (Buchenau) Hultén moor rush NY (E)
JUSU Juncus subcaudatus (Engelm.) Coville & S.F. Blake woodland rush NY (E)
JUSU2 Juncus subtilis E. Mey. greater creeping rush ME (T)
JUTI Juncus tiehmii Ertter Nevada rush WA (T)
JUTO Juncus torreyi Coville Torrey's rush ME (PX), MD (E), NJ (E), PA (E), VT (E)
JUTR2 Juncus trifidus L. highland rush MD (E), NY (T), TN (PX, E)
JUTRC Juncus trifidus L. ssp. carolinianus Hämet-Ahti NC (E)
JUVA Juncus vaseyi Engelm. Vasey's rush IL (E), ME (E), MI (T)
JUCA7 Juniperus californica Carričre California juniper NV (CY)
JUCO6 Juniperus communis L. common juniper IL (T), IN (R), MD (E, X), OH (E)
JUCOD Juniperus communis L. var. depressa Pursh common juniper KY (T)
JUGR7 Juniperus grandis R.P. Adams western juniper
JUOCA Juniperus occidentalis Hook. var. australis (Vasek) A.H. Holmgren & N.H. Holmgren western juniper NV (CY)
JUHO2 Juniperus horizontalis Moench creeping juniper IL (E), IA (T), NH (E), NY (E), VT (T)
JUOC Juniperus occidentalis Hook. western juniper
JUOCO Juniperus occidentalis Hook. var. occidentalis western juniper NV (CY)
JUOS Juniperus osteosperma (Torr.) Little Utah juniper NV (CY)
JUSC2 Juniperus scopulorum Sarg. Rocky Mountain juniper NV (CY)
JUAM Justicia americana (L.) Vahl American water-willow IA (E), MI (T)
JUCO8 Justicia cooleyi Monachino & Leonard Cooley's water-willow E FL (E)
JUCR Justicia crassifolia (Chapm.) Chapm. ex Small thickleaf water-willow FL (E)
JUOV Justicia ovata (Walter) Lindau looseflower water-willow IL (E)
KAAN Kalmia angustifolia L. sheep laurel NY (EV)
KACA2 Kalmia carolina Small Carolina laurel
KAANC Kalmia angustifolia L. var. carolina (Small) Fernald TN (PX, E)
KACU Kalmia cuneata Michx. whitewicky NC (SC, E)
KALA Kalmia latifolia L. mountain laurel FL (T), ME (SC), NY (EV)
KAPO Kalmia polifolia Wangenh. bog laurel NJ (E), NY (EV), RI (T)
KAKA Kanaloa kahoolawensis D.H. Lorence & K.R. Wood kanaloa E
KOVI2 Koanophyllon villosum (Sw.) King & H. Rob. Florida Keys thoroughwort
EUVI4 Eupatorium villosum Sw. FL (E)
KOMA Koeleria macrantha (Ledeb.) Schult. prairie Junegrass KY (E), OH (E)
KOCR Koeleria cristata auct. non Pers. p.p. PA (X)
KOCO2 Kokia cookei O. Deg. Molokai treecotton E
KODR Kokia drynarioides (Seem.) Lewt. Hawai'i treecotton E
KOKA Kokia kauaiensis (Rock) O. Deg. & Duvel Kauai treecotton E
KODE2 Kosteletzkya depressa (L.) O.J. Blanch., Fryxell & D.M. Bates white fenrose FL (E)
KRBI Krigia biflora (Walter) S.F. Blake twoflower dwarfdandelion CT (SC)
KRCA Krigia caespitosa (Raf.) K.L. Chambers weedy dwarfdandelion
KROP2 Krigia oppositifolia Raf. IN (T)
KRDA Krigia dandelion (L.) Nutt. potato dwarfdandelion MD (E), NJ (E), OH (T)
KRMO Krigia montana (Michx.) Nutt. mountain dwarfdandelion TN (T)
KROC Krigia occidentalis Nutt. western dwarfdandelion KY (E)
KRVI Krigia virginica (L.) Willd. Virginia dwarfdandelion IA (E), ME (PX), OH (T)
KUCO Kumlienia cooleyae (Vasey & Rose) Greene Cooley's false buttercup
RACO2 Ranunculus cooleyae Vasey & Rose WA (S)
KYPU Kyllinga pumila Michx. low spikesedge MD (E)
CYTE2 Cyperus tenuifolius (Steud.) Dandy NJ (E)
LACY Labordia cyrtandrae (Baill.) H. St. John Koolau Range labordia E
LALY2 Labordia lydgatei Forbes Wahiawa Mountain labordia E
LATIL Labordia tinifolia A. Gray var. lanaiensis Sherff Lanai labordia E
LATIW2 Labordia tinifolia A. Gray var. wahiawaensis H. St. John Wahiawa labordia E
LATR4 Labordia triflora Hillebr. three-flower labordia E
LACA5 Lachnanthes caroliana (Lam.) Dandy Carolina redroot CT (E), MD (E), MA (SC), NY (E), RI (T), TN (E)
LAAN Lachnocaulon anceps (Walter) Morong whitehead bogbutton TN (E)
LADI5 Lachnocaulon digynum Koern. pineland bogbutton FL (T)
LAFL Lactuca floridana (L.) Gaertn. woodland lettuce MI (T), NY (E)
LAHI Lactuca hirsuta Muhl. ex Nutt. hairy lettuce IL (T), MD (E, X), NY (E), OH (E), VT (T)
LALU Lactuca ludoviciana (Nutt.) Riddell biannual lettuce IN (X)
LATAP Lactuca tatarica (L.) C.A. Mey. var. pulchella (Pursh) Breitung blue lettuce
LAPU Lactuca pulchella (Pursh) DC. MI (T)
LACA8 Lantana canescens Kunth hammock shrubverbena FL (E)
LADE Lantana depressa Small depressed shrubverbena FL (E)
LALA Larix laricina (Du Roi) K. Koch tamarack IL (T), MD (E), RI (T)
LABU Lasthenia burkei (Greene) Greene Burke's baeria E CA (E)
LACO6 Lasthenia conjugens Greene Contra Costa goldfields E
LAHO2 Lathyrus holochlorus (Piper) C.L. Hitchc. thinleaf pea WA (T)
LAJA Lathyrus japonicus Willd. beach pea OH (T), PA (T)
LAJAM Lathyrus japonicus Willd. var. maritimus (L.) Kartesz & Gandhi beach pea
LAJAG Lathyrus japonicus Willd. var. glaber (Ser.) Fernald IL (E)
LAMA3 Lathyrus maritimus Bigelow VT (T)
LAMAG2 Lathyrus maritimus Bigelow var. glaber (Ser.) Eames IN (E)
LAOC2 Lathyrus ochroleucus Hook. cream pea IL (T), IN (E), NJ (E), OH (T), PA (T)
LAPA4 Lathyrus palustris L. marsh pea KY (T), MD (E, X), PA (E), TN (SC), VT (T)
LATO Lathyrus torreyi A. Gray Torrey's pea WA (T)
LAVE Lathyrus venosus Muhl. ex Willd. veiny pea IN (T), KY (SC), NJ (E), NY (E), OH (E)
LACA4 Layia carnosa (Nutt.) Torr. & A. Gray beach tidytips E CA (E)
LEEXE Leavenworthia exigua Rollins var. exigua Tennessee gladecress GA (T), TN (SC)
LEEXL Leavenworthia exigua Rollins var. laciniata Rollins Tennessee gladecress KY (T)
LEEXL2 Leavenworthia exigua Rollins var. lutea Rollins Tennessee gladecress TN (PX, E)
LETO Leavenworthia torulosa A. Gray necklace gladecress KY (T)
LEUN Leavenworthia uniflora (Michx.) Britton Michaux's gladecress IN (E), OH (T)
LECE Lechea cernua Small nodding pinweed FL (T)
LEDI Lechea divaricata Shuttlw. ex Britton drysand pinweed FL (E)
LEIN Lechea intermedia Leggett ex Britton largepod pinweed IL (T), IA (T), OH (T)
LELA11 Lechea lakelae Wilbur Lakela's pinweed FL (E)
LEMI Lechea minor L. thymeleaf pinweed OH (T)
LEMU3 Lechea mucronata Raf. hairy pinweed VT (E)
LEVI Lechea villosa Elliot IA (T)
LEPU4 Lechea pulchella Raf. Leggett's pinweed MI (T), OH (T), TN (E)
LEPUM Lechea pulchella Raf. var. moniliformis (E.P. Bicknell) Seymour Leggett's pinweed MA (E), NY (E)
LERA Lechea racemulosa Michx. Illinois pinweed IN (E), NY (R)
LEST Lechea stricta Leggett ex Britton prairie pinweed IN (X)
LETE Lechea tenuifolia Michx. narrowleaf pinweed ME (PX), MD (E, X), MN (E), NH (E), NJ (E), NY (T), OH (T)
LEGR Ledum groenlandicum Oeder bog Labrador tea CT (T), OH (E), PA (R)
LEHE Leersia hexandra Sw. southern cutgrass MD (E)
LELE2 Leersia lenticularis Michx. catchfly grass MD (E), OH (E)
LEBU Leiophyllum buxifolium (Bergius) Elliot sandmyrtle KY (H), PA (X)
LEFL Leitneria floridana Chapm. corkwood FL (T)
LEBL Lejeunea blomquistii R.M. Schust. TN (SC)
LECA63 Lejeunea cardoti Steph. TN (SC)
LESH9 Lejeunea sharpii (R.M. Schust.) R.M. Schust. TN (E)
LEMI6 Lemna minuta Kunth least duckweed
LEMI10 Lemna minima Phil., non Thuill. ex P. Beauv. IN (E)
LEOB2 Lemna obscura (Austin) Daubs little duckweed PA (X)
LEPE Lemna perpusilla Torr. minute duckweed IN (X), NJ (E), NY (E)
LETR Lemna trisulca L. star duckweed MD (E)
LEVA Lemna valdiviana Phil. valdivia duckweed IN (X), MI (PREX), NH (E), NJ (E), NY (E), PA (X)
LELA42 Leochilus labiatus (Sw.) Kuntze [excluded] lipped orchid FL (E)
LEEL2 Lepanthes eltoroensis Stimson Luquillo Mountain babyboot orchid E PR (E)
LEME Lepanthopsis melanantha (Rchb. f.) Ames tiny orchid FL (E)
LEAR5 Lepidium arbuscula Hillebr. Waianae Range pepperwort E
LEBA Lepidium barnebyanum Reveal Barneby's pepperweed E
LEDA2 Lepidium davisii Rollins Davis' pepperweed OR (T)
LEOX Lepidium oxycarpum Torr. & A. Gray forked pepperweed WA (S)
LEBU2 Lepidospartum burgessii B.L. Turner Burgess' broomsage NM (E)
LEGR6 Leptocereus grantianus Britton sebucan E PR (E)
LEFUF Leptochloa fusca (L.) Kunth ssp. fascicularis (Lam.) N. Snow bearded sprangletop MA (T)
DIMA10 Diplachne maritima E.P. Bicknell CT (E), NY (E)
LEFAM Leptochloa fascicularis (Lam.) A. Gray var. maritima (E.P. Bicknell) Gleason RI (H)
LEPA3 Leptochloa panicoides (J. Presl) Hitchc. Amazon sprangletop IN (E)
LEEX4 Leptodontium excelsum (Sull.) E. Britton leptodontium moss TN (E)
LEAP4 Leptogium appalachense Nyl. Appalachian skin lichen MN (E)
LESH4 Leptohymenium sharpii (H.A. Crum & L.E. Anderson) W.R. Buck & H.A. Crum Sharp's leptohymenium moss TN (E)
LECU11 Leptoscyphus cuneifolius (Hook.) Mitt. TN (E)
LEBO9 Leptosiphon bolanderi (A. Gray) J.M. Porter & L.A. Johnson Bolander's linanthus
LIBO2 Linanthus bolanderi (A. Gray) Greene WA (S)
LESP Lepuropetalon spathulatum Elliot petiteplant FL (E)
LEAN Lespedeza angustifolia (Pursh) Elliot narrowleaf lespedeza NY (R), PA (E), TN (T)
LECA8 Lespedeza capitata Michx. roundhead lespedeza KY (SC)
LEHI2 Lespedeza hirta (L.) Hornem. hairy lespedeza ME (PX), VT (T)
LELE5 Lespedeza leptostachya Engelm. prairie lespedeza T IL (E), IA (T), MN (T), WI (E)
LENU Lespedeza ×nuttallii Darl. (pro sp.) [hirta × violacea] ME (PX)
LEPR Lespedeza procumbens Michx. trailing lespedeza MI (PREX), NH (E)
LERE2 Lespedeza repens (L.) W. Bartram creeping lespedeza CT (SC), NY (R)
LEST5 Lespedeza stuevei Nutt. tall lespedeza IN (X), KY (SC), NY (T), PA (X)
LEVI6 Lespedeza violacea (L.) Pers. violet lespedeza NY (R), VT (T)
LEVI7 Lespedeza virginica (L.) Britton slender lespedeza NH (T), WI (T)
LECO10 Lesquerella congesta Rollins Dudley Bluffs bladderpod T
LEDE3 Lesquerella densipila Rollins Duck River bladderpod TN (T)
LEFI2 Lesquerella filiformis Rollins limestoneglade bladderpod T MO (E)
LEGL2 Lesquerella globosa (Desv.) S. Watson globe bladderpod IN (E), KY (T), TN (E)
LEKIB Lesquerella kingii S. Watson ssp. bernardina (Munz) Munz King bladderpod E
LELE9 Lesquerella lescurii (A. Gray) S. Watson Lescur's bladderpod KY (SC)
LELU Lesquerella ludoviciana (Nutt.) S. Watson foothill bladderpod IL (E), MN (E), WI (T)
LELY Lesquerella lyrata Rollins lyreleaf bladderpod T
LEPA4 Lesquerella pallida (Torr. & A. Gray) S. Watson white bladderpod E TX (E)
LEPE3 Lesquerella perforata Rollins Spring Creek bladderpod E TN (E)
LERU4 Lesquerella rubicundula Rollins tum bladderpod
LETU Lesquerella tumulosa (Barneby) Reveal E
LEST8 Lesquerella stonensis Rollins Stone River bladderpod TN (E)
LETH3 Lesquerella thamnophila Rollins & Shaw Zapata bladderpod E TX (E)
LETU7 Lesquerella tuplashensis Rollins, K. Beck & F.E. Kaplow White Bluffs bladderpod WA (E)
LEGE Lessingia germanorum Cham. San Francisco lessingia E CA (E)
LEMU Leucospora multifida (Michx.) Nutt. narrowleaf paleseed IA (E), NY (E)
LECO4 Lewisia congdonii (Rydb.) S. Clay Congdon's lewisia CA (R)
LEMO8 Leymus mollis (Trin.) Pilg. American dunegrass MA (E)
LICY Liatris cylindracea Michx. Ontario blazing star KY (T), NY (E), OH (T), TN (T)
LIGH Liatris gholsonii L.C. Anderson Gholson's blazing star FL (E)
LIHE2 Liatris helleri Porter Heller's blazing star T NC (SC, T)
LIOH Liatris ohlingerae (S.F. Blake) B.L. Rob. Florida blazing star E FL (E)
LIPR3 Liatris provincialis Godfrey Godfrey's blazing star FL (E)
LIPU Liatris punctata Hook. dotted blazing star MI (PREX)
LIPUN Liatris punctata Hook. var. nebraskana Gaiser Nebraska blazing star WI (E)
LIPY Liatris pycnostachya Michx. prairie blazing star IN (T)
LISC2 Liatris scariosa (L.) Willd. devil's bite ME (T)
LISCN Liatris scariosa (L.) Willd. var. nieuwlandii (Lunell) E.G. Voss Nieuwland's blazing star IL (T)
LISCN2 Liatris scariosa (L.) Willd. var. novae-angliae Lunell New England blazing star CT (SC), MA (SC), NJ (E), RI (E)
LIBO6 Liatris borealis Nutt. NH (E), NY (T)
LISQ Liatris squarrosa (L.) Michx. scaly blazing star MD (E), MI (PREX)
LITU3 Liatris turgida Gaiser turgid blazing star MD (E, X)
LITR Licaria triandra (Sw.) Kosterm. pepperleaf sweetwood FL (E)
LICA16 Ligusticum canadense (L.) Britton Canadian licorice-root IN (E), MD (E, X), OH (PRX), PA (E)
LISC3 Ligusticum scoticum L. Scottish licorice-root CT (E), NY (E), RI (SC)
LICA31 Lilaeopsis carolinensis J.M. Coult. & Rose Carolina grasswort NC (T)
LICH Lilaeopsis chinensis (L.) Kuntze eastern grasswort CT (SC), ME (T), NH (T), NY (T), RI (H)
LIMA7 Lilaeopsis masonii Mathias & Constance mudflat quillplant CA (R)
LISCR Lilaeopsis schaffneriana (Schltdl.) J.M. Coult. & Rose var. recurva (A.W. Hill) Affolter Schaffner's grasswort E AZ (HS)
LICA3 Lilium canadense L. Canada lily IN (R), NY (EV), RI (T), TN (T)
LICA4 Lilium catesbaei Walter pine lily FL (T)
LIGR2 Lilium grayi S. Watson Gray's lily NC (SC, T), TN (E)
LIIR Lilium iridollae Henry panhandle lily FL (E), NC (T)
LIMI Lilium michauxii Poir. Carolina lily FL (E)
LIMI9 Lilium michiganense Farw. Michigan lily NY (E), TN (T)
LIOC2 Lilium occidentale Purdy western lily E CA (E), OR (E)
LIPAP5 Lilium pardalinum Kellogg ssp. pitkinense (Beane & Vollmer) M.W. Skinner Pitkin Marsh lily E
LIPI Lilium pitkinense Beane & Vollmer CA (E)
LIPA2 Lilium parryi S. Watson lemon lily AZ (SR)
LIPH Lilium philadelphicum L. wood lily KY (T), MD (E, X), NM (E), NY (EV), OH (T), RI (SC), TN (E)
LIPHA Lilium philadelphicum L. var. andinum (Nutt.) Ker Gawl. wood lily NM (E)
LIUM2 Lilium umbellatum Pursh AZ (SR)
LISU Lilium superbum L. turk's-cap lily FL (E), KY (T), NH (E), NY (EV)
LIBA2 Limnanthes bakeri J.T. Howell Baker's meadowfoam CA (R)
LIDOS2 Limnanthes douglasii R. Br. ssp. sulphurea (C.T. Mason) C.T. Mason Douglas' meadowfoam CA (E)
LIFLC2 Limnanthes floccosa Howell ssp. californica Arroyo California meadowfoam E CA (E)
LIFLG Limnanthes floccosa Howell ssp. grandiflora Arroyo woolly meadowfoam E OR (E)
LIFLP2 Limnanthes floccosa Howell ssp. pumila (Howell) Arroyo woolly meadowfoam OR (T)
LIGRP2 Limnanthes gracilis Howell ssp. parishii (Jeps.) R.M. Beauch. Parish's slender meadowfoam CA (E)
LIVI3 Limnanthes vinculans Ornduff Sebastopol meadowfoam E CA (E)
LISP2 Limnobium spongia (Bosc) Rich. ex Steud. American spongeplant KY (T), MD (E)
LICA17 Limonium carolinianum (Walter) Britton lavender thrift NY (EV)
LIAU6 Limosella australis R. Br. Welsh mudwort ME (SC), MD (E), NH (E), NY (R), PA (X)
LISU2 Limosella subulata Ives CT (SC), NJ (E), RI (SC)
LIBE3 Lindera benzoin (L.) Blume northern spicebush ME (SC)
LIME7 Lindera melissifolia (Walter) Blume southern spicebush E AR (E), FL (E), GA (E), MO (E), NC (E)
LISU8 Lindera subcoriacea B.E. Wofford bog spicebush FL (E), NC (E)
LIDUA Lindernia dubia (L.) Pennell var. anagallidea (Michx.) Cooperr. yellowseed false pimpernel ME (PX)
LIAN2 Lindernia anagallidea (Michx.) Pennell NH (E)
LIMO3 Lindernia monticola Muhl. ex Nutt. piedmont false pimpernel
LISA3 Lindernia saxicola M.A. Curtis GA (E)
LIBO3 Linnaea borealis L. twinflower IN (X), IA (T), MD (E, X), NJ (E), OH (PRX), PA (T), RI (H), TN (PX, E)
LIBOA Linnaea borealis L. ssp. americana (Forbes) Hultén ex R.T. Clausen twinflower
LIBOA2 Linnaea borealis L. var. americana (Forbes) Rehder CT (SC)
LIAR5 Linum arenicola (Small) Winkl. sand flax FL (E)
LICA14 Linum carteri Small Carter's flax FL (E)
LIFL Linum floridanum (Planch.) Trel. Florida yellow flax MD (E, X)
LIIN Linum intercursum E.P. Bicknell sandplain flax CT (SC), IN (E), MD (T), MA (SC), NJ (E), NY (T), PA (E), RI (E)
LIMA10 Linum macrocarpum C.M. Rogers Spring Hill flax FL (E)
LIMEM Linum medium (Planch.) Britton var. medium stiff yellow flax NY (E)
LIMET Linum medium (Planch.) Britton var. texanum (Planch.) Fernald stiff yellow flax MA (T), NY (T), RI (SC)
LIST Linum striatum Walter ridged yellow flax IN (T), NY (R)
LISU4 Linum sulcatum Riddell grooved flax CT (SC), IN (R), MD (E), NJ (E), NY (T), PA (E), RI (H)
LIVI Linum virginianum L. woodland flax MI (T)
LIWE Linum westii C.M. Rogers West's flax FL (E)
LIEL2 Liparis elata Lindl. pantropical widelip orchid
LINE2 Liparis nervosa auct. non (Thunb.) Lindl. FL (E)
LILI3 Liparis liliifolia (L.) Rich. ex Ker Gawl. brown widelip orchid CT (E), MA (T), NY (E), RI (E), VT (T)
LILO Liparis loeselii (L.) Rich. yellow widelip orchid AR (T), KY (T), NH (T), NY (EV), RI (T), TN (E), WA (E)
LIAR6 Lipocarpha aristulata (Coville) G. Tucker awned halfchaff sedge WA (S)
LIDR3 Lipocarpha drummondii (Nees) G. Tucker Drummond's halfchaff sedge OH (E)
HEDR3 Hemicarpha drummondii Nees IN (X)
LIMI12 Lipocarpha micrantha (Vahl) G. Tucker smallflower halfchaff sedge ME (T), MD (E), MA (T), NY (E), OH (T), RI (T)
HEMI5 Hemicarpha micrantha (Vahl) Pax CT (E), NJ (E), PA (E)
LIFA2 Lipochaeta fauriei Levl. Olokele Canyon nehe E
LIKA Lipochaeta kamolensis O. Deg. & Sherff Maui nehe E
LILOL Lipochaeta lobata (Gaudich.) DC. var. leptophylla O. Deg. & Sherff shrubland nehe E
LIMI8 Lipochaeta micrantha (Nutt.) A. Gray Kauai nehe E
LITE7 Lipochaeta tenuifolia A. Gray Waianae Range nehe E
LIVE5 Lipochaeta venosa Sherff spreading nehe E
LIWA2 Lipochaeta waimeaensis H. St. John Waimea Canyon nehe E
LIST2 Liquidambar styraciflua L. sweetgum CT (SC)
LIAU2 Listera auriculata Wiegand auricled twayblade ME (T), MN (E), NH (E), NY (E), VT (E), WI (E)
LIAU3 Listera australis Lindl. southern twayblade FL (T), KY (E), NY (E), PA (E), TN (E), VT (E)
LIBO4 Listera borealis Morong northern twayblade WA (S)
LICO5 Listera convallarioides (Sw.) Nutt. ex Elliot broadlipped twayblade AZ (SR), NH (T), NY (E), WI (T)
LICO6 Listera cordata (L.) R. Br. heartleaf twayblade MD (E, X), MA (E), NH (T), NJ (E), NY (EV), OH (PRX), PA (E), RI (H)
LISM Listera smallii Wiegand kidneyleaf twayblade KY (T), MD (E), NJ (E), PA (E), TN (SC)
LIMA6 Lithophragma maximum Bacig. San Clemente Island woodland-star E CA (E)
LICA13 Lithospermum caroliniense (Walter ex J.F. Gmel.) MacMill. Carolina puccoon OH (T), PA (E)
LICAC9 Lithospermum caroliniense (Walter ex J.F. Gmel.) MacMill. var. croceum (Fernald) Cronquist Carolina puccoon
LICAC7 Lithospermum caroliniense (Walter ex J.F. Gmel.) MacMill. ssp. croceum (Fernald) Cusick NY (E)
LIIN2 Lithospermum incisum Lehm. narrowleaf stoneseed IN (E), MI (PREX)
LILA2 Lithospermum latifolium Michx. American stoneseed MD (E), PA (E)
LIAE Litsea aestivalis (L.) Fernald pondspice FL (E), GA (T), MD (E)
LIUN Littorella uniflora (L.) Asch. American shoreweed ME (SC), NY (E)
LOSC60 Lobaria scrobiculata (Scop.) DC. lung lichen MN (E)
LOAM4 Lobelia amoena Michx. southern lobelia TN (T)
LOAPG Lobelia appendiculata A. DC. var. gattingeri (A. Gray) McVaugh Gattinger's lobelia KY (E)
LOBO Lobelia boykinii Torr. & A. Gray ex A. DC. Boykin's lobelia FL (E), NJ (E)
LOCA Lobelia canbyi A. Gray Canby's lobelia MD (E), TN (T)
LOCA2 Lobelia cardinalis L. cardinalflower FL (T), NY (EV)
LOCAG2 Lobelia cardinalis L. ssp. graminea (Lam.) McVaugh AZ (SR)
LODO Lobelia dortmanna L. Dortmann's cardinalflower NJ (E), NY (EV), PA (T), RI (SC), WA (T)
LOFE Lobelia fenestralis Cav. fringeleaf lobelia AZ (SR)
LOGAK3 Lobelia gaudichaudii A. DC. ssp. koolauensis (Hosaka & Fosberg) Lammers Koolau Range lobelia E
LOGL Lobelia glandulosa Walter glade lobelia MD (E, X)
LOKA Lobelia kalmii L. Ontario lobelia NH (T), PA (E), WA (E)
LOLAA Lobelia laxiflora Kunth var. angustifolia A. DC. Sierra Madre lobelia AZ (SR)
LOMO3 Lobelia monostachya (Rock) Lammers Waianae Range lobelia E
LONI Lobelia niihauensis H. St. John Niihau lobelia E
LONU Lobelia nuttallii Schult. Nuttall's lobelia KY (T), NY (R), PA (X)
LOOA Lobelia oahuensis Rock Oahu lobelia E
LOPU Lobelia puberula Michx. downy lobelia PA (E)
LOSI Lobelia siphilitica L. great blue lobelia ME (PX), MA (E), NY (EV)
LOSQ Loeflingia squarrosa Nutt. spreading pygmyleaf WA (T)
LOPR Loiseleuria procumbens (L.) Desv. alpine azalea ME (T), NH (T), NY (E), WA (S)
LOKU Lomariopsis kunzeana (C. Presl ex Underw.) Holttum hollyleaf fringedfern FL (E)
LOBR Lomatium bradshawii (Rose ex Mathias) Mathias & Constance Bradshaw's desertparsley E OR (E), WA (E)
LOCO8 Lomatium cookii J.S. Kagan agate desertparsley E OR (E)
LOCU Lomatium cusickii (S. Watson) J.M. Coult. & Rose Cusick's biscuitroot WA (PX)
LOER2 Lomatium erythrocarpum R.J. Meinke & Constance redfruit desertparsley OR (E)
LOFO Lomatium foeniculaceum (Nutt.) J.M. Coult. & Rose desert biscuitroot IA (E)
LOGR2 Lomatium greenmanii Mathias Greenman's biscuitroot OR (T)
LOLA3 Lomatium laevigatum (Nutt.) J.M. Coult. & Rose Slickrock biscuitroot WA (S)
LOOR Lomatium orientale J.M. Coult. & Rose Northern Idaho biscuitroot IA (T)
LORO2 Lomatium rollinsii Mathias & Constance Rollins' biscuitroot WA (T)
LOSE2 Lomatium serpentinum (M.E. Jones) Mathias sweetscented biscuitroot WA (S)
LOSU4 Lomatium suksdorfii (S. Watson) J.M. Coult. & Rose Suksdorf's desertparsley WA (S)
LOTU Lomatium tuberosum Hoover Hoover's desertparsley WA (T)
LORO Lomatogonium rotatum (L.) Fr. ex Fernald marsh felwort ME (T)
LOCA6 Lonicera caerulea L. sweetberry honeysuckle RI (SC)
LOCA7 Lonicera canadensis Bartram ex Marsh. American fly honeysuckle IN (X), MD (E), NJ (E), TN (SC)
LODI2 Lonicera dioica L. limber honeysuckle ME (E), RI (SC), TN (SC)
LODIG Lonicera dioica L. var. glaucescens (Rydb.) Butters IL (E)
LODIO Lonicera dioica L. var. orientalis Gleason KY (E)
LOFL Lonicera flava Sims yellow honeysuckle IL (E), OH (PRX), TN (SC)
LOHI Lonicera hirsuta Eaton hairy honeysuckle MA (E), PA (E)
LOIN5 Lonicera involucrata (Richardson) Banks ex Spreng. twinberry honeysuckle MI (T), WI (E)
LOOB Lonicera oblongifolia (Goldie) Hook. swamp fly honeysuckle ME (SC), OH (PRX), PA (E)
LORE5 Lonicera reticulata Raf. grape honeysuckle KY (E)
LOPR2 Lonicera prolifera (G. Kirchn.) J.R. Booth ex Rehder TN (PX, E)
LOSE Lonicera sempervirens L. trumpet honeysuckle ME (E)
LOVI Lonicera villosa (Michx.) Schult. mountain fly honeysuckle OH (PRX), PA (E)
LOAU Lophiola aurea Ker Gawl. goldencrest NC (E)
LOAP3 Lophocolea appalachiana R.M. Schust. TN (SC)
LOARA5 Lotus argophyllus (A. Gray) Greene var. adsurgens Dunkle Santa Cruz Island silverhosackia
LOARA Lotus argophyllus (A. Gray) Greene ssp. adsurgens (Dunkle) P.H. Raven CA (E)
LOARN3 Lotus argophyllus (A. Gray) Greene var. niveus (Greene) Ottley Santa Cruz Island silverhosackia CA (E)
LODET Lotus dendroideus (Greene) Greene var. traskiae (Eastw. ex Noddin) Isely Trask's island broom E CA (E)
LUDE4 Ludwigia decurrens Walter wingleaf primrose-willow IN (R), PA (E)
LUGL Ludwigia glandulosa Walter cylindricfruit primrose-willow IN (T), MD (E)
LUHI Ludwigia hirtella Raf. spindleroot KY (E), MD (E)
LUPO Ludwigia polycarpa Short & Peter manyfruit primrose-willow CT (SC), MA (E), PA (E), VT (E)
LUSP Ludwigia sphaerocarpa Elliot globefruit primrose-willow CT (E), IN (E), MA (E), MI (T), NY (T), PA (X), RI (E), TN (T)
LUCID Lupinus citrinus Kellogg var. deflexus (Congd.) Jeps. orangeflower lupine CA (T)
LULU2 Lupinus luteolus Kellogg pale yellow lupine
LUMI11 Lupinus milo-bakeri C.P. Sm. CA (T)
LUNI2 Lupinus nipomensis Eastw. Nipomo Mesa lupine E CA (E)
LUORK Lupinus oreganus A. Heller var. kincaidii C.P. Sm. Kincaid's lupine T
LUSUK Lupinus sulphureus Douglas ex Hook. ssp. kincaidii (C.P. Sm.) L. Phillips OR (T)
LUSUK2 Lupinus sulphureus Douglas ex Hook. var. kincaidii (C.P. Sm.) C.L. Hitchc. WA (E)
LUPA6 Lupinus padre-crowleyi C.P. Sm. Dedecker lupine CA (R)
LUPE3 Lupinus perennis L. sundial lupine IA (T), ME (PX), MD (T), NH (T), PA (R), RI (SC), VT (E)
LUSA3 Lupinus sabinianus Douglas ex Lindl. Sabin's lupine
LUSA4 Lupinus sabinei Douglas ex Hook. WA (E)
LUTI Lupinus tidestromii Greene Tidestrom's lupine E CA (E)
LUWE Lupinus westianus Small Gulf Coast lupine FL (T)
LUWEA Lupinus westianus Small var. aridorum (McFarlin ex Beckner) Isely Gulf Coast lupine
LUAR11 Lupinus aridorum McFarlin ex Beckner E FL (E)
LUAC Luzula acuminata Raf. hairy woodrush IL (E), IN (E), NJ (E)
LUAR5 Luzula arcuata (Wahlenb.) Sw. curved woodrush WA (S)
LUBU Luzula bulbosa (Alph. Wood) Smyth & Smyth bulbous woodrush OH (T), PA (E)
LUCO5 Luzula confusa Lindeberg northern woodrush ME (T), NH (E)
LUPA4 Luzula parviflora (Ehrh.) Desv. smallflowered woodrush MI (T)
LUPAM3 Luzula parviflora (Ehrh.) Desv. ssp. melanocarpa (Michx.) Tolm. MA (E)
LUSP4 Luzula spicata (L.) DC. spiked woodrush ME (T), NH (T), NY (E)
LYAL5 Lycopodiella alopecuroides (L.) Cranfill foxtail clubmoss MA (E), NY (EV), PA (E), RI (E), TN (T)
LYAL2 Lycopodium alopecuroides L. CT (SC)
LYAP4 Lycopodiella appressa (Chapm.) Cranfill southern bog clubmoss KY (E), ME (PX), NY (EV), PA (T)
LYCA5 Lycopodiella caroliniana (L.) Pic. Serm. slender clubmoss MD (E, X), NY (E)
LYCEC Lycopodiella cernua (L.) Pic. Serm. var. cernua staghorn clubmoss
LYCE Lycopodium cernuum L. FL (CE)
LYIN2 Lycopodiella inundata (L.) Holub inundated clubmoss IN (E), KY (E), NY (EV), WA (S)
LYIN Lycopodium inundatum L. IL (E), IA (E)
LYMA7 Lycopodiella margueritiae J.G. Bruce, W.H. Wagner & Beitel Marguerite's clubmoss MI (T), OH (E)
LYSU2 Lycopodiella subappressa J.G. Bruce, W.H. Wagner & Beitel northern bog clubmoss IN (E), OH (E)
LYAN2 Lycopodium annotinum L. stiff clubmoss NJ (E), NY (EV), RI (E), TN (PX, E)
LYCL Lycopodium clavatum L. running clubmoss IL (E), IA (E), KY (E), NY (EV)
LYCO3 Lycopodium complanatum L. groundcedar NY (E)
LYDE Lycopodium dendroideum Michx. tree groundpine IL (E), IN (E), IA (T), NY (EV), TN (SC), WA (S)
LYDI3 Lycopodium digitatum Dill. ex A. Braun fan clubmoss NY (EV)
LYHI2 Lycopodium hickeyi W.H. Wagner, Beitel & Moran Pennsylvania clubmoss IN (R)
LYOB Lycopodium obscurum L. rare clubmoss IN (R), NY (EV)
LYSA Lycopodium sabinifolium Willd. savinleaf groundpine
DISA11 Diphasiastrum sabinifolium (Willd.) Holub ME (E), PA (X)
LYSI Lycopodium sitchense Rupr. Sitka clubmoss NY (E)
DISI6 Diphasiastrum sitchense (Rupr.) Holub ME (T), VT (T)
LYTR Lycopodium tristachyum Pursh deeproot clubmoss IN (T), NY (EV)
LYAM2 Lycopus amplectens Raf. clasping water horehound CT (SC), IN (E), MD (E)
LYRU Lycopus rubellus Moench taperleaf water horehound MA (E), NY (E), PA (E), RI (SC)
LYVI4 Lycopus virginicus L. Virginia water horehound MI (T)
LYPA3 Lygodium palmatum (Bernh.) Sw. American climbing fern CT (SC), IN (E), MD (T), MA (SC), MI (E), NY (E), PA (R), RI (SC), VT (E)
LYLI Lyonia ligustrina (L.) DC. maleberry OH (PRX)
LYMA2 Lyonia mariana (L.) D. Don piedmont staggerbush CT (SC), PA (E), RI (H)
LYTRP Lyonia truncata Urb. var. proctorii W.S. Judd Proctor's staggerbush E PR (E)
LYWA Lysiloma watsonii Rose littleleaf false tamarind
LYMIT Lysiloma microphyllum Benth. var. thornberi (Britton & Rose) Isely AZ (SR)
LYAS2 Lysimachia asperulifolia Poir. roughleaf yellow loosestrife E NC (E)
LYFI2 Lysimachia filifolia Forbes Wailua River yellow loosestrife E
LYFR2 Lysimachia fraseri Duby Fraser's yellow loosestrife GA (R), IL (E), KY (E), NC (E), TN (E)
LYHY Lysimachia hybrida Michx. lowland yellow loosestrife MD (T), NY (E), PA (T)
LYLY Lysimachia lydgatei Hillebr. Maui yellow loosestrife E
LYMA5 Lysimachia maxima (R. Knuth) H. St. John Pelekunu Trail yellow loosestrife E
LYQU Lysimachia quadriflora Sims fourflower yellow loosestrife NY (E), TN (SC)
LYRA3 Lysimachia radicans Hook. trailing yellow loosestrife IL (E), KY (H)
LYTE2 Lysimachia terrestris (L.) Britton, Sterns & Poggenb. earth loosestrife KY (E), TN (E)
LYTH2 Lysimachia thyrsiflora L. tufted loosestrife NH (T)
LYAL4 Lythrum alatum Pursh winged lythrum CT (SC), MD (E), PA (E)
LYCU2 Lythrum curtissii Fernald Curtiss' loosestrife FL (E), GA (T)
LYFL4 Lythrum flagellare Shuttlw. ex Chapm. Florida loosestrife FL (E)
LYLI2 Lythrum lineare L. wand lythrum NY (E)
MAAL7 Macbridea alba Chapm. white birds-in-a-nest T FL (E)
MACA Macbridea caroliniana (Walter) S.F. Blake Carolina birds-in-a-nest NC (T)
MAASL Machaeranthera asteroides (Torr.) Greene var. lagunensis (D.D. Keck) B.L. Turner CA (R)
MALU Macradenia lutescens R. Br. longgland orchid FL (E)
MAFL4 Macranthera flammea (Bartram) Pennell flameflower FL (E)
MASU18 Macroptilium supinum (Wiggins & Rollins) A. Delgado supine bean
PHSU11 Phaseolus supinus Wiggins & Rollins AZ (SR)
MAAC Magnolia acuminata (L.) L. cucumber-tree FL (E), IN (E)
MAAS Magnolia ashei Weath. Ashe's magnolia FL (E)
MAMA2 Magnolia macrophylla Michx. bigleaf magnolia AR (E), OH (E)
MAPY Magnolia pyramidata Bartram pyramid magnolia FL (E)
MATR Magnolia tripetala (L.) L. umbrella-tree FL (E), IN (E), PA (R)
MAVI2 Magnolia virginiana L. sweetbay MA (E), NY (E), PA (T), TN (T)
MANE3 Mahonia nevinii (A. Gray) Fedde Nevin's barberry CA (E)
BENE Berberis nevinii A. Gray E
MAPII Mahonia pinnata (Lag.) Fedde ssp. insularis (Munz) J.B. Roof island barberry CA (E)
BEPII Berberis pinnata Lag. ssp. insularis Munz E
MARE11 Mahonia repens (Lindl.) G. Don creeping barberry
MASO5 Mahonia sonnei Abrams CA (E)
MACA4 Maianthemum canadense Desf. Canada mayflower KY (T)
MACAI Maianthemum canadense Desf. var. interius Fernald NJ (E)
MARAA Maianthemum racemosum (L.) Link ssp. amplexicaule (Nutt.) LaFrankie feathery false lily of the valley AZ (SR)
MARAR Maianthemum racemosum (L.) Link ssp. racemosum feathery false lily of the valley AZ (SR)
MAST4 Maianthemum stellatum (L.) Link starry false lily of the valley AZ (SR), KY (E)
SMST Smilacina stellata (L.) Desf. MD (E), TN (E)
MATR4 Maianthemum trifolium (L.) Sloboda threeleaf false lily of the valley
SMTR Smilacina trifolia (L.) Desf. CT (E), NJ (E), OH (PRX), RI (T)
MACL Malacothamnus clementinus (Munz & I.M. Johnst.) Kearney San Clemente Island bushmallow E CA (E)
MAFA Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene Mendocino bushmallow
MAFAN Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene var. nesioticus (B.L. Rob.) Kearney E CA (E)
MAIN2 Malacothrix indecora Greene Santa Cruz Island desertdandelion E
MASQ Malacothrix squalida Greene Santa Cruz desertdandelion E
MABA6 Malaxis bayardii Fernald Bayard's adder's-mouth orchid MA (E), NJ (E), NY (E), PA (R)
MABR5 Malaxis brachypoda (A. Gray) Fernald white adder's-mouth orchid CT (E), PA (E), VT (T)
MAMOB2 Malaxis monophyllos (L.) Sw. ssp. brachypoda (A. Gray) Á. Löve & D. Löve ME (E), NY (EV)
MAMOB Malaxis monophyllos (L.) Sw. var. brachypoda (A. Gray) F. Morris & Eames MA (E), NH (E), NJ (E)
MACO4 Malaxis corymbosa (S. Watson) Kuntze Huachuca Mountain adder's-mouth orchid AZ (SR)
MAEH Malaxis ehrenbergii (Rchb. f.) Kuntze [excluded] Ehrenberg's adder's-mouth orchid AZ (SR)
MAPA4 Malaxis paludosa (L.) Sw. bog adder's-mouth orchid MN (E)
MASO8 Malaxis soulei L.O. Williams Chiricahua adder's-mouth orchid
MAMA13 Malaxis macrostachya auct. non (Lex.) Kuntze AZ (SR)
MATE2 Malaxis tenuis (S. Watson) Ames Arizona adder's-mouth orchid AZ (SR)
MAUN Malaxis unifolia Michx. green adder's-mouth orchid CT (E), FL (E), IN (E), NH (T), NY (EV), RI (E)
MAAN3 Malus angustifolia (Aiton) Michx. southern crab apple FL (T), IL (E), KY (SC)
MAANA Malus angustifolia (Aiton) Michx. var. angustifolia southern crab apple
PYAN2 Pyrus angustifolia Aiton OH (PRX)
MACO5 Malus coronaria (L.) Mill. sweet crab apple
MAGL11 Malus glaucescens Rehder NY (E)
MAHI Malvastrum hispidum (Pursh) Hochr. hispid false mallow KY (T)
MABA9 Mammillaria barbata Engelm. greenflower nipple cactus
MAVI6 Mammillaria viridiflora (Britton & Rose) Boed. AZ (SR)
MAGR9 Mammillaria grahamii Engelm. Graham's nipple cactus
MAGRG4 Mammillaria grahamii Engelm. var. grahamii AZ (SR)
MAGRO Mammillaria grahamii Engelm. var. oliviae (Orcutt) L.D. Benson AZ (SR)
MAMI2 Mammillaria microcarpa Engelm. AZ (SR)
MAHEH2 Mammillaria heyderi Muehlenpf. var. heyderi little nipple cactus
MAGUA Mammillaria gummifera Engelm. var. applanata (Engelm.) L.D. Benson AZ (SR)
MAHEM Mammillaria heyderi Muehlenpf. var. macdougalii (Rose) L.D. Benson Macdougal's nipple cactus
MAGU Mammillaria gummifera Engelm. p.p. AZ (SR)
MAGUM Mammillaria gummifera Engelm. var. macdougalii (Rose) L.D. Benson AZ (SR)
MAHEM2 Mammillaria heyderi Muehlenpf. var. meiacantha (Engelm.) L.D. Benson little nipple cactus AZ (SR)
MALA2 Mammillaria lasiacantha Engelm. lacespine nipple cactus AZ (SR)
MAMA6 Mammillaria mainiae K. Brandegee counterclockwise nipple cactus AZ (SR)
MATE4 Mammillaria tetrancistra Engelm. common fishhook cactus AZ (SR), NV (CY)
MATH Mammillaria thornberi Orcutt Thornber's nipple cactus AZ (SR)
MAWRW Mammillaria wrightii Engelm. var. wilcoxii (Toumey ex K. Schum.) W.T. Marsh. Wilcox's nipple cactus AZ (SR), NM (E)
MAWRW2 Mammillaria wrightii Engelm. var. wrightii Wright's nipple cactus AZ (SR)
MAVI5 Manfreda virginica (L.) Salisb. ex Rose false aloe
AGVI6 Agave virginica L. OH (T)
MAWA Manihot walkerae Croizat Walker's manihot E TX (E)
MAJA2 Manilkara jaimiqui (C. Wright) Dubard wild dilly FL (T)
MAGR7 Marshallia grandiflora Beadle & F.E. Boynt. Monongahela Barbara's buttons KY (E), MD (E, X), PA (E), TN (E)
MAMO3 Marshallia mohrii Beadle & F.E. Boynt. Mohr's Barbara's buttons T GA (T)
MAOB Marshallia obovata (Walter) Beadle & F.E. Boynt. spoonshape Barbara's buttons FL (E), TN (T)
MARA6 Marshallia ramosa Beadle & F.E. Boynt. southern Barbara's buttons FL (E), GA (R)
MATR2 Marshallia trinervia (Walter) Trel. broadleaf Barbara's buttons TN (T)
MAVE2 Marsilea vestita Hook. & Grev. hairy waterclover IA (T), MN (E)
MAVI4 Marsilea villosa Kaulf. villous waterclover E
MAFU4 Marsupella funckii (F. Weber & D. Mohr) Dumort. TN (E)
MAAL6 Matelea alabamensis (Vail) Woodson Alabama milkvine FL (E), GA (T)
MABA3 Matelea baldwyniana (Sweet) Woodson Baldwin's milkvine FL (E)
MACA9 Matelea carolinensis (Jacq.) Woodson maroon Carolina milkvine KY (E), MD (E)
MACY3 Matelea cynanchoides (Engelm.) Woodson prairie milkvine AR (E)
MADE3 Matelea decipiens (Alexander) Woodson oldfield milkvine IL (E), MD (E, X)
MAFL3 Matelea flavidula (Chapm.) Woodson yellow Carolina milkvine FL (E)
MAFL5 Matelea floridana (Vail) Woodson Florida milkvine FL (E)
MAGO Matelea gonocarpos (Walter) Shinners angularfruit milkvine FL (T)
MAOB2 Matelea obliqua (Jacq.) Woodson climbing milkvine IL (T), MD (E), OH (T), PA (E)
GOOB Gonolobus obliquus (Jacq.) R. Br. ex Schult. IN (R)
MAPU3 Matelea pubiflora (Decne.) Woodson trailing milkvine FL (E), GA (R)
MAST Matteuccia struthiopteris (L.) Todaro ostrich fern IN (R), NY (EV)
MASTP Matteuccia struthiopteris (L.) Todaro var. pensylvanica (Willd.) Morton RI (SC)
MACR2 Maxillaria crassifolia (Lindl.) Rchb. f. hidden orchid FL (E)
MAPA22 Maxillaria parviflora (Poepp. & Endl.) Garay purple tiger orchid FL (E)
MAPH Maytenus phyllanthoides Benth. Florida mayten FL (T)
MEAC Mecardonia acuminata (Walter) Small axilflower MD (E)
MEOR Meconella oregana Nutt. white fairypoppy WA (T)
MEVI Medeola virginiana L. Indian cucumber FL (E), IL (E)
MECO Meehania cordata (Nutt.) Britton Meehan's mint PA (E), TN (T)
MEAE2 Megaceros aenigmaticus R.M. Schust. TN (SC)
MELI2 Melampyrum lineare Desr. narrowleaf cowwheat IN (R), OH (T)
MELIL2 Melampyrum lineare Desr. var. latifolium Bart. narrowleaf cowwheat KY (T)
MELIP2 Melampyrum lineare Desr. var. pectinatum (Pennell) Fernald narrowleaf cowwheat KY (E)
MENI3 Melanthera nivea (L.) Small snow squarestem IL (E), KY (SC)
MEPA3 Melanthera parvifolia Small small-leaf squarestem FL (T)
MEMU Melica mutica Walter twoflower melicgrass IL (E), MD (T)
MENI Melica nitens (Scribn.) Nutt. ex Piper threeflower melicgrass IN (T), MD (T), MN (T), OH (E), PA (T)
MESM Melica smithii (Porter ex A. Gray) Vasey Smith's melicgrass WI (E)
MEAD Melicope adscendens (H. St. John & Hume) T.G. Hartley & B.C. Stone auwahi melicope E
MEBA2 Melicope balloui (Rock) T.G. Hartley & B.C. Stone Ballou's melicope E
MEHA3 Melicope haupuensis (H. St. John) T.G. Hartley & B.C. Stone Haupa Mountain melicope E
MEKN Melicope knudsenii (Hillebr.) T.G. Hartley & B.C. Stone Olokele Valley melicope E
MELY Melicope lydgatei (Hillebr.) T.G. Hartley & B.C. Stone Koolau Range melicope E
MEMU4 Melicope mucronulata (H. St. John) T.G. Hartley & B.C. Stone alani E
MEMU5 Melicope munroi (H. St. John) T.G. Hartley & B.C. Stone lanahale E
MEOV Melicope ovalis (H. St. John) T.G. Hartley & B.C. Stone Hana melicope E
MEPA6 Melicope pallida (Hillebr.) T.G. Hartley & B.C. Stone pale melicope E
MEQU3 Melicope quadrangularis (H. St. John & Hume) T.G. Hartley & B.C. Stone fourangle melicope E
MERE3 Melicope reflexa (H. St. John) T.G. Hartley & B.C. Stone lava melicope E
MESA4 Melicope saint-johnii (Hume) T.G. Hartley & B.C. Stone St. John's melicope E
MEZA Melicope zahlbruckneri (Rock) T.G. Hartley & B.C. Stone kipuka piaula E
MEPE3 Melothria pendula L. Guadeloupe cucumber IL (T), IN (X), MD (E)
MELE3 Mentzelia leucophylla Brandegee Ash Meadows blazingstar T NV (FP)
MEMO2 Mentzelia mollis M. Peck soft blazingstar OR (E)
MEPA5 Mentzelia packardiae Glad. Packard's blazingstar OR (T)
METR3 Menyanthes trifoliata L. buckbean IA (T), MD (E), NC (T), OH (T)
MEPI2 Menziesia pilosa (Michx. ex Lam.) Juss. ex Pers. minniebush PA (R), TN (SC)
MEMA3 Mertensia maritima (L.) Gray oysterleaf MA (E), NH (E)
MEPA Mertensia paniculata (Aiton) G. Don tall bluebells IA (E)
MEVI3 Mertensia virginica (L.) Pers. ex Link Virginia bluebells MI (T), NY (EV)
MELU3 Mesadenus lucayanus (Britton) Schltr. Florida Keys ladies'-tresses
SPPO3 Spiranthes polyantha auct. non Rchb. f. FL (E)
MEUN3 Metzgeria uncigera A. Evans TN (SC)
MIMI6 Micranthemum micranthemoides (Nutt.) Wettst. Nuttall's mudflower MD (E, X), NJ (E), PA (X)
MIHE2 Microgramma heterophylla (L.) Wherry clinging snakefern FL (E)
MIBI Microseris bigelovii (A. Gray) Sch. Bip. coastal silverpuffs WA (PX)
MIBO Microseris borealis (Bong.) Sch. Bip. northern microseris WA (S)
MIHO2 Microseris howellii A. Gray Howell's silverpuffs OR (T)
MIMIE Mielichhoferia mielichhoferiana (Funck) Loeske var. elongata (Hoppe & Hornsch. ex Hook.) Wijk & Margad. Mielichhofer's copper moss
MIEL5 Mielichhoferia elongata (Hoppe & Hornsch. ex Hook.) Nees & Hornsch TN (SC)
MISC Mikania scandens (L.) Willd. climbing hempvine IN (E), ME (PX), MI (PREX), NH (T)
MIEF Milium effusum L. American milletgrass CT (SC), IL (E), IN (R), MA (T), NJ (E), TN (SC)
MIBI2 Milla biflora Cav. Mexican star AZ (SR)
MIAL2 Mimulus alatus Aiton sharpwing monkeyflower CT (SC), IA (T), MA (E), MI (PREX), NY (R)
MIGL Mimulus glabratus Kunth roundleaf monkeyflower IL (E), IA (T)
MIGLM Mimulus glabratus Kunth var. michiganensis (Pennell) Fassett Michigan monkeyflower E MI (E)
MIJU Mimulus jungermannioides Suksd. liverwort monkeyflower WA (PX)
MIMO3 Mimulus moschatus Douglas ex Lindl. muskflower MA (E), NH (E)
MIPU2 Mimulus pulsiferae A. Gray candelabrum monkeyflower WA (S)
MIRIC Mimulus ringens L. var. colpophilus Fernald Allegheny monkeyflower ME (SC)
MISU2 Mimulus suksdorfii A. Gray Suksdorf's monkeyflower WA (S)
MICA8 Minuartia caroliniana (Walter) Mattf. pine barren stitchwort NY (R)
ARCA31 Arenaria caroliniana Walter RI (H)
MICU3 Minuartia cumberlandensis (B.E. Wofford & Kral) McNeill Cumberland stitchwort KY (E)
ARCU5 Arenaria cumberlandensis B.E. Wofford & Kral E TN (E)
MIGL5 Minuartia glabra (Michx.) Mattf. Appalachian stitchwort KY (T), ME (SC), MD (E), NH (T), NY (T), PA (T)
ARGL14 Arenaria glabra Michx. CT (T)
ARGRG Arenaria groenlandica (Retz.) Spreng. var. glabra (Michx.) Fernald RI (T)
MIGO Minuartia godfreyi (Shinners) McNeill Godfrey's stitchwort FL (E), NC (E)
ARGO2 Arenaria godfreyi Shinners TN (E)
MIGR7 Minuartia groenlandica (Retz.) Ostenf. Greenland stitchwort ME (SC)
ARGR9 Arenaria groenlandica (Retz.) Spreng. TN (E)
MIMA5 Minuartia marcescens (Fernald) House serpentine stitchwort VT (T)
MIMI2 Minuartia michauxii (Fenzl) Farw. Michaux's stitchwort MD (T), MA (T)
MIMIM Minuartia michauxii (Fenzl) Farw. var. michauxii Michaux's stitchwort
ARST8 Arenaria stricta Michx. IN (R), NJ (E), RI (E)
MINUF Minuartia nuttallii (Pax) Briq. ssp. fragilis (Maguire & A.H. Holmgren) McNeill brittle sandwort WA (S)
MIPA6 Minuartia patula (Michx.) Mattf. pitcher's stitchwort
ARPA27 Arenaria patula Michx. IL (T), IN (E), OH (E)
MIRU3 Minuartia rubella (Wahlenb.) Hiern. beautiful sandwort ME (T), VT (T)
MIST5 Minuartia stricta (Sw.) Hiern. bog stitchwort NH (E)
MIUN Minuartia uniflora (Walter) Mattf. oneflower stitchwort NC (E)
MIAL4 Mirabilis albida (Walter) Heimerl white four o'clock KY (E), TN (T)
MIHI Mirabilis hirsuta (Pursh) MacMill. hairy four o'clock IL (E)
MIMA2 Mirabilis macfarlanei Constance & Rollins MacFarlane's four o'clock T OR (E)
MIRE Mitchella repens L. partridgeberry IA (T)
MINU3 Mitella nuda L. naked miterwort CT (SC), PA (E)
MIMA6 Mitracarpus maxwelliae Britton & P. Wilson Maxwell's girdlepod E PR (E)
MIPO2 Mitracarpus polycladus Urb. cana gorda girdlepod E PR (E)
MOLA6 Moehringia lateriflora (L.) Fenzl bluntleaf sandwort MD (E)
MOMA3 Moehringia macrophylla (Hook.) Fenzl largeleaf sandwort MA (E), MN (T), WI (E)
ARMA18 Arenaria macrophylla Hook. CT (E), MI (T)
MOBR2 Monarda bradburiana Beck eastern beebalm IN (E)
MOCL Monarda clinopodia L. white bergamot NJ (E), NY (E)
MODI Monarda didyma L. scarlet beebalm MI (PREX), NY (EV)
MOFI Monarda fistulosa L. wild bergamot RI (H)
MOPU Monarda punctata L. spotted beebalm KY (H), OH (E), PA (E)
MOLIV Monardella linoides A. Gray ssp. viminea (Greene) Abrams willowy monardella E CA (E)
MOUN2 Moneses uniflora (L.) A. Gray single delight CT (E), OH (E), RI (T)
MOCO7 Monolopia congdonii (A. Gray) B.G. Baldw. San Joaquin woollythread E
MOHY3 Monotropa hypopithys L. pinesap FL (E), IA (T)
MOOD2 Monotropsis odorata Schwein. ex Elliot pygmypipes KY (T), MD (E), TN (T)
MORE Monotropsis reynoldsiae (A. Gray) A. Heller FL (E)
MOCH Montia chamissoi (Ledeb. ex Spreng.) Greene water minerslettuce MN (E), PA (E)
MODI3 Montia diffusa (Nutt.) Greene spreading minerslettuce WA (S)
MOFO Montia fontana L. annual water minerslettuce ME (SC)
MOCA7 Morella caroliniensis (Mill.) Small southern bayberry
MYHE Myrica heterophylla Raf. MD (E)
MOPE6 Morella pensylvanica (Mirb.) Kartesz northern bayberry
MYPE7 Myrica pensylvanica Mirb. NY (EV), OH (E)
MORU2 Morus rubra L. red mulberry CT (E), MA (E), MI (T), VT (T)
MUBU Muhlenbergia bushii Pohl nodding muhly KY (E)
MUCA2 Muhlenbergia capillaris (Lam.) Trin. hairawn muhly CT (E), IN (E), MD (E), NJ (E), OH (PRX), PA (X)
MUCU3 Muhlenbergia cuspidata (Torr. ex Hook.) Rydb. plains muhly IN (E), KY (T), MI (PREX), OH (E), TN (E)
MUGL Muhlenbergia glabriflora Scribn. inland muhly KY (SC), TN (SC)
MUGL3 Muhlenbergia glomerata (Willd.) Trin. spiked muhly WA (S)
MURI Muhlenbergia richardsonis (Trin.) Rydb. mat muhly ME (T), MI (T)
MUSO Muhlenbergia sobolifera (Muhl. ex Willd.) Trin. rock muhly ME (PX), NH (T)
MUTO Muhlenbergia torreyana (Schult.) Hitchc. New Jersey muhly MD (E), NC (E), TN (E)
MUUN Muhlenbergia uniflora (Muhl.) Fernald bog muhly PA (E)
MURA3 Munroidendron racemosum (Forbes) Sherff false 'ohe E
MYLA Myosotis laxa Lehm. bay forget-me-not IN (E)
MYPA Myrcia paganii Krug & Urb. ausu E PR (E)
MYFR Myrcianthes fragrans (Sw.) McVaugh twinberry FL (T)
MYGA Myrica gale L. sweetgale NC (E), PA (T)
MYAL3 Myriophyllum alterniflorum DC. alternateflower watermilfoil CT (E), MA (E), NY (T), RI (H)
MYFA2 Myriophyllum farwellii Morong Farwell's watermilfoil MA (E), MI (T), NH (T), NY (T), PA (E)
MYHE2 Myriophyllum heterophyllum Michx. twoleaf watermilfoil KY (SC), OH (E), PA (E)
MYLA2 Myriophyllum laxum Shuttlw. ex Chapm. loose watermilfoil GA (T), NC (T)
MYPI Myriophyllum pinnatum (Walter) Britton, Sterns & Poggenb. cutleaf watermilfoil CT (SC), IN (E), KY (H), MA (SC), NJ (E), NY (E), RI (T), TN (T)
MYSI Myriophyllum sibiricum Kom. shortspike watermilfoil NJ (E), OH (T)
MYEX Myriophyllum exalbescens Fernald PA (E)
MYTE Myriophyllum tenellum Bigelow slender watermilfoil CT (SC), MD (E, X), NJ (E), PA (T)
MYVE3 Myriophyllum verticillatum L. whorl-leaf watermilfoil IN (T), MA (E), NJ (E), OH (E), PA (E)
MYJU Myrsine juddii Hosaka cloudswept colicwood E
MYLI Myrsine linearifolia Hosaka narrowleaf colicwood T
NAFI2 Najas filifolia Haynes needleleaf waternymph FL (T)
NAGR Najas gracillima (A. Braun ex Engelm.) Magnus slender waternymph IN (E), KY (SC), ME (SC), MD (E, X), OH (E), PA (T)
NAGU Najas guadalupensis (Spreng.) Magnus southern waternymph CT (SC), ME (PX)
NAGUM2 Najas guadalupensis (Spreng.) Magnus ssp. muenscheri (R.T. Clausen) Haynes & C.B. Hellquist Muenscher's waternymph
NAGUM Najas guadalupensis (Spreng.) Magnus var. muenscheri (R.T. Clausen) Haynes NY (E)
NAGUO2 Najas guadalupensis (Spreng.) Magnus ssp. olivacea (Rosend. & Butters) Haynes & C.B. Hellquist Guadalupe waternymph
NAGUO Najas guadalupensis (Spreng.) Magnus var. olivacea (Rosend. & Butters) Haynes NY (E)
NAMA Najas marina L. spiny naiad NY (E), PA (E)
NADI2 Napaea dioica L. glademallow IN (R), MN (T)
NAAM Narthecium americanum Ker Gawl. yellow asphodel NJ (E), NC (E)
NAGA Nasturtium gambelii (S. Watson) O.E. Schulz Gambel's yellowcress
ROGA2 Rorippa gambelii (S. Watson) Rollins & Al-Shehbaz E CA (T)
NAFO Navarretia fossalis Moran vernalpool pincushionplant T
NALEP Navarretia leucocephala Benth. ssp. pauciflora (H. Mason) Day fewflower navarretia CA (T)
NAPA2 Navarretia pauciflora H. Mason E
NALEP2 Navarretia leucocephala Benth. ssp. plieantha (H. Mason) Day manyflowered navarretia E CA (E)
NATA3 Navarretia tagetina Greene marigold pincushionplant WA (T)
NEPE4 Neckera pennata Hedw. neckera moss KY (T)
NELU Nelumbo lutea Willd. American lotus MI (T), NJ (E), PA (E)
NETW Nemacladus twisselmannii J.T. Howell Twisselmann's threadplant CA (R)
NEFL Nemastylis floridana Small fallflowering pleatleaf FL (E)
NEAP Nemophila aphylla (L.) Brummitt smallflower baby blue eyes KY (T)
NEAQ2 Neobeckia aquatica (Eaton) Greene lakecress TN (SC), VT (T)
ARAQ Armoracia aquatica (Eaton) Wiegand IN (E)
ARLA22 Armoracia lacustris (A. Gray) Al-Shehbaz & V.M. Bates KY (T), ME (PX), MD (E), MI (T), NJ (E), OH (T), WI (E)
ROAQ Rorippa aquatica (Eaton) Palmer & Steyerm. NY (T)
NECO2 Neostapfia colusana (Burtt Davy) Burtt Davy Colusagrass T CA (E)
NEHU2 Neotorularia humilis (C.A. Mey.) Hedge & J. Léonard low northern-rockcress
BRHU Braya humilis (C.A. Mey.) B.L. Rob. MI (T), VT (T)
NEBI Nephrolepis biserrata (Sw.) Schott giant swordfern FL (T)
NEAN Neraudia angulata Cowan angularfruit ma'oloa E
NEOV Neraudia ovata Gaudich. Big Island ma'oloa E
NESE2 Neraudia sericea Gaudich. woodland ma'oloa E
NERO Nesogenes rotensis Fosberg & D.R. Herbst E
NEUM Nestronia umbellula Raf. leechbrush GA (T), KY (E), TN (E), VA (E)
NELA Neurodium lanceolatum (L.) Fée ribbon fern FL (E)
NEAL Neviusia alabamensis A. Gray Alabama snow-wreath AR (T), GA (T), TN (T)
NIAT Nicotiana attenuata Torr. ex S. Watson coyote tobacco WA (S)
NIMO Nitrophila mohavensis Munz & Roos Amargosa niterwort E CA (E), NV (FP)
NOCA3 Noccaea californica (S. Watson) Kartesz, ined. Kneeland Prairie pennycress
THCA3 Thlaspi californicum S. Watson E
NOAT Nolina atopocarpa Bartlett Florida beargrass FL (T)
NOBI Nolina bigelovii (Torr.) S. Watson Bigelow's nolina AZ (SR, HR)
NOBR Nolina brittoniana Nash Britton's beargrass E FL (E)
NOIN Nolina interrata Gentry Dehesa beargrass CA (E)
NOMI Nolina microcarpa S. Watson sacahuista AZ (SR, HR)
NOPA Nolina parryi S. Watson Parry's beargrass AZ (SR, HR)
NOTE Nolina texana S. Watson Texas sacahuista
NOTEC Nolina texana S. Watson var. compacta (Trel.) I.M. Johnst. AZ (SR, HR)
NOCU Nothocalais cuspidata (Pursh) Greene prairie false dandelion IL (E)
NOBR2 Nothocestrum breviflorum A. Gray smallflower aiea E
NOPE Nothocestrum peltatum Skottsb. Oahu aiea E
NOBI2 Nothoscordum bivalve (L.) Britton crowpoison IN (R), OH (T)
NOTE2 Nothoscordum texanum M.E. Jones Texas false garlic AZ (SR)
NOHU Nototrichium humile Hillebr. kaala rockwort E
NULUA Nuphar lutea (L.) Sm. ssp. advena (Aiton) Kartesz & Gandhi yellow pond-lily
NUAD2 Nuphar advena (Aiton) W.T. Aiton CT (SC), ME (SC)
NULUP2 Nuphar lutea (L.) Sm. ssp. pumila (Timm) E.O. Beal yellow pond-lily
NUMI4 Nuphar microphylla (Pers.) Fernald CT (SC), MA (E), NJ (E)
NUPU2 Nuphar pumila (Timm) DC. MI (E)
NULUV Nuphar lutea (L.) Sm. ssp. variegata (Durand) E.O. Beal varigated yellow pond-lily
NUVA2 Nuphar variegata Durand OH (E)
NUCA Nuttallanthus canadensis (L.) D.A. Sutton Canada toadflax
LICA6 Linaria canadensis (L.) Chaz. OH (E)
NYJA Nymphaea jamesoniana Planch. James' waterlily FL (E)
NYLE Nymphaea leibergii Morong Leiberg's waterlily ME (T), MN (T)
NYODT Nymphaea odorata Aiton ssp. tuberosa (Paine) Wiersma & Hellquist American white waterlily CT (SC)
NYTE Nymphaea tetragona Georgi pygmy waterlily WA (PX)
NYAQ Nymphoides aquatica (J.F. Gmel.) Kuntze big floatingheart MD (E)
NYCO Nymphoides cordata (Elliot) Fernald little floatingheart MD (E), PA (T)
OCKI Ochrosia kilaueaensis H. St. John Hawai'i yellowwood E
OCCA5 Ocimum campechianum Mill. least basil FL (E)
OCAC Oclemena acuminata (Michx.) Greene whorled wood aster
ASAC6 Aster acuminatus Michx. KY (T), OH (PRX)
OCBL Oclemena ×blakei (Porter) G.L. Nesom [acuminata × nemoralis]
ASBL7 Aster blakei (Porter) House CT (E)
OCNE2 Oclemena nemoralis (Aiton) Greene bog aster
ASNE Aster nemoralis Aiton CT (E), PA (E)
ODCL Odontosoria clavata L. clubbed creepingfern
SPCL2 Sphenomeris clavata (L.) Maxon FL (E)
OEAR Oenothera argillicola Mack. shale barren evening primrose PA (T)
OECAC2 Oenothera caespitosa Nutt. ssp. caespitosa tufted evening primrose WA (S)
OECAM4 Oenothera caespitosa Nutt. ssp. marginata (Nutt. ex Hook. & Arn.) Munz tufted evening primrose WA (S)
OECAE2 Oenothera californica (S. Watson) S. Watson ssp. eurekensis (Munz & Roos) W. Klein Eureka Dunes evening primrose CA (R)
OEAVE Oenothera avita (W. Klein) W. Klein ssp. eurekensis (Munz & Roos) W. Klein E
OECL3 Oenothera clelandii W. Dietr., P.H. Raven & W.L. Wagner Cleland's evening primrose OH (E)
OEDEH Oenothera deltoides Torr. & Frém. ssp. howellii (Munz) W. Klein Antioch Dunes evening primrose E CA (E)
OEFL Oenothera flava (A. Nelson) Garrett yellow evening primrose WA (PX)
OEFR Oenothera fruticosa L. narrowleaf evening primrose CT (SC)
OEHU Oenothera humifusa Nutt. seabeach evening primrose NJ (E)
OELA Oenothera laciniata Hill cutleaf evening primrose NY (E)
OELI Oenothera linifolia Nutt. threadleaf evening primrose KY (E)
OEMAM Oenothera macrocarpa Nutt. ssp. macrocarpa bigfruit evening primrose TN (T)
OEOA Oenothera oakesiana (A. Gray) J.W. Robbins ex S. Watson & J.M. Coult. Oakes' evening primrose KY (H), OH (T)
OEPAO Oenothera parviflora L. var. oakesiana (A. Gray) Fernald NY (T)
OEPA5 Oenothera parviflora L. northern evening primrose OH (T), TN (SC)
OEPE Oenothera perennis L. little evening primrose IL (T), IN (T), IA (T), KY (E)
OEPIS Oenothera pilosella Raf. ssp. sessilis (Pennell) Straley meadow evening primrose AR (T)
OETR2 Oenothera triloba Nutt. stemless evening primrose IN (X), KY (T)
OEWO Oenothera wolfii (Munz) P.H. Raven, W. Dietr. & Stubbe Wolf's evening primrose OR (T)
OKHY Okenia hypogaea Schltdl. & Cham. burrowing four o'clock FL (E)
OLUN Oldenlandia uniflora L. clustered mille graines KY (E), NY (E)
OLAL2 Oligoneuron album (Nutt.) G.L. Nesom prairie goldenrod
ASPT4 Aster ptarmicoides (Nees) Torr. & A. Gray NH (E)
SOPT4 Solidago ptarmicoides (Nees) B. Boivin CT (E), IN (R), MA (E), NC (E), OH (PRX), TN (E)
OLHO Oligoneuron houghtonii (Torr. & A. Gray ex A. Gray) G.L. Nesom Houghton's goldenrod
SOHO Solidago houghtonii Torr. & A. Gray ex A. Gray T MI (T), NY (E)
OLOH Oligoneuron ohioense (Frank ex Riddell) G.N. Jones Ohio goldenrod
SOOH Solidago ohioensis Frank ex Riddell NY (T)
OLRI2 Oligoneuron riddellii (Frank ex Riddell) Rydb. Riddell's goldenrod
SORI Solidago riddellii Frank ex Riddell AR (T)
OLRIR Oligoneuron rigidum (L.) Small var. rigidum stiff goldenrod
SORI2 Solidago rigida L. CT (E), MD (E, X), NJ (E), NY (T), PA (E), RI (H)
OLTE Olneya tesota A. Gray desert ironwood AZ (SA, HR)
OMSU Omalotheca supina (L.) DC. alpine arctic cudweed ME (E)
GNSU2 Gnaphalium supinum L. NH (E)
OMSY Omalotheca sylvatica (L.) Sch. Bip. & F.W. Schultz woodland arctic cudweed ME (SC), VT (E)
GNSY2 Gnaphalium sylvaticum L. MI (T), NY (E)
ONFL Oncidium floridanum Ames Florida orchid FL (E)
ONRA Oncophorus raui (Austin) Grout oncophorus moss KY (E)
ONBEB Onosmodium bejariense DC. ex A. DC. var. bejariense soft-hair marbleseed
ONMO Onosmodium molle Michx. MD (E), MI (PREX)
ONMOM Onosmodium molle Michx. ssp. molle KY (E)
ONBEH Onosmodium bejariense DC. ex A. DC. var. hispidissimum (Mack.) B.L. Turner softhair marbleseed
ONHI Onosmodium hispidissimum Mack. IN (E), PA (E), TN (SC)
ONMOH2 Onosmodium molle Michx. ssp. hispidissimum (Mack.) B. Boivin KY (E)
ONBEO Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner western marbleseed
ONMOO2 Onosmodium molle Michx. ssp. occidentale (Mack.) Cochrane KY (E), TN (T)
ONBES Onosmodium bejariense DC. ex A. DC. var. subsetosum (Mack. & Bush) B.L. Turner softhair marbleseed
ONMOS Onosmodium molle Michx. ssp. subsetosum (Mack. & Bush) Cochrane TN (E)
ONVI2 Onosmodium virginianum (L.) A. DC. wild Job's tears CT (E), MD (E), NJ (E), NY (E), PA (X), RI (H)
OPCR Ophioglossum crotalophoroides Walter bulbous adderstongue TN (SC)
OPEN Ophioglossum engelmannii Prantl limestone adderstongue IN (R), OH (E), PA (E)
OPPU3 Ophioglossum pusillum Raf. northern adderstongue ME (SC), MA (T), NY (EV), RI (E), WA (T)
OPVU3 Ophioglossum vulgatum auct. non L. CT (T)
OPVU Ophioglossum vulgatum L. southern adderstongue MI (T)
OPPY3 Ophioglossum pycnostichum (Fernald) Á. Löve & D. Löve PA (X)
OPVUP2 Ophioglossum vulgatum L. var. pycnostichum Fernald NJ (E)
OPHO Oplopanax horridus (Sm.) Miq. devilsclub MI (T)
OPAU2 Opuntia aurea E.M. Baxter golden pricklypear
OPBAA Opuntia basilaris Engelm. & Bigelow var. aurea (E.M. Baxter) W.T. Marsh. AZ (SR)
OPBAB2 Opuntia basilaris Engelm. & Bigelow var. basilaris beavertail pricklypear AZ (SR), NV (CY)
OPBAL Opuntia basilaris Engelm. & Bigelow var. longiareolata (Clover & Jotter) L.D. Benson beavertail pricklypear AZ (SR)
OPBAT Opuntia basilaris Engelm. & Bigelow var. treleasei (J.M. Coult.) J.M. Coult. ex Toumey Trelease's beavertail pricklypear AZ (SR), CA (E)
OPTR3 Opuntia treleasei J.M. Coult. E
OPCH Opuntia chlorotica Engelm. & Bigelow dollarjoint pricklypear AZ (SR), NV (CY)
OPCU2 Opuntia ×curvospina Griffiths (pro sp.) [chlorotica × phaeacantha] searchlight pricklypear AZ (SR)
OPENE Opuntia engelmannii Salm-Dyck ex Engelm. var. engelmannii cactus apple AZ (SR)
OPENF Opuntia engelmannii Salm-Dyck ex Engelm. var. flavispina (L.D. Benson) Parfitt & Pinkava cactus apple AZ (SR)
OPFR Opuntia fragilis (Nutt.) Haw. brittle pricklypear IL (E), IA (T), MI (E), NV (CY), WI (T)
OPFRB Opuntia fragilis (Nutt.) Haw. var. brachyarthra (Engelm. & Bigelow) J.M. Coult. AZ (SR)
OPFRF Opuntia fragilis (Nutt.) Haw. var. fragilis AZ (SR)
OPHU Opuntia humifusa (Raf.) Raf. devil's-tongue CT (SC), MA (E), NY (EV), PA (R)
OPLA2 Opuntia laevis J.M. Coult. tulip pricklypear
OPPHL Opuntia phaeacantha Engelm. var. laevis (J.M. Coult.) L.D. Benson AZ (SR)
OPMA8 Opuntia macrocentra Engelm. purple pricklypear AZ (SR)
OPMA2 Opuntia macrorhiza Engelm. twistspine pricklypear IA (E)
OPMAM3 Opuntia macrorhiza Engelm. var. macrorhiza twistspine pricklypear AZ (SR)
OPMAP Opuntia macrorhiza Engelm. var. pottsii (Salm-Dyck) L.D. Benson twistspine pricklypear AZ (SR)
OPMA3 Opuntia martiniana (L.D. Benson) Parfitt seashore cactus AZ (SR)
OPPH Opuntia phaeacantha Engelm. tulip pricklypear NV (CY)
OPCA2 Opuntia canada Griffiths AZ (SR)
OPCH4 Opuntia charlestonensis Clokey NV (CY)
OPPHM Opuntia phaeacantha Engelm. var. major Engelm. AZ (SR)
OPPHP Opuntia phaeacantha Engelm. var. phaeacantha AZ (SR)
OPPHS2 Opuntia phaeacantha Engelm. var. superbospina (Griffiths) L.D. Benson AZ (SR)
OPPOA Opuntia polyacantha Haw. var. arenaria (Engelm.) Parfitt El Paso pricklypear
OPAR3 Opuntia arenaria Engelm. NM (E)
OPPOE Opuntia polyacantha Haw. var. erinacea (Engelm. & J.M. Bigelow ex Engelm.) Parfitt grizzlybear pricklypear
OPERE Opuntia erinacea Engelm. & Bigelow ex Engelm. var. erinacea AZ (SR), NV (CY)
OPPOH Opuntia polyacantha Haw. var. hystricina (Engelm. & J.M. Bigelow) Parfitt grizzlybear pricklypear
OPERH Opuntia erinacea Engelm. & Bigelow ex Engelm. var. hystricina (Engelm. & Bigelow) L.D. Benson AZ (SR)
OPPON Opuntia polyacantha Haw. var. nicholii (L.D. Benson) Parfitt Navajo Bridge pricklypear
OPNI Opuntia nicholii L.D. Benson AZ (SR)
OPPOP Opuntia polyacantha Haw. var. polyacantha hairspine pricklypear NV (CY)
OPERU Opuntia erinacea Engelm. & Bigelow ex Engelm. var. ursina (F.A.C. Weber) Parish AZ (SR)
OPERU2 Opuntia erinacea Engelm. & Bigelow ex Engelm. var. utahensis (Engelm.) L.D. Benson AZ (SR), NV (CY)
OPPOJ Opuntia polyacantha Haw. var. juniperina (Britton & Rose) L.D. Benson AZ (SR)
OPPOR Opuntia polyacantha Haw. var. rufispina (Engelm. & Bigelow ex Engelm.) L.D. Benson AZ (SR), NV (CY)
OPPOT Opuntia polyacantha Haw. var. trichophora (Engelm. & Bigelow) J.M. Coult. AZ (SR)
OPSA Opuntia santa-rita (Griffiths & Hare) Rose Santa Rita pricklypear AZ (SR)
OPST2 Opuntia stricta (Haw.) Haw. erect pricklypear FL (T)
OPTR Opuntia triacantha (Willd.) Sweet Spanish lady FL (E)
OPVA4 Opuntia ×vaseyi (J.M. Coult.) Britton & Rose [littoralis × phaeacantha] Vasey's coastal pricklypear
OPLIV Opuntia littoralis (Engelm.) Cockerell var. vaseyi (J.M. Coult.) L.D. Benson & Walkington AZ (SR)
ORMA2 Orbexilum macrophyllum (Rowlee) Rydb. largeleaf leather-root NC (E)
ORON Orbexilum onobrychis (Nutt.) Rydb. French-grass
PSON Psoralea onobrychis Nutt. IA (E)
ORCA Orcuttia californica Vasey California Orcutt grass E CA (E)
ORIN Orcuttia inaequalis Hoover San Joaquin Valley Orcutt grass T CA (E)
ORPI Orcuttia pilosa Hoover hairy Orcutt grass E CA (E)
ORTE Orcuttia tenuis Hitchc. slender Orcutt grass T CA (E)
ORVI2 Orcuttia viscida (Hoover) J. Reeder Sacramento Orcutt grass E CA (E)
ORFA Orobanche fasciculata Nutt. clustered broomrape IL (E), IN (E), IA (E), MI (T), WI (T)
ORLU Orobanche ludoviciana Nutt. Louisiana broomrape IL (T), IN (T), KY (H), OH (PRX), TN (SC), WI (E)
ORAQ Orontium aquaticum L. goldenclub CT (SC), KY (T), MA (E), NY (T), PA (R), RI (E)
ORSE Orthilia secunda (L.) House sidebells wintergreen MD (E, X), OH (PRX)
PYSE Pyrola secunda L. CT (SC), IN (X), IA (T), RI (T)
ORBR Orthocarpus bracteosus Benth. rosy owl's-clover WA (T)
ORPE2 Orthodontium pellucens (Hook.) Bruch & Schimp. orthodontium moss TN (SC)
ORDI3 Orthotrichum diaphanum Brid. orthotrichum moss KY (E)
ORKE Orthotrichum keeverae H.A. Crum & L.E. Anderson Keever's orthotrichum moss NC (E)
ORAS Oryzopsis asperifolia Michx. roughleaf ricegrass IN (E), MD (T), NJ (E), OH (E)
OSBE Osmorhiza berteroi DC. sweetcicely ME (T), MN (E)
OSCH Osmorhiza chilensis Hook. & Arn. NH (E)
OSDE Osmorhiza depauperata Phil. bluntseed sweetroot MI (T)
OSLO Osmorhiza longistylis (Torr.) DC. longstyle sweetroot RI (T)
OSMA Osmoxylon mariannense (Kaneh.) Fosberg & Sachet E
OSCI Osmunda cinnamomea L. cinnamon fern FL (CE), IA (E), NY (EV)
OSCL2 Osmunda claytoniana L. interrupted fern AR (T), NY (EV)
OSRE Osmunda regalis L. royal fern FL (CE), IA (T), NY (EV)
OTRH Ottoschulzia rhodoxylon (Urb.) Urb. pincho palo de rosa E PR (E)
OXIL Oxalis illinoensis Schwegm. Illinois woodsorrel IL (E), IN (R)
OXMO Oxalis montana Raf. mountain woodsorrel OH (PRX)
OXPR Oxalis priceae Small tufted yellow woodsorrel KY (H)
OXSU Oxalis suksdorfii Trel. Suksdorf woodsorrel WA (S)
OXVI Oxalis violacea L. violet woodsorrel CT (SC), MA (E), MI (T), NY (T), RI (E)
OXAR Oxydendrum arboreum (L.) DC. sourwood IN (T), MD (E)
OXCA2 Oxypolis canbyi (J.M. Coult. & Rose) Fernald Canby's cowbane E GA (E), MD (E), NC (E)
OXGR5 Oxypolis greenmanii Mathias & Constance giant cowbane FL (E)
OXRI Oxypolis rigidior (L.) Raf. stiff cowbane NY (E)
OXDI3 Oxyria digyna (L.) Hill alpine mountainsorrel NH (T)
OXPAG Oxytheca parishii Parry var. goodmaniana Ertter Cushenbury oxytheca E
OXBOV Oxytropis borealis DC. var. viscida (Nutt.) S.L. Welsh viscid locoweed WA (S)
OXVI2 Oxytropis viscida Nutt. MN (E)
OXCA4 Oxytropis campestris (L.) DC. field locoweed ME (T)
OXCAC Oxytropis campestris (L.) DC. var. chartacea (Fassett) Barneby field locoweed T WI (E)
OXCAC2 Oxytropis campestris (L.) DC. var. columbiana (H. St. John) Barneby field locoweed WA (T)
OXCAW Oxytropis campestris (L.) DC. var. wanapum E. Joyal field locoweed WA (E)
OXMO2 Oxytropis monticola A. Gray yellowflower locoweed
OXCAG Oxytropis campestris (L.) DC. var. gracilis (A. Nelson) Barneby WA (S)
PASC14 Pachycereus schottii (Engelm.) D.R. Hunt senita cactus
LOSC5 Lophocereus schottii (Engelm.) Britton & Rose AZ (SR)
PAPR7 Pachysandra procumbens Michx. Allegheny-spurge FL (E), IN (E)
PAAN6 Packera anonyma (Alph. Wood) W.A. Weber & Á. Löve Small's ragwort
SEAN2 Senecio anonymus Alph. Wood PA (R)
PAAN7 Packera antennariifolia (Britton) W.A. Weber & Á. Löve shale barren ragwort
SEAN3 Senecio antennariifolius Britton PA (E)
PACA15 Packera cana (Hook.) W.A. Weber & Á. Löve woolly groundsel
SECA2 Senecio canus Hook. MN (E)
PAFR6 Packera franciscana (Greene) W.A. Weber & Á. Löve San Francisco Peaks ragwort
SEFR2 Senecio franciscanus Greene T AZ (HS)
PAGA5 Packera ganderi (T.M. Barkley & R.M. Beauch.) W.A. Weber & Á. Löve Gander's ragwort
SEGA Senecio ganderi T.M. Barkley & R.M. Beauch. CA (R)
PAIN11 Packera indecora (Greene) Á. Löve & D. Löve elegant groundsel
SEIN Senecio indecorus Greene MI (T), WI (T)
PALA41 Packera layneae (Greene) W.A. Weber & Á. Löve Layne's ragwort
SELA4 Senecio layneae Greene T CA (R)
PAMI25 Packera millefolium (Torr. & A. Gray) W.A. Weber & Á. Löve piedmont ragwort
SEMI2 Senecio millefolium Torr. & A. Gray GA (T), NC (T)
PAPA20 Packera paupercula (Michx.) Á. Löve & D. Löve balsam groundsel
SEPA5 Senecio pauperculus Michx. CT (E), NH (T), OH (T)
PAPL12 Packera plattensis (Nutt.) W.A. Weber & Á. Löve prairie groundsel
SEPL Senecio plattensis Nutt. PA (X)
PAQU7 Packera quaerens (Greene) W.A. Weber & Á. Löve Mogollon Mountain ragwort
SEQU2 Senecio quaerens Greene AZ (SR)
PASC19 Packera schweinitziana (Nutt.) W.A. Weber & Á. Löve Schweinitz's ragwort
SESC4 Senecio schweinitzianus Nutt. NC (E), TN (T)
PAQU Panax quinquefolius L. American ginseng CT (SC), ME (E), MA (SC), MI (T), NH (T), NY (EV), NC (SC), PA (V), RI (E), TN (SC, CE)
PAAB Panicum abscissum Swallen cutthroat grass FL (E)
PAAM2 Panicum amarum Elliot bitter panicgrass CT (T), RI (SC)
PAAMA2 Panicum amarum Elliot var. amarulum (Hitchc. & Chase) P.G. Palmer coastal panicgrass PA (E)
PAFAC Panicum fauriei Hitchc. var. carteri (Hosaka) Davidse Faurie's panicgrass E
PAFL2 Panicum flexile (Gattinger) Scribn. wiry panicgrass MD (E), NJ (E), NY (T), VT (E)
PAGA Panicum gattingeri Nash Gattinger's panicgrass
PAPHG Panicum philadelphicum Bernh. ex Trin. ssp. gattingeri (Nash) Freckmann & Lelong MA (SC)
PAHE2 Panicum hemitomon Schult. maidencane TN (SC)
PANI Panicum niihauense H. St. John Niihau panicgrass E
PAPH Panicum philadelphicum Bernh. ex Trin. Philadelphia panicgrass IA (T), MA (SC), NH (E), OH (T), RI (SC)
PATU Panicum tuckermanii Fernald OH (E), PA (T)
PARI4 Panicum rigidulum Bosc ex Nees redtop panicgrass RI (SC)
PARIE2 Panicum rigidulum Bosc ex Nees var. elongatum (Pursh) Lelong redtop panicgrass CT (SC)
PAST12 Panicum stipitatum Nash NY (E)
PARIP Panicum rigidulum Bosc ex Nees var. pubescens (Vasey) Lelong redtop panicgrass MA (T)
PALO Panicum longifolium Torr. IN (X), MI (T), OH (PRX)
PAVE2 Panicum verrucosum Muhl. warty panicgrass CT (SC), IN (T), MI (T), OH (E)
PAPE5 Parietaria pensylvanica Muhl. ex Willd. Pennsylvania pellitory ME (PX)
PAFL6 Parkinsonia florida (Benth. ex A. Gray) S. Watson blue paloverde
CEFL6 Cercidium floridum Benth. ex A. Gray AZ (SA)
PAMI5 Parkinsonia microphylla Torr. yellow paloverde
CEMI6 Cercidium microphyllum (Torr.) Rose & I.M. Johnst. AZ (SA)
PAMA20 Parmotrema madagascariaceum (Hue) Hale Madagascar parmotrema lichen OH (E)
PAST14 Parmotrema stuppeum (Taylor) Hale parmotrema lichen
PAST17 Parmelia stuppea Taylor MN (T)
PAAS2 Parnassia asarifolia Vent. kidneyleaf grass of Parnassus KY (E), MD (E)
PACA13 Parnassia caroliniana Michx. Carolina grass of Parnassus FL (E), NC (E)
PAFIH Parnassia fimbriata K.D. Koenig var. hoodiana C.L. Hitchc. fringed grass of Parnassus WA (S)
PAGL3 Parnassia glauca Raf. fen grass of Parnassus ME (SC), NH (T), NY (EV), PA (E), RI (H)
PAGR Parnassia grandifolia DC. largeleaf grass of Parnassus FL (E), KY (E), NC (T), TN (SC)
PAKO3 Parnassia kotzebuei Cham. ex Spreng. Kotzebue's grass of Parnassus WA (S)
PAPA8 Parnassia palustris L. marsh grass of Parnassus MI (T), WI (T)
PAPAP2 Parnassia palustris L. var. parviflora (DC.) B. Boivin smallflower grass of Parnassus
PAPA9 Parnassia parviflora DC. WI (E)
PAPAT Parnassia palustris L. var. tenuis Wahlenb. marsh grass of Parnassus
PAPAN Parnassia palustris L. var. neogaea Fernald WA (S)
PAAR4 Paronychia argyrocoma (Michx.) Nutt. silvery nailwort KY (E), ME (T), MA (E), TN (T)
PAARA Paronychia argyrocoma (Michx.) Nutt. var. albimontana Fernald NH (T)
PACA11 Paronychia canadensis (L.) Alph. Wood smooth forked nailwort MN (T), NH (T)
PACH6 Paronychia chartacea Fernald paper nailwort T FL (E)
PAFA3 Paronychia fastigiata (Raf.) Fernald hairy forked nailwort CT (SC), MN (E)
PAFAN Paronychia fastigiata (Raf.) Fernald var. nuttallii (Small) Fernald hairy forked nailwort PA (E)
PAVI4 Paronychia virginica Spreng. yellow nailwort MD (E)
PAIN3 Parthenium integrifolium L. wild quinine MD (E), MN (E), PA (X), WI (T)
PACH16 Paspalidium chapmanii (Vasey) Pohl Chapman's bristlegrass
SECH2 Setaria chapmanii (Vasey) Pilg. FL (E)
PABO3 Paspalum boscianum Flueggé bull crowngrass KY (SC)
PADI5 Paspalum dissectum (L.) L. mudbank crowngrass IL (E), MD (T)
PAFL4 Paspalum floridanum Michx. Florida paspalum
PAFLG Paspalum floridanum Michx. var. glabratum Engelm. ex Vasey PA (X)
PAFL5 Paspalum fluitans (Elliot) Kunth horsetail paspalum MD (E)
PALA10 Paspalum laeve Michx. field paspalum CT (E)
PALAC Paspalum laeve Michx. var. circulare (Nash) Stone NY (E)
PALAP Paspalum laeve Michx. var. pilosum Scribn. NY (E)
PASE5 Paspalum setaceum Michx. thin paspalum NY (T)
PASEP Paspalum setaceum Michx. var. psammophilum (Nash) D. Banks CT (SC), NY (E), RI (SC)
PAIN6 Passiflora incarnata L. purple passionflower IN (R), OH (T)
PALU2 Passiflora lutea L. yellow passionflower PA (E)
PAMU4 Passiflora multiflora L. whiteflower passionflower FL (E)
PAPA14 Passiflora pallens Poepp. ex Masters pineland passionflower FL (E)
PASE6 Passiflora sexflora Juss. goatsfoot FL (E)
PAPA28 Pavonia paludicola Nicolson ex Fryxell swampbush FL (E)
PACA Paxistima canbyi A. Gray Canby's mountain-lover KY (T), MD (E), OH (E), PA (E), TN (E)
PEDI8 Pecluma dispersa (A.M. Evans) M.G. Price widespread rockcap fern
PODI3 Polypodium dispersum A.M. Evans FL (E)
PEPL5 Pecluma plumula (Humb. & Bonpl. ex Willd.) M.G. Price plumed rockcap fern
POPL2 Polypodium plumula Humb. & Bonpl. ex Willd. FL (E)
PEPTP2 Pecluma ptilodon (Kunze) M.G. Price ssp. ptilodon (Kunze) M.G. Price [excluded] palmleaf rockcap fern
POPT2 Polypodium ptilodon Kunze FL (E)
PEDU Pedicularis dudleyi Elmer Dudley's lousewort CA (R)
PEFU Pedicularis furbishiae S. Watson Furbish's lousewort E ME (E)
PELA2 Pedicularis lanceolata Michx. swamp lousewort CT (SC), KY (H), MD (E), MA (E), NY (T), PA (E), TN (T)
PERA6 Pedicularis rainierensis Pennell & Warren Mt. Rainier lousewort WA (S)
PEIN16 Pedinophyllum interruptum (Nees) Kaal. TN (SC)
PEBR2 Pediocactus bradyi L.D. Benson Brady's pincushion cactus E AZ (HS)
PEDE17 Pediocactus despainii S.L. Welsh & Goodrich Despain's pincushion cactus E
PEKN2 Pediocactus knowltonii L.D. Benson Knowlton's miniature cactus E NM (E)
PEPA5 Pediocactus paradinei B.W. Benson Kaibab pincushion cactus AZ (HS)
PEPE8 Pediocactus peeblesianus (Croizat) L.D. Benson Navajo pincushion cactus
PEPEF Pediocactus peeblesianus (Croizat) L.D. Benson var. fickeiseniae L.D. Benson AZ (HS)
PEPEP2 Pediocactus peeblesianus (Croizat) L.D. Benson var. peeblesianus E AZ (HS)
PESIR Pediocactus simpsonii (Engelm.) Britton & Rose var. robustior (J.M. Coult.) L.D. Benson mountain ball cactus NV (CY)
PESIS Pediocactus simpsonii (Engelm.) Britton & Rose var. simpsonii mountain ball cactus AZ (SR), NV (CY)
PEWI2 Pediocactus winkleri K.D. Heil Winkler's pincushion cactus T
PEDI9 Pediomelum digitatum (Nutt. ex Torr. & A. Gray) Isely palmleaf Indian breadroot
PSDIP Psoralea digitata Nutt. ex Torr. & A. Gray var. parvifolia Shinners AR (T)
PEHYS2 Pediomelum hypogaeum (Nutt. ex Torr. & A. Gray) Rydb. var. subulatum (Bush) J. Grimes subterranean Indian breadroot
PSSU Psoralea subulata Bush AR (E)
PEAD3 Pelexia adnata (Sw.) Spreng. hachuela
SPAD Spiranthes adnata (Sw.) Benth. ex Fawc. FL (E)
PEAT2 Pellaea atropurpurea (L.) Link purple cliffbrake FL (E), IA (E), MI (T), NY (EV), RI (E)
PEBR3 Pellaea brachyptera (T. Moore) Baker Sierra cliffbrake WA (S)
PEBR4 Pellaea breweri D.C. Eaton Brewer's cliffbrake WA (S)
PEGL Pellaea glabella Mett. ex Kuhn smooth cliffbrake CT (E), MD (E), NY (T)
PEWR Pellaea wrightiana Hook. Wright's cliffbrake NC (SC, E)
PEVI Peltandra virginica (L.) Schott green arrow arum IA (E)
PEGR3 Peniocereus greggii (Engelm.) Britton & Rose nightblooming cereus NM (E)
PEGRG Peniocereus greggii (Engelm.) Britton & Rose var. greggii nightblooming cereus AZ (SR), NM (E)
PEGRT Peniocereus greggii (Engelm.) Britton & Rose var. transmontanus (Engelm.) Backeb. nightblooming cereus AZ (SR)
PEAL3 Penstemon albomarginatus M.E. Jones whitemargin beardtongue AZ (SR)
PEBA7 Penstemon barrettiae A. Gray Barrett's beardtongue WA (T)
PEBIR Penstemon bicolor (Brandegee) Clokey & D.D. Keck ssp. roseus Clokey & D.D. Keck pinto beardtongue AZ (SR)
PECA7 Penstemon calycosus Small longsepal beardtongue MI (T)
PECA8 Penstemon canescens (Britton) Britton eastern gray beardtongue IN (T), OH (T)
PECL5 Penstemon clutei A. Nelson Sunset Crater beardtongue AZ (SR)
PEDE10 Penstemon deamii Pennell Deam's beardtongue IN (R)
PEDEV2 Penstemon deustus Douglas ex Lindl. var. variabilis (Suksd.) Cronquist scabland penstemon WA (S)
PEDI Penstemon digitalis Nutt. ex Sims talus slope penstemon RI (SC)
PEDI6 Penstemon discolor D.D. Keck Cataiina beardtongue AZ (HS)
PEDI7 Penstemon dissectus Elliot dissected beardtongue GA (R)
PEDI10 Penstemon distans N.H. Holmgren Mt. Tumbull beardtongue AZ (SR)
PEGR5 Penstemon gracilis Nutt. lilac penstemon IA (T), MI (E)
PEGR7 Penstemon grandiflorus Nutt. large beardtongue IL (E)
PEHA12 Penstemon haydenii S. Watson blowout beardtongue E NE (E)
PEHI Penstemon hirsutus (L.) Willd. hairy beardtongue MA (E), RI (SC)
PELA8 Penstemon laevigatus Aiton eastern smooth beardtongue NJ (E), OH (E)
PELIM Penstemon linarioides A. Gray ssp. maguirei D.D. Keck Maguire's penstemon AZ (SR)
PEMU2 Penstemon murrayanus Hook. scarlet beardtongue AR (T)
PEPA7 Penstemon pallidus Small pale beardtongue OH (T)
PEBR10 Penstemon brevisepalus Pennell IL (E)
PEPE25 Penstemon penlandii W.A. Weber Penland's beardtongue E
PETU Penstemon tubiflorus Nutt. white wand beardtongue IN (X), OH (PRX), TN (SC)
PEBE Pentachaeta bellidiflora Greene whiteray pygmydaisy E CA (E)
PELY4 Pentachaeta lyonii A. Gray Lyon's pygmydaisy E CA (E)
PESE6 Penthorum sedoides L. ditch stonecrop RI (SC)
PEAM6 Peperomia amplexicaulis (Sw.) A. Dietr. Jackie's saddle FL (E)
PEGL7 Peperomia glabella (Sw.) A. Dietr. cypress peperomia FL (E)
PEHU3 Peperomia humilis A. Dietr. Polynesian peperomia FL (E)
PEMA5 Peperomia magnoliifolia (Jacq.) A. Dietr. spoonleaf peperomia FL (E)
PEOB2 Peperomia obtusifolia (L.) A. Dietr. baby rubberplant FL (E)
PERO5 Peperomia rotundifolia (L.) Kunth yerba linda FL (E)
PEWH2 Peperomia wheeleri Britton Wheeler's peperomia E PR (E)
PEAM2 Perideridia americana (Nutt. ex DC.) Rchb. eastern yampah IN (E), KY (T), OH (PRX), TN (E)
PEAJ Perityle ajoensis T.K. Todsen Ajo rockdaisy AZ (SR)
PECO17 Perityle cochisensis (Niles) A. Powell Cochise rockdaisy AZ (SR)
PEBO Persea borbonia (L.) Spreng. redbay MD (E)
PEPA37 Persea palustris (Raf.) Sarg. swamp bay AR (E)
PEFRP Petasites frigidus (L.) Fr. var. palmatus (Aiton) Cronquist arctic sweet coltsfoot CT (T), MA (E), NH (E), NY (E), VT (T)
PEFRS5 Petasites frigidus (L.) Fr. var. sagittatus (Banks ex Pursh) Cherniawsky arrowleaf sweet coltsfoot
PESA5 Petasites sagittatus (Banks ex Pursh) A. Gray MI (T), WI (T)
PECI4 Petrophytum cinerascens (Piper) Rydb. halfshrub rockmat WA (T)
PESA6 Peucedanum sandwicense Hillebr. makou T
PHAR Phacelia argentea A. Nelson & J.F. Macbr. sanddune phacelia OR (T)
PHAR2 Phacelia argillacea N.D. Atwood Attwood's phacelia E
PHCO30 Phacelia covillei S. Watson Coville's phacelia MD (E)
PHDU Phacelia dubia (L.) Trel. smallflower phacelia OH (PRX)
PHFO2 Phacelia formosula Osterh. Northpark phacelia E
PHFR Phacelia franklinii (R. Br.) A. Gray Franklin's phacelia MI (T)
PHGI Phacelia gilioides Brand Brand's phacelia IL (E)
PHIN10 Phacelia inconspicua Greene hidden phacelia NV (FP)
PHINI4 Phacelia insularis Munz var. insularis northern Channel Islands phacelia E
PHLE12 Phacelia lenta Piper sticky phacelia WA (T)
PHMI7 Phacelia minutissima L.F. Hend. small phacelia WA (S)
PHRA3 Phacelia ranunculacea (Nutt.) Constance oceanblue phacelia IN (E), KY (SC), OH (E), TN (SC)
PHTE Phacelia tetramera J.T. Howell fourpart phacelia WA (S)
PHLE17 Phaeophyscia leana (Tuck.) Essl. wreath lichen KY (E)
PHCA6 Phalaris caroliniana Walter Carolina canarygrass MD (E, X)
PHLA21 Pharus lappulaceus Aubl. Cape Francais stalkgrass
PHGL8 Pharus glaber Kunth FL (E)
PHPOP Phaseolus polystachios (L.) Britton, Sterns & Poggenb. var. polystachios thicket bean
PHPOA Phaseolus polystachios (L.) Britton, Sterns & Poggenb. var. aquilonius Fernald CT (SC)
PHCO24 Phegopteris connectilis (Michx.) Watt long beechfern NY (EV), RI (T)
THPH Thelypteris phegopteris (L.) Slosson IL (E), IA (E), TN (SC)
PHHE11 Phegopteris hexagonoptera (Michx.) Fée broad beechfern ME (SC), MN (T), NY (EV)
PHCA47 Phemeranthus calcaricus (Ware) Kiger limestone fameflower
TACA14 Talinum calcaricum Ware KY (E), TN (SC)
PHCA48 Phemeranthus calycinus (Engelm.) Kiger largeflower fameflower
TACA Talinum calycinum Engelm. IL (E)
PHHU3 Phemeranthus humilis (Greene) Kiger Pinos Altos fameflower
TAHU2 Talinum humile Greene AZ (SR)
PHMA29 Phemeranthus marginatus (Greene) Kiger tepic fameflower
TAMA Talinum marginatum Greene AZ (SR)
PHME14 Phemeranthus mengesii (W. Wolf) Kiger Menges' fameflower
TAME Talinum mengesii W. Wolf TN (T)
PHPA29 Phemeranthus parviflorus (Nutt.) Kiger sunbright
TAPA3 Talinum parviflorum Nutt. IA (T)
PHRU8 Phemeranthus rugospermus (Holz.) Kiger prairie fameflower
TARU Talinum rugospermum Holz. IN (T), IA (E), MN (E)
PHSE20 Phemeranthus sediformis (Poelln.) Kiger Okanogan fameflower
TASE Talinum sediforme Poelln. WA (S)
PHTE18 Phemeranthus teretifolius (Pursh) Raf. quill fameflower
TATE Talinum teretifolium Pursh KY (T), MD (T), PA (T), TN (T)
PHVA8 Phemeranthus validulus (Greene) Kiger Tusayan fameflower
TAVA Talinum validulum Greene AZ (SR)
PHIN5 Philadelphus inodorus L. scentless mock orange KY (T)
PHPU4 Philadelphus pubescens Loisel. hoary mock orange KY (E)
PHAL2 Phleum alpinum L. alpine timothy ME (T), MI (PREX), NH (T)
PHAM7 Phlox amplifolia Britton largeleaf phlox IN (T)
PHBI3 Phlox bifida Beck cleft phlox MI (T)
PHBIB Phlox bifida Beck ssp. bifida cleft phlox KY (T)
PHBIS Phlox bifida Beck ssp. stellaria (A. Gray) Wherry cleft phlox IN (E), KY (T), TN (T)
PHCA19 Phlox carolina L. thickleaf phlox MD (E, X)
PHDI5 Phlox divaricata L. wild blue phlox NJ (E)
PHGL4 Phlox glaberrima L. smooth phlox MD (E, X)
PHGLI Phlox glaberrima L. ssp. interior (Wherry) Wherry smooth phlox WI (E)
PHHI7 Phlox hirsuta E.E. Nelson Yreka phlox E CA (E)
PHLA13 Phlox latifolia Michx. wideflower phlox MD (E, X), OH (E)
PHOV Phlox ovata auct. non L. IN (E), PA (E)
PHMA4 Phlox maculata L. wild sweetwilliam MI (T), NY (E)
PHNIT Phlox nivalis Lodd. ex Sweet ssp. texensis Lundell Texan phlox E TX (E)
PHPI Phlox pilosa L. downy phlox MD (E), NJ (E), NY (E), PA (E)
PHPIO2 Phlox pilosa L. ssp. ozarkana (Wherry) Wherry Ozark phlox TN (SC)
PHPIS Phlox pilosa L. ssp. sangamonensis Levin & D.M. Sm. downy phlox IL (E)
PHSU3 Phlox subulata L. moss phlox TN (T)
PHSUB2 Phlox subulata L. ssp. brittonii (Small) Wherry Britton's phlox PA (E)
PHTE7 Phoebanthus tenuifolius (Torr. & A. Gray) S.F. Blake pineland false sunflower FL (T)
PHAR5 Pholisma arenarium Nutt. ex Hook. desert christmas tree AZ (HS)
PHSO Pholisma sonorae (Torr. ex A. Gray) Yatsk. sandfood AZ (HS)
PHLE14 Phoradendron leucarpum (Raf.) Reveal & M.C. Johnst. oak mistletoe
PHSE9 Phoradendron serotinum (Raf.) M.C. Johnst. PA (X)
PHRU Phoradendron rubrum (L.) Griseb. mahogany mistletoe FL (E)
PHME13 Photinia melanocarpa (Michx.) K.R. Robertson & Phipps black chokeberry
ARME6 Aronia melanocarpa (Michx.) Elliot IA (E)
PHLE5 Phryma leptostachya L. American lopseed ME (PX)
PHLA3 Phyla lanceolata (Michx.) Greene lanceleaf fogfruit NJ (E), PA (R)
PHST8 Phyla stoechadifolia (L.) Small southern fogfruit FL (E)
PHCA9 Phyllanthus caroliniensis Walter Carolina leaf-flower OH (E), PA (E)
PHLI13 Phyllanthus liebmannianus Müll. Arg. Florida leaf-flower FL (E)
PHCA10 Phyllodoce caerulea (L.) Bab. blue mountainheath ME (T), NH (T)
PHGLL2 Phyllostegia glabra (Gaudich.) Benth. var. lanaiensis Sherff ulihi phyllostegia E
PHHI5 Phyllostegia hirsuta Benth. Molokai phyllostegia E
PHKA6 Phyllostegia kaalaensis H. St. John Kaala phyllostegia E
PHKN Phyllostegia knudsenii Hillebr. Waimea phyllostegia E
PHMA12 Phyllostegia mannii Sherff Mann's phyllostegia E
PHMO7 Phyllostegia mollis Benth. Waianae Range phyllostegia E
PHPA14 Phyllostegia parviflora (Gaudich.) Benth. smallflower phyllostegia E
PHRA6 Phyllostegia racemosa Benth. kiponapona E
PHVE8 Phyllostegia velutina (Sherff) H. St. John velvet phyllostegia E
PHWA Phyllostegia waimeae Wawra Kauai phyllostegia E
PHWA3 Phyllostegia warshaueri H. St. John Laupahoehoe phyllostegia E
PHWA2 Phyllostegia wawrana Sherff fuzzystem phyllostegia E
PHPUI Physalis pubescens L. var. integrifolia (Dunal) Waterf. husk tomato NY (E)
PHPR7 Physalis pruinosa auct. non L. ME (PX)
PHVI5 Physalis virginiana Mill. Virginia groundcherry NY (E), OH (E), PA (E)
PHDID Physaria didymocarpa (Hook.) A. Gray var. didymocarpa common twinpod WA (S)
PHOB Physaria obcordata Rollins Dudley Bluffs twinpod T
PHOP Physocarpus opulifolius (L.) Maxim., orth. cons. common ninebark FL (E)
PHOPI Physocarpus opulifolius (L.) Maxim. var. intermedius (Rydb.) B.L. Rob. Atlantic ninebark NY (E)
PHGO2 Physostegia godfreyi Cantino Godfrey's false dragonhead FL (T)
PHLE9 Physostegia leptophylla Small slenderleaf false dragonhead GA (T)
PHVI8 Physostegia virginiana (L.) Benth. obedient plant RI (SC), VT (T)
PIEN Picea engelmannii Parry ex Engelm. Engelmann spruce NV (CY)
PIMA Picea mariana (Mill.) Britton, Sterns & Poggenb. black spruce RI (SC)
PIRU Picea rubens Sarg. red spruce CT (SC), NJ (E)
PIPE Picramnia pentandra Sw. Florida bitterbush FL (E)
PIFL Pieris floribunda (Pursh) Benth. & Hook. f. mountain fetterbush TN (T)
PIPO4 Pilosocereus polygonus (Lam.) Byles & Rowley Deering's tree cactus
CERO3 Cereus robinii (Lem.) L.D. Benson FL (E)
PIBA4 Pilosocereus bahamensis (Britton) Byles & Rowley FL (E)
PIRO5 Pilosocereus robinii (Lem.) Byles & Rowley E
PIAM Pilularia americana A. Braun American pillwort TN (SC), WA (S)
PIBR6 Pinckneya bracteata (Bartram) Raf. fevertree FL (T)
PICA7 Pinguicula caerulea Walter blueflower butterwort FL (T)
PIIO Pinguicula ionantha Godfrey violet butterwort T FL (E)
PILU2 Pinguicula lutea Walter yellow butterwort FL (T)
PIPL Pinguicula planifolia Chapm. Chapman's butterwort FL (T)
PIPR Pinguicula primuliflora Alph. Wood & Godfrey southern butterwort FL (E), GA (T)
PIVU Pinguicula vulgaris L. common butterwort ME (T), NH (E), NY (T), WI (E)
PIAL Pinus albicaulis Engelm. whitebark pine NV (CY)
PIAR Pinus aristata Engelm. bristlecone pine AZ (SR)
PIBA2 Pinus banksiana Lamb. jack pine IL (E), IN (R), NH (T), NY (R), VT (T)
PICOM Pinus contorta Douglas ex Loudon var. murrayana (Balf.) Engelm. Sierra lodgepole pine NV (CY)
PIEC2 Pinus echinata Mill. shortleaf pine IL (E)
PIFL2 Pinus flexilis James limber pine NV (CY)
PIJE Pinus jeffreyi Balf. Jeffrey pine NV (CY)
PILA Pinus lambertiana Douglas sugar pine NV (CY)
PILO Pinus longaeva D.K. Bailey Great Basin bristlecone pine NV (CY)
PIMO Pinus monophylla Torr. & Frém. singleleaf pinyon NV (CY)
PIMO3 Pinus monticola Douglas ex D. Don western white pine NV (CY)
PIPOP Pinus ponderosa C. Lawson var. ponderosa ponderosa pine NV (CY)
PIPOS Pinus ponderosa C. Lawson var. scopulorum Engelm. ponderosa pine NV (CY)
PIPOW2 Pinus ponderosa Lawson & C. Lawson var. washoensis (H. Mason & Stockw.) J.R. Haller & Vivrette Washoe pine
PIWA Pinus washoensis H. Mason & Stockw. Washoe pine NV (CY)
PIPU5 Pinus pungens Lamb. Table Mountain pine NJ (E)
PIRE Pinus resinosa Aiton red pine CT (E), IL (E), NJ (E)
PIST Pinus strobus L. eastern white pine IN (R)
PIVI2 Pinus virginiana Mill. Virginia pine NY (E)
PIYA Piperia yadonii R. Morgan & Ackerman Yadon's piperia E
PICA17 Piptatherum canadense (Poir.) Dorn Canadian ricegrass
ORCA5 Oryzopsis canadensis (Poir.) Torr. ME (SC), MI (T), NH (E), NY (E)
PIPU7 Piptatherum pungens (Torr. ex Spreng.) Dorn mountain ricegrass
ORPU4 Oryzopsis pungens (Torr. ex Spreng.) Hitchc. CT (SC), IN (X), IA (E), NJ (E), PA (E), RI (SC), VT (T)
PIRA5 Piptatherum racemosum (Sm.) Barkworth blackseed ricegrass
ORRA2 Oryzopsis racemosa (Sm.) Ricker ex Hitchc. IN (T), MD (T), OH (T)
PIAV Piptochaetium avenaceum (L.) Parodi blackseed speargrass OH (PRX), PA (X)
STAV Stipa avenacea L. IN (T)
PIRO3 Pisonia rotundata Griseb. smooth devil's-claws FL (E)
PIKE Pithecellobium keyense Britton ex Britton & Rose Florida Keys blackbead FL (T)
PIFA Pityopsis falcata (Pursh) Nutt. sickleleaf silkgrass
CHFA5 Chrysopsis falcata (Pursh) Elliot CT (E), RI (SC)
PIFL5 Pityopsis flexuosa (Nash) Small zigzag silkgrass FL (E)
PIGRG Pityopsis graminifolia (Michx.) Nutt. var. graminifolia narrowleaf silkgrass
CHGR14 Chrysopsis graminifolia (Michx.) Elliot OH (E)
PIPI4 Pityopsis pinifolia (Elliot) Nutt. Taylor County goldaster GA (T)
PIRU3 Pityopsis ruthii (Small) Small Ruth's goldaster E TN (E)
PICA9 Pityopus californica (Eastw.) Copeland f. California pinefoot WA (S)
PLHI6 Plagiobothrys hirtus (Greene) I.M. Johnst. rough popcornflower E OR (E)
PLLA3 Plagiobothrys lamprocarpus (Piper) I.M. Johnst. shinyfruit popcornflower OR (E)
PLST2 Plagiobothrys strictus (Greene) I.M. Johnst. Calistoga popcornflower E CA (T)
PLTOD Plagiobothrys torreyi (A. Gray) A. Gray var. diffusus (Greene) I.M. Johnst. Torrey's popcornflower
PLDI Plagiobothrys diffusus (Greene) I.M. Johnst. CA (E)
PLZI Plagiobryum zieri (Hedw.) Lindb. plagiobryum moss VT (E)
PLCA18 Plagiochila caduciloba H.L. Blomq. NC (E)
PLCO22 Plagiochila corniculata (Dumort.) Dumort. TN (SC)
PLCA11 Plagiomnium carolinianum (L.E. Anderson) T. Kop. Carolina plagiomnium moss
MNCA Mnium carolinianum L.E. Anderson TN (SC)
PLLA9 Plagiothecium latebricola Schimp. plagiothecium moss OH (E)
PLAQ Planera aquatica J.F. Gmel. planertree IL (T)
PLCO2 Plantago cordata Lam. heartleaf plantain AR (T), IL (E), IN (E), KY (H), MD (E, X), MI (E), NY (T), NC (E), OH (T), TN (E), WI (E)
PLEL Plantago elongata Pursh prairie plantain MN (T)
PLHA2 Plantago hawaiensis (A. Gray) Pilg. Hawai'i plantain E
PLMA Plantago macrocarpa Cham. & Schltdl. seashore plantain WA (S)
PLMAJ Plantago maritima L. var. juncoides (Lam.) A. Gray goose tongue
PLMAJ2 Plantago maritima L. ssp. juncoides (Lam.) Hultén NY (T)
PLPA2 Plantago patagonica Jacq. woolly plantain OH (E)
PLPR Plantago princeps Cham. & Schltdl. ale E
PLPU Plantago pusilla Nutt. dwarf plantain MD (E, X), NJ (E)
PLSP Plantago sparsiflora Michx. pineland plantain NC (E)
PLVI Plantago virginica L. Virginia plantain CT (SC)
PLAQ2 Platanthera aquilonis Sheviak northern green orchid NY (EV)
PLBL Platanthera blephariglottis (Willd.) Lindl. white fringed orchid CT (E), FL (T), MD (T), NY (EV), OH (E), RI (T)
PLCH3 Platanthera chorisiana (Cham.) Rchb. Chimissso's orchid WA (T)
PLCI2 Platanthera ciliaris (L.) Lindl. yellow fringed orchid CT (T), FL (T), IL (E), IN (E), MD (T), MI (T), NY (E), OH (T), PA (T), RI (E)
PLCL Platanthera clavellata (Michx.) Luer small green wood orchid FL (E), IL (E), IN (WL), NY (EV)
PLCR Platanthera cristata (Michx.) Lindl. crested yellow orchid FL (T), KY (T), MD (T), MA (E), NY (E), PA (X)
PLDI3 Platanthera dilatata (Pursh) Lindl. ex Beck scentbottle CT (SC), IN (E), MA (T), NY (EV), PA (E)
PLFL Platanthera flava (L.) Lindl. palegreen orchid AR (T), CT (SC), FL (T), IA (E), ME (SC), NY (EV), VT (T)
PLFLF Platanthera flava (L.) Lindl. var. flava palegreen orchid IL (E), IN (E), NJ (E), TN (SC)
PLFLH Platanthera flava (L.) Lindl. var. herbiola (R. Br.) Luer palegreen orchid IL (E), MA (T), MN (E), NH (T), RI (E), TN (T), WI (T)
PLGR6 Platanthera gracilis Lindl. lax-flowered green orchid
PLHYG Platanthera hyperborea (L.) Lindl. var. gracilis (Lindl.) Luer AZ (SR)
PLGR2 Platanthera grandiflora (Bigelow) Lindl. greater purple fringed orchid MD (T), NY (EV), OH (PRX), TN (E)
PLHO4 Platanthera holochila (Hillebr.) Kraenzlin Hawai'i bog orchid E
PLHO3 Platanthera hookeri (Torr. ex A. Gray) Lindl. Hooker's orchid CT (SC), IN (X), IA (T), NJ (E), NY (E), OH (PRX), PA (E), RI (H), VT (T)
PLHU2 Platanthera huronensis (Nutt.) Lindl. Huron green orchid NY (EV)
PLHY2 Platanthera hyperborea (L.) Lindl. northern green orchid IN (T), IA (T), OH (PRX), PA (E), RI (T)
PLHYH2 Platanthera hyperborea (L.) Lindl. var. hyperborea AZ (SR)
PLIN5 Platanthera integra (Nutt.) A. Gray ex Beck yellow fringeless orchid FL (E), NJ (E), NC (T), TN (E)
PLIN6 Platanthera integrilabia (Correll) Luer white fringeless orchid GA (T), KY (T), NC (E), TN (E)
PLLA2 Platanthera lacera (Michx.) G. Don green fringed orchid NY (EV)
PLLE2 Platanthera leucophaea (Nutt.) Lindl. prairie white fringed orchid T IL (E), IN (X), IA (E), ME (E), MI (E), MO (E), NY (E), OH (T), PA (X), WI (E)
PLLI3 Platanthera limosa Lindl. Thurber's bog orchid AZ (SR)
PLMA9 Platanthera macrophylla (Goldie) P.M. Brown greater roundleaved orchid
PLORM Platanthera orbiculata (Pursh) Lindl. var. macrophylla (Goldie) Luer RI (T)
PLNI Platanthera nivea (Nutt.) Luer snowy orchid AR (E), FL (T), NJ (E), NC (T), TN (E)
PLOB Platanthera obtusata (Banks ex Pursh) Lindl. bluntleaved orchid NY (EV), WA (S)
PLOR4 Platanthera orbiculata (Pursh) Lindl. lesser roundleaved orchid CT (SC), IN (X), NJ (E), NY (EV), RI (T), TN (T)
PLPE Platanthera peramoena (A. Gray) A. Gray purple fringeless orchid AR (T), MD (T), NJ (E), PA (T)
PLPR4 Platanthera praeclara Sheviak & Bowles Great Plains white fringed orchid T IA (T), MN (E), MO (E), NE (T)
PLPS2 Platanthera psycodes (L.) Lindl. lesser purple fringed orchid IL (E), IN (R), IA (T), KY (E), MD (E, X), NY (EV), OH (E), RI (SC), TN (T)
PLSP2 Platanthera sparsiflora (S. Watson) Schltr. sparse-flowered bog orchid WA (S)
PLSPE Platanthera sparsiflora (S. Watson) Schltr. var. ensifolia (Rydb.) Luer sparse-flowered bog orchid AZ (SR)
PLSPS Platanthera sparsiflora (S. Watson) Schltr. var. sparsiflora sparse-flowered bog orchid AZ (SR)
PLST4 Platanthera stricta Lindl. slender bog orchid AZ (SR)
PLOC Platanus occidentalis L. American sycamore ME (PX)
PLMA6 Pleodendron macranthum (Baill.) v. Tiegh. chupa gallo E
PLHA4 Pleomele hawaiiensis O. Deg. & I. Deg. Hawai'i hala pepe E
PLAS2 Pleopeltis astrolepis (Liebm.) Fourn. starscale fern FL (E)
PLPOP Pleopeltis polypodioides (L.) Andrews & Windham ssp. polypodioides resurrection fern
POPO6 Polypodium polypodioides (L.) Watt IN (R), OH (T)
PLHO2 Pleuropogon hooverianus (L.D. Benson) J.T. Howell North Coast semaphoregrass CA (R)
PLOR3 Pleuropogon oregonus Chase Oregon semaphoregrass OR (T)
PLGE Pleurothallis gelida Lindl. flor de llanten FL (E)
PLCA7 Pluchea camphorata (L.) DC. camphor pluchea MD (E), OH (E)
PLFO Pluchea foetida (L.) DC. stinking camphorweed NJ (E)
PLOD Pluchea odorata (L.) Cass. sweetscent PA (E)
POAL2 Poa alpina L. alpine bluegrass MI (T)
POAL3 Poa alsodes A. Gray grove bluegrass IL (E), IN (R)
POAT Poa atropurpurea Scribn. San Bernardino bluegrass E
POAU Poa autumnalis Muhl. ex Elliot autumn bluegrass NJ (E), PA (E)
POCU4 Poa cuspidata Nutt. early bluegrass IN (X), NY (E)
POGL Poa glauca Vahl glaucous bluegrass ME (SC), NH (T), NY (E)
POLAF Poa laxa Haenke ssp. fernaldiana (Nannf.) Hyl. Fernald's bluegrass
POFE2 Poa fernaldiana Nannf. ME (E), NH (E), NY (E)
POLA3 Poa laxiflora Buckley looseflower bluegrass WA (T)
POMA5 Poa mannii Munro ex Hillebr. Olokele Gulch bluegrass E
PONA Poa napensis Beetle Napa bluegrass E CA (E)
PONEI2 Poa nemoralis L. ssp. interior (Rydb.) W.A. Weber inland bluegrass
POIN Poa interior Rydb. NY (E)
PONE2 Poa nervosa (Hook.) Vasey Wheeler bluegrass WA (S)
POPA Poa paludigena Fernald & Wiegand bog bluegrass IN (WL), MI (T), MN (T), NY (E), NC (E), OH (T), PA (T), WI (T)
POPA2 Poa palustris L. fowl bluegrass TN (E)
POPRA6 Poa pratensis L. ssp. alpigena (Fr. ex Blytt) Hiitonen Kentucky bluegrass NH (E)
POSA Poa saltuensis Fernald & Wiegand oldpasture bluegrass KY (E), MD (E), NJ (E), OH (E), TN (SC)
POLA2 Poa languida Hitchc. IL (E), MA (E), PA (T), RI (SC), TN (T)
POSA2 Poa sandvicensis (Reichart) Hitchc. Hawai'i bluegrass E
POSE Poa secunda J. Presl Sandberg bluegrass
POCA Poa canbyi (Scribn.) Howell MI (E)
POSI Poa siphonoglossa Hack. Kauai bluegrass E
POSY Poa sylvestris A. Gray woodland bluegrass NY (E)
POUN Poa unilateralis Scribn. San Francisco bluegrass WA (T)
POWO Poa wolfii Scribn. Wolf's bluegrass IL (E), IN (R), OH (E)
POPE Podophyllum peltatum L. mayapple FL (E)
POCE3 Podostemum ceratophyllum Michx. hornleaf riverweed CT (SC), KY (SC), ME (SC), MA (SC), NY (T), OH (E), RI (H)
POAB2 Pogogyne abramsii J.T. Howell San Diego mesamint E CA (E)
POCL2 Pogogyne clareana J.T. Howell Santa Lucia mint CA (E)
PONU Pogogyne nudiuscula A. Gray Otay mesamint E CA (E)
POOP Pogonia ophioglossoides (L.) Ker Gawl. snakemouth orchid AR (T), FL (T), IL (E), KY (E), NY (EV), OH (T), TN (E)
PODO3 Polanisia dodecandra (L.) DC. redwhisker clammyweed CT (SC), MD (E)
POJA3 Polanisia jamesii (Torr. & A. Gray) Iltis James' clammyweed IL (E), IA (E)
CRJA5 Cristatella jamesii Torr. & A. Gray MN (E)
POCA4 Polemonium carneum A. Gray royal Jacob's-ladder WA (T)
POOCL Polemonium occidentale Greene ssp. lacustre Wherry western polemonium MN (E), WI (E)
POPE14 Polemonium pectinatum Greene Washington Jacob's-ladder WA (T)
PORE2 Polemonium reptans L. Greek valerian MI (T), NJ (E)
POVA5 Polemonium vanbruntiae Britton Vanbrunt's polemonium ME (E), MD (T), NY (R), PA (E), VT (T)
POVI Polemonium viscosum Nutt. sticky polemonium WA (S)
POWI Polyctenium williamsiae Rollins Washoe combleaf NV (FP)
POBO4 Polygala boykinii Nutt. Boykin's milkwort TN (SC)
POCR Polygala cruciata L. drumheads CT (SC), IA (E), KY (E), ME (PX), MD (T), MN (E), OH (E), PA (E), RI (SC)
POCU5 Polygala curtissii A. Gray Curtiss' milkwort OH (E), PA (E)
POIN4 Polygala incarnata L. procession flower IL (E), IN (E), IA (T), MI (PREX), NJ (E), OH (T), PA (E), WI (E)
POLE8 Polygala lewtonii Small Lewton's milkwort E FL (E)
POLU Polygala lutea L. orange milkwort NY (E), PA (X)
POMA8 Polygala mariana Mill. Maryland milkwort TN (SC)
PONA2 Polygala nana (Michx.) DC. candyroot TN (E)
PONU2 Polygala nuttallii Torr. & A. Gray Nuttall's milkwort CT (E), KY (H), TN (E)
POPA5 Polygala paucifolia Willd. gaywings IN (E), KY (E), OH (E)
POPO Polygala polygama Walter racemed milkwort IA (E), KY (T), MD (T), OH (T), PA (E)
PORIM Polygala rimulicola Steyerm. var. mescalerorum T. Wendt & T.K. Todsen Mescalero milkwort NM (E)
POSE3 Polygala senega L. Seneca snakeroot CT (E), ME (E), MD (T), NJ (E)
POSM3 Polygala smallii R.R. Sm. & Ward tiny milkwort E FL (E)
POVE Polygala verticillata L. whorled milkwort RI (SC)
POBIC Polygonatum biflorum (Walter) Elliot var. commutatum (Schult. & Schult. f.) Morong smooth Solomon's seal NH (E)
POBIM Polygonatum biflorum (Walter) Elliot var. melleum (Farw.) R. Ownbey smooth Solomon's seal MI (PREX)
POCO6 Polygonatum cobrense (Woot. & Standl.) R.R. Gates McKittrick's Solomon's seal AZ (SR)
POPU4 Polygonatum pubescens (Willd.) Pursh hairy Solomon's seal IL (E)
POAM3 Polygonella americana (Fisch. & C.A. Mey.) Small southern jointweed TN (E)
POAR4 Polygonella articulata (L.) Meisn. coastal jointweed IN (R), IA (E), PA (E)
POBA5 Polygonella basiramia (Small) G.L. Nesom & V.M. Bates Florida jointweed E FL (E)
POMA14 Polygonella macrophylla Small largeleaf jointweed FL (T)
POMY2 Polygonella myriophylla (Small) Horton Small's jointweed E FL (E)
POAR6 Polygonum arifolium L. halberdleaf tearthumb IL (E), TN (T)
POBU2 Polygonum buxiforme Small box knotweed NY (E)
POCA8 Polygonum careyi Olney Carey's smartweed IL (E), IN (T), MI (T), NY (T), OH (PRX), PA (E)
POCI Polygonum cilinode Michx. fringed black bindweed IN (E), OH (E), TN (T)
PODO4 Polygonum douglasii Greene Douglas' knotweed IA (E), ME (T), NH (T), NY (T), VT (E)
PODOA2 Polygonum douglasii Greene ssp. austiniae (Greene) A.E. Murray Austin knotweed
POAU2 Polygonum austiniae Greene WA (S)
POER2 Polygonum erectum L. erect knotweed NH (E), NY (E)
POGL10 Polygonum glabrum Willd. denseflower knotweed
PODE2 Polygonum densiflorum Meisn. MD (E), NJ (E)
POGL7 Polygonum glaucum Nutt. seaside knotweed CT (SC), MD (E), MA (SC), NJ (E), NY (R), RI (T)
POHI14 Polygonum hickmanii H. Hinds & R. Morgan Hickman's knotweed E
POHY2 Polygonum hydropiperoides Michx. swamp smartweed
POHYO Polygonum hydropiperoides Michx. var. opelousanum (Riddell ex Small) Riddell ex W. Stone IN (T), NY (T)
POME4 Polygonum meisnerianum Cham. & Schltdl. branched tearthumb FL (E)
POPE3 Polygonum persicaria L. spotted ladysthumb
POPU11 Polygonum puritanorum Fernald MA (SC)
PORA3 Polygonum ramosissimum Michx. bushy knotweed MD (E, X), PA (X)
PORAP Polygonum ramosissimum Michx. var. prolificum Small bushy knotweed
POPR10 Polygonum prolificum (Small) B.L. Rob. NH (T)
PORAR Polygonum ramosissimum Michx. var. ramosissimum bushy knotweed
POEX4 Polygonum exsertum auct. non Small. p.p. NH (T)
PORO Polygonum robustius (Small) Fernald stout smartweed MD (E, X), NH (T), OH (T)
POSE6 Polygonum setaceum Baldw. bog smartweed
PESE15 Persicaria setacea (Baldw.) Small MA (T)
POHYS2 Polygonum hydropiperoides Michx. var. setaceum (Baldw.) Gleason IN (E), RI (H)
POSEI Polygonum setaceum Baldw. var. interjectum Fernald NY (E), OH (E), PA (E)
POTE2 Polygonum tenue Michx. pleatleaf knotweed ME (PX), NH (E), NY (R)
POVI3 Polygonum viviparum L. alpine bistort ME (E), MI (T), NH (T)
POCA11 Polymnia canadensis L. whiteflower leafcup CT (E), VT (E)
POLA8 Polymnia laevigata Beadle Tennessee leafcup FL (E), KY (E)
POVI7 Polypodium virginianum L. rock polypody NY (EV)
POCO27 Polystachya concreta (Jacq.) Garay & H.R. Sweet greater yellowspike orchid FL (E)
POAC4 Polystichum acrostichoides (Michx.) Schott Christmas fern MN (T), NY (EV)
POAL6 Polystichum aleuticum C. Chr. Aleutian holly fern E
POBR4 Polystichum braunii (Spenner) Fée Braun's hollyfern MA (E), MN (E), NY (EV), PA (E), WI (T)
POCA27 Polystichum calderonense Proctor Monte Guilarte hollyfern E PR (E)
POCA25 Polystichum californicum (D.C. Eaton) Diels California swordfern WA (S)
POLO4 Polystichum lonchitis (L.) Roth northern hollyfern NY (E)
PONU4 Polytaenia nuttallii DC. Nuttall's prairie parsley IN (E), MI (PREX), TN (T), WI (T)
POPA29 Polytrichum pallidisetum Funck polytrichum moss KY (T)
POPI10 Polytrichum piliferum Hedw. polytrichum moss KY (E)
POST70 Polytrichum strictum Brid. polytrichum moss KY (E)
POCO14 Pontederia cordata L. pickerelweed KY (T)
POBR9 Ponthieva brittoniae Ames Britton's shadow witch FL (E)
PORA4 Ponthieva racemosa (Walter) C. Mohr hairy shadow witch TN (E)
POBA2 Populus balsamifera L. balsam poplar IL (E), IN (X), OH (E), PA (E)
POGR4 Populus grandidentata Michx. bigtooth aspen TN (SC)
POHE4 Populus heterophylla L. swamp cottonwood CT (E), MA (E), MI (E), NY (T), PA (X), RI (T)
POWA4 Porella wataugensis (Sull.) Underw. Watauga porella TN (T)
POSC9 Portulaca sclerocarpa A. Gray 'ihi makole E
POSM Portulaca smallii P. Wilson Small's purslane NC (T)
POAL8 Potamogeton alpinus Balbis alpine pondweed NH (T), NJ (E), NY (T), PA (X)
POAM5 Potamogeton amplifolius Tuck. largeleaf pondweed MD (E, X), TN (T)
POBI9 Potamogeton bicupulatus Fernald snailseed pondweed IN (X), MI (T), MN (E)
POCL Potamogeton clystocarpus Fernald little aguja pondweed E TX (E)
POCO12 Potamogeton confervoides Rchb. Tuckerman's pondweed CT (SC), ME (SC), MA (T), NY (T), PA (T), RI (H), WI (T)
PODI Potamogeton diversifolius Raf. waterthread pondweed CT (SC), MA (E), MN (E), NY (E)
POEP2 Potamogeton epihydrus Raf. ribbonleaf pondweed IN (E), TN (SC)
POFL5 Potamogeton floridanus Small Florida pondweed FL (E)
POFO3 Potamogeton foliosus Raf. leafy pondweed MD (E), NH (E)
POFR3 Potamogeton friesii Rupr. Fries' pondweed CT (SC), IN (E), ME (E), MA (E), OH (E), PA (E)
POGR8 Potamogeton gramineus L. variableleaf pondweed IL (T), OH (E), PA (E)
POHI4 Potamogeton hillii Morong Hill's pondweed CT (E), MA (SC), MI (T), NY (T), OH (E), PA (E)
POIL Potamogeton illinoensis Morong Illinois pondweed KY (SC), NJ (E), PA (R)
POOA Potamogeton oakesianus J.W. Robbins Oakes' pondweed IN (E), PA (E)
POOB2 Potamogeton obtusifolius Mert. & W.D.J. Koch bluntleaf pondweed NJ (E), PA (E), WA (S)
POOG Potamogeton ogdenii Hellquist & Hilton Ogden's pondweed MA (E), NY (E)
POPE7 Potamogeton perfoliatus L. claspingleaf pondweed OH (PRX)
POPR5 Potamogeton praelongus Wulfen whitestem pondweed IL (E), IN (E), NJ (E), OH (E), PA (E)
POPU6 Potamogeton pulcher Tuck. spotted pondweed IL (E), IN (E), KY (T), ME (T), MI (T), NY (T), OH (T), PA (E), WI (E)
POPU7 Potamogeton pusillus L. small pondweed IN (R)
POPUG4 Potamogeton pusillus L. ssp. gemmiparus (J.W. Robbins) Haynes & C.B. Hellquist small pondweed
POPUG Potamogeton pusillus L. var. gemmiparus J.W. Robbins CT (SC), NH (T), RI (SC)
PORI2 Potamogeton richardsonii (Benn.) Rydb. Richardson's pondweed IN (T), MD (E, X), PA (T)
PORO2 Potamogeton robbinsii Oakes Robbins' pondweed IL (E), IN (T), MD (E, X), NJ (E), OH (E), PA (R)
POSP3 Potamogeton spirillus Tuck. spiral pondweed OH (PRX)
POST2 Potamogeton strictifolius Benn. narrowleaf pondweed CT (SC), IL (E), IN (E), ME (PX), MA (E), NY (E), OH (PRX), PA (E)
POTE4 Potamogeton tennesseensis Fernald Tennessee pondweed OH (E), PA (E), TN (T)
POVA3 Potamogeton vaseyi J.W. Robbins Vasey's pondweed CT (SC), IN (E), ME (T), MA (E), MI (T), NH (T), OH (PRX), PA (E)
POZO Potamogeton zosteriformis Fernald flatstem pondweed MD (E), NH (T), NJ (E), PA (R)
POAR7 Potentilla arguta Pursh tall cinquefoil AR (T), CT (SC), OH (E)
POBI10 Potentilla bipinnatifida Douglas ex Hook. tansy cinquefoil
POPEB3 Potentilla pensylvanica L. var. bipinnatifida (Douglas ex Hook.) Torr. & A. Gray VT (E)
PODIP Potentilla diversifolia Lehm. var. perdissecta (Rydb.) C.L. Hitchc. mountainmeadow cinquefoil WA (S)
PODRB2 Potentilla drummondii Lehm. ssp. breweri (S. Watson) Ertter Drummond's cinquefoil
POBR6 Potentilla breweri S. Watson WA (S)
POHI5 Potentilla hickmanii Eastw. Hickman's cinquefoil E CA (E)
PONI2 Potentilla nivea L. snow cinquefoil WA (S)
PONIP Potentilla nivea L. var. pentaphylla Lehm. fiveleaf cinquefoil
POQU Potentilla quinquefolia (Rydb.) Rydb. WA (S)
POPA15 Potentilla paradoxa Nutt. Paradox cinquefoil MI (T), NY (E), OH (T), PA (E)
POPE8 Potentilla pensylvanica L. Pennsylvania cinquefoil IA (T), MI (T)
PORI3 Potentilla rivalis Nutt. brook cinquefoil
POMI6 Potentilla millegrana Engelm. ex Lehm. IL (E)
PORO3 Potentilla robbinsiana Oakes ex Rydb. dwarf mountain cinquefoil NH (E)
PRAL2 Prenanthes alba L. white rattlesnakeroot KY (E)
PRAS Prenanthes aspera Michx. rough rattlesnakeroot IN (R), KY (E), OH (E), TN (E), WI (E)
PRAU Prenanthes autumnalis Walter slender rattlesnakeroot MD (E)
PRBA Prenanthes barbata (Torr. & A. Gray) Milstead barbed rattlesnakeroot KY (E), TN (SC)
PRBO2 Prenanthes boottii (DC.) A. Gray alpine rattlesnakeroot ME (E), NH (T), NY (E), VT (E)
PRCR Prenanthes crepidinea Michx. nodding rattlesnakeroot IN (R), KY (T), NY (E), OH (T), PA (E), TN (E), WI (E)
PRMA8 Prenanthes ×mainensis A. Gray (pro sp.) [racemosa × trifoliolata] ME (PX)
PRNA Prenanthes nana (Bigelow) Torr. dwarf rattlesnakeroot ME (E), NY (E)
PRRA Prenanthes racemosa Michx. purple rattlesnakeroot ME (SC), NJ (E), PA (X)
PRRO2 Prenanthes roanensis (Chickering) Chickering Roan Mountain rattlesnakeroot TN (T)
PRSE Prenanthes serpentaria Pursh cankerweed RI (SC)
NASE3 Nabalus serpentarius (Pursh) Hook. MA (E)
PRTR Prenanthes trifoliolata (Cass.) Fernald gall of the earth OH (E)
PROL Prescotia oligantha (Sw.) Lindl. small Prescott orchid FL (E)
PRCUM Primula cusickiana (A. Gray) A. Gray var. maguirei (L.O. Williams) N.H. Holmgren & S. Kelso Maguire's primrose
PRMA7 Primula maguirei L.O. Williams T
PRLA Primula laurentiana Fernald birdeye primrose ME (SC)
PRMI Primula mistassinica Michx. Mistassini primrose IL (E), ME (SC), NY (T), VT (T)
PRRU Primula rusbyi Greene Rusby's primrose AZ (SR)
PRSP2 Primula specuicola Rydb. cavedwelling primrose AZ (SR)
PRHU Primula hunnewellii Fernald AZ (SR)
PRAF Pritchardia affinis Becc. Hawai'i pritchardia E
PRKA Pritchardia kaalae Rock Waianae Range pritchardia E
PRMU3 Pritchardia munroi Rock Kamalo pritchardia E
PRRE Pritchardia remota Becc. Nihoa pritchardia E
PRREA Pritchardia remota Becc. ssp. aylmer-robinsonii (H. St. John) R.W. Read, ined. Nihoa pritchardia
PRAY Pritchardia aylmer-robinsonii H. St. John E
PRREN Pritchardia remota Becc. ssp. napaliensis (H. St. John) R.W. Read, ined. Nihoa pritchardia
PRNA2 Pritchardia napaliensis H. St. John E
PRSC Pritchardia schattaueri Hodel lands of papa pritchardia E
PRVI2 Pritchardia viscosa Rock stickybud pritchardia E
PRLO Proboscidea louisianica (Mill.) Thell. ram's horn IN (X)
PRHOH Prosartes hookeri Torr. var. hookeri drops-of-gold
DIHO3 Disporum hookeri (Torr.) G. Nicholson MI (E)
PRMA14 Prosartes maculata (Buckley) A. Gray yellow mandarin
DIMA2 Disporum maculatum (Buckley) Britton KY (SC), MI (PREX), OH (T)
PRTR4 Prosartes trachycarpa S. Watson roughfruit fairybells
DITR2 Disporum trachycarpum (S. Watson) Benth. & Hook. f. AZ (SR), MI (T)
DITRS Disporum trachycarpum (S. Watson) Benth. & Hook. f. var. subglabrum E.H. Kelso AZ (SR)
PRPE Proserpinaca pectinata Lam. combleaf mermaidweed ME (SC), MI (E), NH (E), NY (T), PA (X), RI (SC)
PRGLG Prosopis glandulosa Torr. var. glandulosa honey mesquite AZ (SA, HR)
PRGLT Prosopis glandulosa Torr. var. torreyana (L.D. Benson) M.C. Johnst. western honey mesquite AZ (SA, HR)
PRPU Prosopis pubescens Benth. screwbean mesquite AZ (SA, HR)
PRVE Prosopis velutina Woot. velvet mesquite AZ (SA, HR)
PRBOE Prosthechea boothiana (Lindl.) W.E. Higgins var. erythronioides (Small) W.E. Higgins dollar orchid
ENBO Encyclia boothiana auct. non (Lindl.) Dressler FL (E)
PRCOC Prosthechea cochleata (L.) W.E. Higgins var. cochleata clamshell orchid
ENCO3 Encyclia cochleata (L.) Dressler FL (E)
PRPY Prosthechea pygmaea (Hook.) W.E. Higgins dwarf butterfly orchid
ENPY Encyclia pygmaea (Hook.) Dressler FL (E)
PRAL5 Prunus alleghaniensis Porter Allegheny plum CT (SC), MD (T), NJ (E), PA (T)
PRAM Prunus americana Marsh. American plum NH (T), VT (T)
PRAN3 Prunus angustifolia Marsh. Chickasaw plum NJ (E)
PRGE Prunus geniculata Harper scrub plum E FL (E)
PRMA2 Prunus maritima Marsh. beach plum ME (E), MD (E), PA (E)
PRMAG Prunus maritima Marsh. var. gravesii (Small) G.J. Anderson Graves' plum CT (E)
PRME Prunus mexicana S. Watson Mexican plum OH (PRX)
PRMY Prunus myrtifolia (L.) Urb. West Indian cherry FL (T)
PRNI Prunus nigra Aiton Canadian plum IA (E), OH (PRX)
PRPE2 Prunus pensylvanica L. f. pin cherry IN (R)
PRPU3 Prunus pumila L. sandcherry AR (T), PA (R), TN (T)
PRPUD Prunus pumila L. var. depressa (Pursh) Gleason eastern sandcherry MA (T), NY (T)
PRPUP Prunus pumila L. var. pumila Great Lakes sandcherry NY (E), OH (PRX)
PRSU3 Prunus susquehanae hort. ex Willd. Sesquehana sandcherry
PRPUC Prunus pumila L. var. cuneata (Raf.) L.H. Bailey OH (T), RI (SC)
PRVI Prunus virginiana L. chokecherry TN (SC)
PSBA Pseudobahia bahiifolia (Benth.) Rydb. Hartweg's golden sunburst E CA (E)
PSPE Pseudobahia peirsonii Munz San Joaquin adobe sunburst T CA (E)
PSCR60 Pseudocyphellaria crocata (L.) Vain. pseudocyphellaria lichen MN (E)
PSHE4 Pseudognaphalium helleri (Britton) Anderb. Heller's cudweed ME (SC)
PSHEH7 Pseudognaphalium helleri (Britton) Anderb. ssp. helleri Heller's cudweed
GNHE Gnaphalium helleri Britton NJ (E), TN (SC)
PSHEM Pseudognaphalium helleri (Britton) Anderb. ssp. micradenium (Weath.) Kartesz Heller's cudweed
GNHEM Gnaphalium helleri Britton var. micradenium (Weath.) Mahler KY (H), NY (E)
PSMA11 Pseudognaphalium macounii (Greene) Kartesz Macoun's cudweed
GNMA Gnaphalium macounii Greene IN (X), NJ (E)
PSVI4 Pseudognaphalium viscosum (Kunth) W.A. Weber winged cudweed
GNVI Gnaphalium viscosum Kunth OH (PRX)
PSSA Pseudophoenix sargentii H. Wendl. ex Sarg. Florida cherry palm FL (E)
PSSPS Pseudoroegneria spicata (Pursh) Á. Löve ssp. spicata bluebunch wheatgrass
AGSP Agropyron spicatum Pursh MI (PREX)
PSMEG Pseudotsuga menziesii (Mirb.) Franco var. glauca (Beissn.) Franco Rocky Mountain Douglas-fir NV (CY)
PSMEM Pseudotsuga menziesii (Mirb.) Franco var. menziesii Douglas-fir NV (CY)
PSLO2 Psidium longipes (Berg) McVaugh mangroveberry FL (T)
PSNU Psilotum nudum (L.) P. Beauv. whisk fern AZ (HS)
PSTE5 Psoralidium tenuiflorum (Pursh) Rydb. slimflower scurfpea KY (E), MN (E)
PSTE3 Psoralea tenuiflora Pursh IN (X)
PSSP3 Psorothamnus spinosus (A. Gray) Barneby smoketree AZ (SA)
PSLI2 Psychotria ligustrifolia (Northrop) Millsp. Bahama wild coffee FL (E)
PTTR Ptelea trifoliata L. common hoptree NJ (E), NY (E), PA (T)
PTKA Pteralyxia kauaiensis Caum Kauai pteralyxia E
PTAQP Pteridium aquilinum (L.) Kuhn var. pseudocaudatum (Clute) A. Heller western brackenfern IN (X), OH (E)
PTBA Pteris bahamensis (J. Agardh) Fée Bahama brake FL (T)
PTLY Pteris lydgatei (Baker) Christ Lidgate's brake E
PTEC2 Pteroglossaspis ecristata (Fernald) Rolfe giant orchid NC (E)
EUEC Eulophia ecristata (Fernald) Ames FL (T)
PTAN2 Pterospora andromedea Nutt. woodland pinedrops MI (T), NY (E), VT (E), WI (E)
PTCA Ptilimnium capillaceum (Michx.) Raf. herbwilliam KY (T), PA (X), RI (SC)
PTCO Ptilimnium costatum (Elliot) Raf. ribbed mock bishopweed KY (SC)
PTNO Ptilimnium nodosum (Rose) Mathias piedmont mock bishopweed E GA (E), MD (E), NC (E)
PTNU Ptilimnium nuttallii (DC.) Britton laceflower IL (E), KY (E)
PTDR2 Ptychomitrium drummondii (Wilson) Sull. Drummond's ptychomitrium moss OH (E)
PUNU Puccinellia nutkaensis (J. Presl) Fernald & Weath. Nootka alkaligrass WA (S)
PUPA Puccinellia parishii Hitchc. bog alkaligrass AZ (HS), NM (E)
PUPU3 Puccinellia pumila (Vasey) Hitchc. dwarf alkaligrass RI (H)
PUTEA Puccinellia tenella (Lange) Holmb. ex A.E. Porsild ssp. alaskana (Scribn. & Merr.) Tzvelev tundra alkaligrass
PULAA Puccinellia langeana (Berlin) T.J. Sřrensen ex Hultén ssp. alaskana (Scribn. & Merr.) T.J. Sřrensen CT (SC)
PUPAA Puccinellia paupercula (Holmb.) Fernald & Weath. var. alaskana (Scribn. & Merr.) Fernald & Weath. NH (E)
PUPAM Pulsatilla patens (L.) Mill. ssp. multifida (Pritz.) Zamels cutleaf anemone
ANNU5 Anemone nuttalliana DC. WA (S)
PUPE Punctelia perreticulata (Rasanen) G. Wilh. & Ladd punctelia OH (E)
PUST2 Punctelia stictica (Duby) Krog punctelia
PAST16 Parmelia stictica (Duby) Nyl. MN (E)
PUSU2 Purshia ×subintegra (Kearney) Henrickson [pinkavae × stansburiana] E AZ (HS)
PYAL Pycnanthemum albescens Torr. & A. Gray whiteleaf mountainmint IL (E), KY (E)
PYCL Pycnanthemum clinopodioides Torr. & A. Gray basil mountainmint CT (E), MA (E), NJ (E), NY (E)
PYFL2 Pycnanthemum floridanum E. Grant & Epling Florida mountainmint FL (T)
PYIN Pycnanthemum incanum (L.) Michx. hoary mountainmint NH (E), VT (E)
PYMU Pycnanthemum muticum (Michx.) Pers. clustered mountainmint KY (T), ME (PX), MI (T), NY (T)
PYPY Pycnanthemum pycnanthemoides (Leavenworth) Fernald southern mountainmint MD (E, X), PA (E)
PYSE2 Pycnanthemum setosum Nutt. awned mountainmint MD (T)
PYTO Pycnanthemum torrei Benth. Torrey's mountainmint CT (E), IL (E), MD (E), NH (E), NJ (E), NY (E), PA (E), TN (SC)
PYVE Pycnanthemum verticillatum (Michx.) Pers. whorled mountainmint MD (E), TN (PX, E)
PYVEP Pycnanthemum verticillatum (Michx.) Pers. var. pilosum (Nutt.) Cooperr. whorled mountainmint NY (E), OH (E)
PYPI Pycnanthemum pilosum Nutt. MI (T), PA (X)
PYVEV Pycnanthemum verticillatum (Michx.) Pers. var. verticillatum whorled mountainmint NY (T)
PYVI Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald Virginia mountainmint NH (E)
PYAM Pyrola americana Sweet American wintergreen KY (H), TN (E)
PYROA Pyrola rotundifolia L. var. americana (Sweet) Fernald IN (R)
PYAS Pyrola asarifolia Michx. liverleaf wintergreen IN (E), IA (E), ME (SC), NH (E), NY (T), VT (T)
PYASA Pyrola asarifolia Michx. ssp. asarifolia liverleaf wintergreen
PYASP Pyrola asarifolia Michx. var. purpurea (Bunge) Fernald MA (E)
PYCH Pyrola chlorantha Sw. greenflowered wintergreen NJ (E), OH (E), RI (SC)
PYVI3 Pyrola virens Schreb. IN (X), MD (E, X)
PYMI Pyrola minor L. snowline wintergreen ME (SC), NY (E), VT (E), WI (E)
PYLI Pyrrocoma liatriformis Greene smallhead goldenweed
HALI2 Haplopappus liatriformis (Greene) H. St. John WA (T)
PYRA2 Pyrrocoma radiata Nutt. ray goldenweed OR (E)
PYPU Pyrularia pubera Michx. buffalo nut PA (R)
PYBA Pyxidanthera barbulata Michx. flowering pixiemoss NY (E)
PYBR Pyxidanthera brevifolia Wells littleleaf pixiemoss
PYBAB Pyxidanthera barbulata Michx. var. brevifolia (Wells) H.E. Ahles NC (E)
QUAC2 Quercus acerifolia (Palmer) Stoynoff & Hess mapleleaf oak AR (T)
QUAR2 Quercus arkansana Sarg. Arkansas oak FL (T)
QUBI Quercus bicolor Willd. swamp white oak ME (T)
QUCO2 Quercus coccinea Münchh. scarlet oak ME (E)
QUFA Quercus falcata Michx. southern red oak OH (T), PA (E)
QUHI Quercus hinckleyi C.H. Mull. Hinckley oak T TX (T)
QUIL Quercus ilicifolia Wangenh. bear oak VT (E)
QUIM Quercus imbricaria Michx. shingle oak NJ (E)
QULY Quercus lyrata Walter overcup oak NJ (E)
QUMA2 Quercus macrocarpa Michx. bur oak CT (E), MA (SC)
QUMU Quercus muehlenbergii Engelm. chinkapin oak MA (T)
QUPR5 Quercus prinoides J.M. Coult., non Willd. IN (E)
QUNI Quercus nigra L. water oak NJ (E)
QUOG Quercus oglethorpensis Duncan Oglethorpe oak GA (T)
QUPH Quercus phellos L. willow oak IL (T), NY (E), PA (E)
QUPR Quercus prinoides Willd. dwarf chinkapin oak RI (SC)
QUPR2 Quercus prinus L. chestnut oak
QUMO4 Quercus montana Willd. IL (T), ME (T)
QUSH Quercus shumardii Buckley Shumard's oak MD (T), PA (E)
QUSIS Quercus sinuata Walter var. sinuata bastard oak
QUDU2 Quercus durandii Buckley AR (T)
QUST Quercus stellata Wangenh. post oak RI (SC)
QUTE Quercus texana Buckley Texas red oak
QUNU Quercus nuttallii Palmer IL (E)
RAVO2 Radula voluta Taylor TN (SC)
RAFA60 Ramalina farinacea (L.) Ach. farinose cartilage lichen OH (PRX)
RAIN3 Ramalina intermedia (Delise ex Nyl.) Nyl. intermediate cartilage lichen OH (E)
RAPE7 Ramalina petrina Bowler & Rundel cartilage lichen OH (T)
RAPO60 Ramalina pollinaria (Westr.) Ach. cartilage lichen OH (E)
RAAE Ranunculus aestivalis (L.D. Benson) Van Buren & Harper fall buttercup
RAACA Ranunculus acriformis A. Gray var. aestivalis L.D. Benson E
RAAL2 Ranunculus allegheniensis Britton Allegheny Mountain buttercup NJ (E), RI (SC), VT (T)
RAAM Ranunculus ambigens S. Watson waterplantain spearwort CT (E), KY (SC), ME (PX), MD (E, X), MI (T), NH (E), RI (SC)
RACY Ranunculus cymbalaria Pursh alkali buttercup CT (E), IL (E), MI (T), NJ (E), NY (E), RI (H), WI (T)
RAFA Ranunculus fascicularis Muhl. ex Bigelow early buttercup ME (T), MD (E), NH (E), NJ (E), PA (E)
RAFL Ranunculus flabellaris Raf. yellow water buttercup MD (E), RI (SC), TN (T)
RAFL2 Ranunculus flammula L. greater creeping spearwort PA (X)
RAFLF Ranunculus flammula L. var. filiformis (Michx.) Hook. greater creeping spearwort CT (SC)
RARE80 Ranunculus reptans L. NJ (E)
RAGM Ranunculus gmelinii DC. Gmelin's buttercup ME (T)
RAGMH Ranunculus gmelinii DC. var. hookeri (D. Don) L.D. Benson WI (E)
RAHA Ranunculus harveyi (A. Gray) Britton Harvey's buttercup IN (E)
RAHE2 Ranunculus hederaceus L. ivy buttercup MD (E, X), PA (X)
RAHIH Ranunculus hispidus Michx. var. hispidus bristly buttercup RI (SC)
RAHIN Ranunculus hispidus Michx. var. nitidus (Chapm.) T. Duncan bristly buttercup MD (E, X), NY (E)
RALA Ranunculus lapponicus L. Lapland buttercup ME (T), MI (T), WI (E)
RALA2 Ranunculus laxicaulis (Torr. & A. Gray) Darby Mississippi buttercup IN (E)
RALO2 Ranunculus longirostris Godr. longbeak buttercup PA (T), TN (E)
RASU Ranunculus subrigidus W. Drew CT (SC)
RAMA2 Ranunculus macounii Britton Macoun's buttercup MI (T)
RAMI2 Ranunculus micranthus Nutt. rock buttercup MA (E), NY (T), RI (T)
RAPE2 Ranunculus pensylvanicus L. f. Pennsylvania buttercup CT (SC), MD (E, X), MA (T)
RAPO Ranunculus populago Greene popular buttercup WA (S)
RAPU Ranunculus pusillus Poir. low spearwort IN (E), OH (E), PA (E)
RARH Ranunculus rhomboideus Goldie Labrador buttercup IL (T), MI (T)
RASC3 Ranunculus sceleratus L. cursed buttercup CT (SC), RI (SC)
RATR Ranunculus trichophyllus Chaix threadleaf crowfoot MD (E), PA (R)
RATRT Ranunculus trichophyllus Chaix var. trichophyllus threadleaf crowfoot
RATRC2 Ranunculus trichophyllus Chaix var. calvescens W. Drew RI (T)
RATR6 Ranunculus triternatus A. Gray obscure buttercup
RARE5 Ranunculus reconditus A. Nelson & J.F. Macbr., nom. illeg. OR (E), WA (T)
RAPI Ratibida pinnata (Vent.) Barnhart pinnate prairie coneflower PA (X)
REMA3 Remirea maritima Aubl. beachstar FL (E)
REKA Remya kauaiensis Hillebr. Kauai remya E
REMA2 Remya mauiensis Hillebr. Maui remya E
REMO Remya montgomeryi W.L. Wagner & D.R. Herbst Kalalau Valley remya E
RESE Reynosia septentrionalis Urb. darlingplum FL (T)
RHPE10 Rhachithecium perpusillum (Thwaites & Mitt.) Broth. rhachithecium moss TN (SC)
RHAL Rhamnus alnifolia L'Hér. alderleaf buckthorn IL (E), TN (E)
RHLA Rhamnus lanceolata Pursh lanceleaf buckthorn PA (E)
RHHY Rhapidophyllum hystrix (Pursh) H. Wendl. & Drude ex Drude needle palm FL (CE)
RHAR Rhexia aristosa Britton awnpetal meadowbeauty NJ (E), NC (T)
RHMA Rhexia mariana L. Maryland meadowbeauty MA (E), PA (E)
RHMAI Rhexia mariana L. var. interior (Pennell) Kral & Bostick Maryland meadowbeauty
RHIN9 Rhexia interior Pennell NJ (E)
RHMAM2 Rhexia mariana L. var. mariana Maryland meadowbeauty IN (E), MI (T)
RHPA3 Rhexia parviflora Chapm. white meadowbeauty FL (E)
RHSA3 Rhexia salicifolia Kral & Bostick panhandle meadowbeauty FL (T)
RHVI Rhexia virginica L. handsome Harry IA (T), VT (T)
RHBA2 Rhipsalis baccifera (Sol. ex J.S. Muell.) Stearn mistletoe cactus FL (E)
RHINL Rhodiola integrifolia Raf. ssp. leedyi (Rosend. & J.W. Moore) Kartesz Leedy's stonecrop
SEINL Sedum integrifolium (Raf.) A. Nelson ssp. leedyi (Rosend. & J.W. Moore) R.T. Clausen T MN (E), NY (E)
RHRH4 Rhodiola rhodantha (A. Gray) H. Jacobsen redpod stonecrop
SERH Sedum rhodanthum A. Gray AZ (SR)
RHRO3 Rhodiola rosea L. roseroot stonecrop
SERO2 Sedum rosea (L.) Scop. NY (E), NC (E), PA (E), TN (X), VT (T)
RHAL5 Rhododendron alabamense Rehder Alabama azalea FL (E)
RHAR3 Rhododendron arborescens (Pursh) Torr. smooth azalea NY (EV)
RHAT Rhododendron atlanticum (Ashe) Rehder dwarf azalea NJ (E), PA (E)
RHAU Rhododendron austrinum (Small) Rehder orange azalea FL (E)
RHCA4 Rhododendron calendulaceum (Michx.) Torr. flame azalea OH (E), PA (X)
RHCA6 Rhododendron canadense (L.) Torr. rhodora NJ (E), NY (T)
RHCA7 Rhododendron canescens (Michx.) Sweet mountain azalea FL (CE), KY (E)
RHCH5 Rhododendron chapmanii A. Gray Chapman's rhododendron E FL (E)
RHLA2 Rhododendron lapponicum (L.) Wahlenb. Lapland rosebay ME (T), NY (E), WI (E)
RHMA4 Rhododendron maximum L. great laurel ME (T), MA (T), NY (EV), OH (T), VT (T)
RHPE4 Rhododendron periclymenoides (Michx.) Shinners pink azalea NY (EV), RI (SC)
RHNU3 Rhododendron nudiflorum (L.) Torr. NH (E), OH (T)
RHPR Rhododendron prinophyllum (Small) Millais early azalea NY (EV)
RHPR2 Rhododendron prunifolium (Small) Millais plumleaf azalea GA (T)
RHVI2 Rhododendron viscosum (L.) Torr. swamp azalea ME (E), NH (T), NY (EV)
RHAR4 Rhus aromatica Aiton fragrant sumac CT (SC)
RHARA Rhus aromatica Aiton var. arenaria (Greene) Fernald fragrant sumac IN (T), OH (PRX)
RHKE Rhus kearneyi F.A. Barkley Kearney's sumac AZ (SR)
RHMI11 Rhus michauxii Sarg. false poison sumac E FL (E), GA (E), NC (SC, E)
RHLA5 Rhynchosia latifolia Nutt. ex Torr. & A. Gray prairie snoutbean TN (PX, E)
RHPA2 Rhynchosia parvifolia DC. small-leaf snoutbean FL (T)
RHSW Rhynchosia swartzii (Vail) Urb. Swartz's snoutbean FL (E)
RHTO3 Rhynchosia tomentosa (L.) Hook. & Arn. twining snoutbean KY (E), MD (T)
RHAL3 Rhynchospora alba (L.) Vahl white beaksedge IL (T), TN (PX, E)
RHCA11 Rhynchospora capillacea Torr. needle beaksedge CT (E), IA (T), ME (T), MA (E), MN (T), NH (E), NJ (E), PA (E), TN (PX, E), VT (T)
RHCE Rhynchospora cephalantha A. Gray bunched beaksedge MD (E)
RHCH2 Rhynchospora chalarocephala Fernald & Gale loosehead beaksedge TN (T)
RHCO7 Rhynchospora colorata (L.) H. Pfeiffer starrush whitetop AR (E)
RHCO2 Rhynchospora corniculata (Lam.) A. Gray shortbristle horned beaksedge
RHCOI Rhynchospora corniculata (Lam.) A. Gray var. interior Fernald IN (T)
RHCR3 Rhynchospora crinipes Gale mosquito beaksedge FL (E), NC (E)
RHFI Rhynchospora filifolia A. Gray threadleaf beaksedge NJ (E)
RHFU Rhynchospora fusca (L.) W.T. Aiton brown beaksedge PA (X)
RHGL2 Rhynchospora globularis (Chapm.) Small globe beaksedge KY (SC), MD (E), MI (E), NJ (E), OH (E)
RHGL3 Rhynchospora glomerata (L.) Vahl clustered beaksedge IL (E), MD (T), NJ (E)
RHGR Rhynchospora gracilenta A. Gray slender beaksedge PA (X)
RHIN7 Rhynchospora inundata (Oakes) Fernald narrowfruit horned beaksedge MD (E), MA (T), NY (T), RI (E)
RHKN Rhynchospora knieskernii Carey Knieskern's beaksedge T NJ (E)
RHLA7 Rhynchospora latifolia (Baldw. ex Elliot) W.W. Thomas sandswamp whitetop TN (PX, E)
RHMA5 Rhynchospora macra (C.B. Clarke ex Britton) Small large beaksedge NC (E)
RHMA6 Rhynchospora macrostachya Torr. ex A. Gray tall horned beaksedge CT (T), IN (R), KY (E), ME (E), RI (T)
RHME3 Rhynchospora megaplumosa Bridges & Orzell Manatee beaksedge FL (E)
RHMI8 Rhynchospora microcephala (Britton) Britton smallhead beaksedge NJ (E)
RHNI Rhynchospora nitens (Vahl) A. Gray shortbeak beaksedge MD (E), MA (T), NY (T)
PSNI Psilocarya nitens (Vahl) Alph. Wood IN (X)
RHPA Rhynchospora pallida M.A. Curtis pale beaksedge MD (E, X)
RHPE2 Rhynchospora perplexa Britton pineland beaksedge TN (T)
RHRA2 Rhynchospora rariflora (Michx.) Elliot fewflower beaksedge AR (T), MD (E, X), NJ (E), TN (E)
RHRE8 Rhynchospora recognita (Gale) Kral globe beaksedge
RHGLR Rhynchospora globularis (Chapm.) Small var. recognita Gale IN (E)
RHSC5 Rhynchospora scirpoides (Torr.) A. Gray longbeak beaksedge CT (E), MD (T), MA (SC), NY (R), RI (E)
PSSC2 Psilocarya scirpoides Torr. IN (T), MI (T), WI (T)
RHST2 Rhynchospora stenophylla Chapm. coastal plain beaksedge FL (T)
RHTH Rhynchospora thornei Kral Thorne's beaksedge NC (E)
RHTO4 Rhynchospora torreyana A. Gray Torrey's beaksedge MD (T), MA (E), NY (E), RI (E)
RHWR Rhynchospora wrightiana Boeckeler Wright's beaksedge TN (PX, E)
RIAM2 Ribes americanum Mill. American black currant MD (E, X)
RIAUV Ribes aureum Pursh var. villosum DC. golden currant
RIOD Ribes odoratum H. Wendl. TN (T)
RICEC Ribes cereum Douglas var. colubrinum C.L. Hitchc. wax currant WA (S)
RIEC Ribes echinellum (Coville) Rehder Miccosukee gooseberry T FL (E)
RIGL Ribes glandulosum Grauer skunk currant CT (E), NJ (E), OH (PRX)
RIHI Ribes hirtellum Michx. hairystem gooseberry IL (E), RI (SC)
RIHU Ribes hudsonianum Richardson northern black currant IA (T)
RILA Ribes lacustre (Pers.) Poir. prickly currant CT (SC), MA (SC), PA (E)
RIMI Ribes missouriense Nutt. Missouri gooseberry NJ (E), OH (E), PA (E)
RIOX Ribes oxyacanthoides L. Canadian gooseberry WI (T)
RIOXI Ribes oxyacanthoides L. ssp. irriguum (Douglas) Sinnott Idaho gooseberry WA (S)
RIRO2 Ribes rotundifolium Michx. Appalachian gooseberry CT (SC)
RITR Ribes triste Pall. red currant CT (E), OH (E), PA (T)
ROCO3 Rorippa columbiae (Suksd. ex B.L. Rob.) Suksd. ex Howell Columbian yellowcress WA (T)
ROSU2 Rorippa subumbellata Rollins Lake Tahoe yellowcress CA (E), NV (FP)
ROAC Rosa acicularis Lindl. prickly rose IL (E), IA (E), MA (E), NH (E), VT (E)
ROACS Rosa acicularis Lindl. ssp. sayi (Schwein.) W.H. Lewis prickly rose NY (E)
ROAR3 Rosa arkansana Porter prairie rose OH (PRX)
ROBL Rosa blanda Aiton smooth rose MD (E), OH (T)
ROBLG Rosa blanda Aiton var. glabra Crép. smooth rose ME (SC)
ROMI80 Rosa minutifolia Engelm. Baja rose CA (E)
RONI Rosa nitida Willd. shining rose CT (SC), NY (E)
ROSTA Rosa stellata Woot. ssp. abyssa A. Phillips desert rose AZ (SR)
RORA Rotala ramosior (L.) Koehne lowland rotala CT (E), MA (E), MN (T), NY (T), PA (R), RI (E), WA (S)
ROEL Roystonea elata (Bartram) F. Harper Florida royal palm FL (E)
RUAL9 Rubus alumnus L.H. Bailey oldfield blackberry IN (X)
RUARA2 Rubus arcticus L. ssp. acaulis (Michx.) Focke dwarf raspberry
RUAC Rubus acaulis Michx. MI (E), WA (S)
RUAR7 Rubus arenicola Blanch. sanddwelling dewberry ME (PX)
RUCA16 Rubus canadensis L. smooth blackberry KY (E), NJ (E)
RUCE2 Rubus centralis L.H. Bailey Illinois dewberry IN (E)
RUCH Rubus chamaemorus L. cloudberry MN (T), NH (E)
RUCU Rubus cuneifolius Pursh sand blackberry CT (SC), NH (E), NY (E), PA (E)
RUDE4 Rubus deamii L.H. Bailey Deam's dewberry IN (X)
RUDE8 Rubus depavitus L.H. Bailey Aberdeen dewberry IN (X)
RUFL Rubus flagellaris Willd. northern dewberry
RUEN Rubus enslenii Tratt. IN (E)
RUIM2 Rubus impar L.H. Bailey Posey County blackberry IN (X)
RUNI Rubus nigerrimus (Greene) Rydb. dark raspberry WA (E)
RUOD Rubus odoratus L. purpleflowering raspberry IL (E), IN (T)
RUPU Rubus pubescens Raf. dwarf red blackberry IL (T)
RUSE Rubus setosus Bigelow setose blackberry IL (E), IN (E), OH (PRX)
RUTR Rubus trivialis Michx. southern dewberry OH (PRX)
RUWH Rubus whartoniae L.H. Bailey Wharton's dewberry KY (T), TN (SC)
RUFU2 Rudbeckia fulgida Aiton orange coneflower NJ (E)
RUFUF Rudbeckia fulgida Aiton var. fulgida orange coneflower IN (R)
RUFUU Rudbeckia fulgida Aiton var. umbrosa (C.L. Boynt. & Beadle) Cronquist orange coneflower IN (E)
RUHE Rudbeckia heliopsidis Torr. & A. Gray sunfacing coneflower NC (E)
RUHIH Rudbeckia hirta L. var. hirta blackeyed Susan NY (E)
RULA3 Rudbeckia laciniata L. cutleaf coneflower RI (T)
RUMI Rudbeckia missouriensis Engelm. ex C.L. Boynt. & Beadle Missouri orange coneflower IL (E)
RUNI3 Rudbeckia nitida Nutt. shiny coneflower FL (E)
RUSU Rudbeckia subtomentosa Pursh sweet coneflower KY (E), MI (PREX), TN (T)
RUTR2 Rudbeckia triloba L. browneyed Susan FL (E)
RUCA4 Ruellia caroliniensis (J.F. Gmel.) Steud. Carolina wild petunia NJ (E), PA (X)
RUHU Ruellia humilis Nutt. fringeleaf wild petunia MD (E), MI (T), NC (T), PA (E), WI (E)
RUNO Ruellia noctiflora (Nees) A. Gray nightflowering wild petunia FL (E)
RUPU2 Ruellia purshiana Fernald Pursh's wild petunia MD (E), TN (SC)
RUST2 Ruellia strepens L. limestone wild petunia MD (E), MI (T), PA (T)
RUNU2 Rugelia nudicaulis Shuttlw. ex Chapm. Rugel's Indianplantain TN (E)
CARU16 Cacalia rugelia (A. Gray) T.M. Barkley & Cronquist NC (T)
RUAL4 Rumex altissimus Alph. Wood pale dock MD (E)
RUAQF Rumex aquaticus L. var. fenestratus (Greene) Dorn western dock
RUOC3 Rumex occidentalis S. Watson MI (E)
RUHA2 Rumex hastatulus Baldw. heartwing sorrel NY (E), PA (X)
RUMA4 Rumex maritimus L. golden dock
RUMAF2 Rumex maritimus L. var. fueginus (Phil.) Dusén CT (SC), NY (E)
RUOR3 Rumex orthoneurus Rech. f. Chiricahua Mountain dock AZ (HS)
RUPA4 Rumex pallidus Bigelow seaside dock MA (T), NH (E)
RUVE3 Rumex verticillatus L. swamp dock MA (T)
RUFL2 Rumex floridanus Meisn. MD (E)
RUMA5 Ruppia maritima L. widgeongrass MI (T)
SAAN Sabatia angularis (L.) Pursh rosepink MI (T), NY (E)
SACA26 Sabatia campanulata (L.) Torr. slender rose gentian AR (E), IN (X), KY (E), MD (E), MA (E), NY (E), PA (X)
SACA3 Sabatia campestris Nutt. Texas star IL (E)
SACA27 Sabatia capitata (Raf.) S.F. Blake Appalachian rose gentian GA (R), TN (E)
SADI2 Sabatia difformis (L.) Druce lanceleaf rose gentian MD (E)
SADO Sabatia dodecandra (L.) Britton, Sterns & Poggenb. marsh rose gentian CT (SC)
SAKE Sabatia kennedyana Fernald Plymouth rose gentian MA (SC), NC (SC, T), RI (E)
SAST5 Sabatia stellaris Pursh rose of Plymouth CT (E), MA (E), NY (T), RI (T)
SAAL21 Saccharum alopecuroides (L.) Nutt. silver plumegrass
SAAL9 Saccharum alopecuroidum (L.) Nutt., orth. var. OH (PRX)
SABRC3 Saccharum brevibarbe (Michx.) Pers. var. contortum (Elliott) R. Webster sortbeard plumegrass
ERCO2 Erianthus contortus Elliot MD (T)
SAGI Saccharum giganteum (Walter) Pers. sugarcane plumegrass
ERGI Erianthus giganteus (Walter) P. Beauv. PA (X)
SAST Sacciolepis striata (L.) Nash American cupscale MD (E), NJ (E), TN (SC)
SAPO3 Sachsia polycephala Griseb. Bahama sachsia
SABA9 Sachsia bahamensis Urb. FL (T)
SAMI10 Sageretia minutiflora (Michx.) C. Mohr smallflower mock buckthorn GA (T)
SADE Sagina decumbens (Elliot) Torr. & A. Gray trailing pearlwort NY (E), OH (PRX)
SANO Sagina nodosa (L.) Fenzl knotted pearlwort MI (T)
SANOB Sagina nodosa (L.) Fenzl ssp. borealis Crow knotted pearlwort MN (E)
SANON Sagina nodosa (L.) Fenzl ssp. nodosa knotted pearlwort MA (T)
SAAU2 Sagittaria australis (J.G. Sm.) Small longbeak arrowhead IN (R), NJ (E)
SABR8 Sagittaria brevirostra Mack. & Bush shortbeak arrowhead TN (T)
SACA21 Sagittaria calycina Engelm. hooded arrowhead ME (SC)
SACAS Sagittaria calycina Engelm. var. spongiosa Engelm. hooded arrowhead NY (T), PA (E)
SAMOS2 Sagittaria montevidensis Cham. & Schltdl. ssp. spongiosa (Engelm.) Bogin MA (E)
SACU Sagittaria cuneata Sheldon arumleaf arrowhead CT (SC), MA (T), NH (T), NJ (E), OH (T)
SAEN Sagittaria engelmanniana J.G. Sm. Engelmann's arrowhead MD (T)
SAFA5 Sagittaria fasciculata E.O. Beal bunched arrowhead E NC (E)
SAFI2 Sagittaria filiformis J.G. Sm. threadleaf arrowhead
SAST4 Sagittaria stagnorum Small PA (X)
SAGR Sagittaria graminea Michx. grassy arrowhead KY (T), OH (E), RI (SC), TN (T)
SALA2 Sagittaria latifolia Willd. broadleaf arrowhead
SALO11 Sagittaria longirostra (Micheli) J.G. Sm. IL (E)
SAMO Sagittaria montevidensis Cham. & Schltdl. giant arrowhead MI (T)
SAPL Sagittaria platyphylla (Engelm.) J.G. Sm. delta arrowhead KY (T), OH (PRX), TN (SC)
SARI Sagittaria rigida Pursh sessilefruit arrowhead KY (E), ME (T), MD (E), OH (T), TN (SC)
SASE9 Sagittaria secundifolia Kral Little River arrowhead T GA (T)
SASU Sagittaria subulata (L.) Buchenau awl-leaf arrowhead CT (SC), PA (R), RI (H)
SASUS Sagittaria subulata (L.) Buchenau var. subulata MA (E)
SATE2 Sagittaria teres S. Watson slender arrowhead MA (SC), NJ (E), NY (E), RI (E)
SABI Salicornia bigelovii Torr. dwarf saltwort ME (SC), NH (T), NY (T)
SADE10 Salicornia depressa Standl. Virginia glasswort
SAVI Salicornia virginica L. NH (T)
SAMA11 Salicornia maritima Wolff & Jefferies slender grasswort ME (PX)
SARU Salicornia rubra A. Nelson red swampfire MN (T)
SAAM2 Salix amygdaloides Andersson peachleaf willow KY (H)
SAAR6 Salix arctophila Cockerell ex A. Heller northern willow ME (E)
SAAR7 Salix argyrocarpa Andersson Labrador willow ME (E), NH (T)
SABE2 Salix bebbiana Sarg. Bebb willow MD (E, X)
SACA4 Salix candida Flueggé ex Willd. sageleaf willow ME (T), OH (T), PA (E), WA (S)
SACA5 Salix caroliniana Michx. coastal plain willow OH (T), PA (E)
SACO3 Salix cordata Michx. heartleaf willow NY (E), WI (E)
SASY4 Salix syrticola Fernald IL (E)
SADI Salix discolor Muhl. pussy willow KY (H)
SAER Salix eriocephala Michx. Missouri River willow FL (E)
SACO24 Salix cordata Muhl., nom. illeg., non Salix cordata Michx. IN (T)
SAEX Salix exigua Nutt. narrowleaf willow CT (T), MD (E), MA (T)
SAFL Salix floridana Chapm. Florida willow FL (E), GA (E)
SAGL Salix glauca L. grayleaf willow WA (S)
SAHE2 Salix herbacea L. snowbed willow ME (T), NH (T), NY (E)
SAIN3 Salix interior Rowlee sandbar willow ME (E)
SALU Salix lucida Muhl. shining willow IA (T), MD (E, X)
SAMA12 Salix maccalliana Rowlee McCalla's willow WA (S)
SAMY2 Salix myricoides Muhl. bayberry willow ME (E)
SAPE2 Salix pedicellaris Pursh bog willow CT (E), IA (T), NJ (E), OH (E), PA (E), RI (H)
SAPE3 Salix pellita Andersson satiny willow NH (T), WI (E)
SAPE5 Salix petiolaris Sm. meadow willow CT (SC), OH (T), PA (E)
SAPL2 Salix planifolia Pursh diamondleaf willow ME (T), MI (T), NH (T), VT (T), WI (T)
SAPY Salix pyrifolia Andersson balsam willow NY (T)
SASE Salix sericea Marsh. silky willow AR (E)
SASE2 Salix serissima (L.H. Bailey) Fernald autumn willow CT (SC), IL (E), IN (T), PA (T)
SASE3 Salix sessilifolia Nutt. northwest sandbar willow WA (T)
SATW Salix tweedyi (Bebb ex Rose) C.R. Ball Tweedy's willow WA (S)
SAUV Salix uva-ursi Pursh bearberry willow ME (T), NY (T), VT (E)
SAVE Salix vestita Pursh rock willow
SAVEE Salix vestita Pursh var. erecta Andersson WA (PX)
SAAZG Salvia azurea Michx. ex Lam. var. grandiflora Benth. pitcher sage TN (SC)
SAAZP Salvia azurea Michx. ex Lam. ssp. pitcheri (Torr. ex Benth.) Epling IL (T)
SALY2 Salvia lyrata L. lyreleaf sage NY (E)
SAUR Salvia urticifolia L. nettleleaf sage FL (E), KY (E), MD (E, X)
SAMI7 Salvinia minima Baker water spangles NY (EV)
SARAR3 Sambucus racemosa L. var. racemosa red elderberry
SAPU11 Sambucus pubens Michx. IL (E)
SARAP Sambucus racemosa L. ssp. pubens (Michx.) House KY (E)
SARAP5 Sambucus racemosa L. var. pubens (Michx.) Koehne RI (H)
SAVA3 Samolus valerandi L. seaside brookweed ME (SC)
SAVAP Samolus valerandi L. ssp. parviflorus (Raf.) Hultén seaside brookweed
SAPA9 Samolus parviflorus Raf. NH (T), PA (E), WA (S)
SACA13 Sanguinaria canadensis L. bloodroot NY (EV), RI (SC)
SACA14 Sanguisorba canadensis L. Canadian burnet GA (T), IL (E), IN (E), KY (E), ME (T), MD (T), MI (T), RI (E), TN (E)
SAME6 Sanguisorba menziesii Rydb. Menzies' burnet WA (S)
SAAR9 Sanicula arctopoides Hook. & Arn. footsteps of spring WA (S)
SACA15 Sanicula canadensis L. Canadian blacksnakeroot MA (T), VT (T)
SAMA2 Sanicula marilandica L. Maryland sanicle WA (S)
SAMA3 Sanicula maritima Kellogg ex S. Watson adobe snakeroot CA (R)
SAMA9 Sanicula mariversa Nagata & Gon Waianae Range blacksnakeroot E
SAOD Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe clustered blacksnakeroot MA (T)
SAGR6 Sanicula gregaria E.P. Bicknell NH (T)
SAPU8 Sanicula purpurea H. St. John & Hosaka purpleflower blacksnakeroot E
SASA3 Sanicula saxatilis Greene devil's blacksnakeroot CA (R)
SASM Sanicula smallii E.P. Bicknell Small's blacksnakeroot IN (R)
SATR4 Sanicula trifoliata E.P. Bicknell largefruit blacksnakeroot NH (T), NJ (E)
SAFRL2 Santalum freycinetianum Gaudich. var. lanaiense Rock Lanai sandalwood E
SAFL4 Sarracenia flava L. yellow pitcherplant GA (U)
SALE4 Sarracenia leucophylla Raf. crimson pitcherplant FL (E), GA (E)
SAMI9 Sarracenia minor Walter hooded pitcherplant FL (T), GA (U)
SAOR3 Sarracenia oreophila (Kearney) Wherry green pitcherplant E GA (E), NC (SC, E), TN (PX, E)
SAPS2 Sarracenia psittacina Michx. parrot pitcherplant FL (T), GA (T)
SAPU4 Sarracenia purpurea L. purple pitcherplant FL (T), GA (E), IL (E), MD (T), NY (EV)
SAPUG Sarracenia purpurea L. ssp. gibbosa (Raf.) Wherry purple pitcherplant
SAPUH Sarracenia purpurea L. ssp. heterophylla (Eaton) Torr. MI (T)
SARU4 Sarracenia rubra Walter sweet pitcherplant FL (T), GA (E)
SARUA Sarracenia rubra Walter ssp. alabamensis (F.W. Case & R.B. Case) Schnell Alabama pitcherplant E
SARUJ Sarracenia rubra Walter ssp. jonesii (Wherry) Wherry Jones' pitcherplant E
SAJO Sarracenia jonesii Wherry NC (SC, E)
SAAL5 Sassafras albidum (Nutt.) Nees sassafras ME (SC)
SACE Saururus cernuus L. lizard's tail CT (E), RI (E)
SABA6 Savia bahamensis Britton Bahama maidenbush FL (E)
SAAI Saxifraga aizoides L. yellow mountain saxifrage NY (T)
SACA20 Saxifraga caroliniana A. Gray Carolina saxifrage TN (E)
SACE2 Saxifraga cernua L. nodding saxifrage MN (E), NH (E), WA (S)
SAFO4 Saxifraga foliolosa R. Br. leafystem saxifrage ME (E)
SAMI5 Saxifraga michauxii Britton Michaux's saxifrage KY (T)
SAMI6 Saxifraga micranthidifolia (Haw.) Steud. lettuceleaf saxifrage KY (E), PA (R)
SAOP Saxifraga oppositifolia L. purple mountain saxifrage NY (E)
SAPA14 Saxifraga paniculata Mill. White Mountain saxifrage ME (E), MI (T), MN (T), NY (E)
SAPAN Saxifraga paniculata Mill. ssp. neogaea (Butters) D. Löve White Mountain saxifrage
SAAIN2 Saxifraga aizoon Jacq. var. neogaea Butters NH (E)
SAPE8 Saxifraga pensylvanica L. eastern swamp saxifrage KY (H), ME (T), RI (SC), TN (E)
SAFO2 Saxifraga forbesii Vasey IN (E)
SARI8 Saxifraga rivularis L. weak saxifrage NH (E), WA (S)
SATR5 Saxifraga tricuspidata Rottb. three toothed saxifrage MI (T)
SAVI5 Saxifraga virginiensis Michx. early saxifrage IL (E), IN (R), RI (SC)
SAFR5 Saxifragopsis fragarioides (Greene) Small strawberry saxifrage WA (S)
SCCO7 Scaevola coriacea Nutt. dwarf naupaka E
SCPL Scaevola plumieri (L.) Vahl gullfeed FL (T)
SCFR Schaefferia frutescens Jacq. Florida boxwood FL (E)
SCPA2 Scheuchzeria palustris L. rannoch-rush CT (E), MA (E), NJ (E), NY (R), OH (E), PA (E), RI (E)
SCPAA3 Scheuchzeria palustris L. ssp. americana (Fernald) Hultén rannoch-rush IN (E), VT (T)
SCAD Schiedea adamantis H. St. John Diamond Head schiedea E
SCAP Schiedea apokremnos H. St. John Kauai schiedea E
SCHA4 Schiedea haleakalensis O. Deg. & Sherff Haleakala schiedea E
SCHE2 Schiedea helleri Sherff Kaholuamanu schiedea E
SCHO Schiedea hookeri A. Gray sprawling schiedea E
SCKA Schiedea kaalae Wawra Oahu schiedea E
SCKA4 Schiedea kauaiensis H. St. John Kauai schiedea E
SCKE Schiedea kealiae Caum & Hosaka Waianae Range schiedea E
SCLY2 Schiedea lydgatei Hillebr. Kamalo Gulch schiedea E
SCME2 Schiedea membranacea H. St. John papery schiedea E
SCNU3 Schiedea nuttallii Hook. valley schiedea E
SCSA4 Schiedea sarmentosa O. Deg. & Sherff cliff schiedea E
SCSPL Schiedea spergulina A. Gray var. leiopoda Sherff canyon schiedea E
SCSPS Schiedea spergulina A. Gray var. spergulina canyon schiedea T
SCST3 Schiedea stellarioides H. Mann lau lihilihi E
SCVE3 Schiedea verticillata F. Br. Devils Slide schiedea E
SCAR8 Schiedeella arizonica P.M. Brown parasitic lady's tresses
SPPA4 Spiranthes parasitica auct. non A. Rich. & Galeotti AZ (SR)
SCGL7 Schisandra glabra (E.P. Bicknell) Rehder bay starvine GA (T), KY (E), NC (SC, T), TN (T)
SCCO3 Schisandra coccinea Michx. FL (E)
SCPE9 Schistostega pennata (Hedw.) F. Weber & D. Mohr. schistostega moss MN (E)
SCPU Schizachne purpurascens (Torr.) Swallen false melic CT (SC), IL (E), IN (E), KY (T), MD (E), NJ (E), OH (E)
SCLI11 Schizachyrium littorale (Nash) E.P. Bicknell shore little bluestem
SCSCL Schizachyrium scoparium (Michx.) Nash var. littorale (Nash) Gould OH (E), PA (R)
SCNI2 Schizachyrium niveum (Swallen) Gould pinescrub bluestem FL (E)
SCPU2 Schizaea pusilla Pursh little curlygrass fern NY (E)
SCLA9 Schlotheimia lancifolia E.B. Bartram lanceleaf schlotheimia moss NC (T)
SCAR5 Schoenocrambe argillacea (S.L. Welsh & N.D. Atwood) Rollins Uinta Basin plainsmustard T
SCBA80 Schoenocrambe barnebyi (S.L. Welsh & N.D. Atwood) Rollins Syes Butte plainsmustard E
SCCR Schoenolirion croceum (Michx.) Alph. Wood yellow sunnybell FL (E), TN (T)
SCWR3 Schoenolirion wrightii Sherman Texas sunnybell AR (T)
SCACA Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. acutus hardstem bulrush
SCAC Scirpus acutus Muhl. ex Bigelow CT (T), PA (E)
SCAM6 Schoenoplectus americanus (Pers.) Volkart ex Schinz & R. Keller chairmaker's bulrush
SCOL Scirpus olneyi A. Gray MI (T)
SCET2 Schoenoplectus etuberculatus (Steud.) Soják Canby's bulrush
SCET3 Scirpus etuberculatus (Steud.) Kunze MD (E), RI (E)
SCFL11 Schoenoplectus fluviatilis (Torr.) M.T. Strong river bulrush
BOFL3 Bolboschoenus fluviatilis (Torr.) Soják MA (SC)
SCFL Scirpus fluviatilis (Torr.) A. Gray KY (E), PA (R), TN (SC)
SCHA9 Schoenoplectus hallii (A. Gray) S.G. Sm. Hall's bulrush
SCHA Scirpus hallii A. Gray IL (T), IN (E), KY (E), MI (T), WI (E)
SCHE5 Schoenoplectus heterochaetus (Chase) Soják slender bulrush
SCHE Scirpus heterochaetus Chase KY (E), NY (E), PA (X)
SCMA8 Schoenoplectus maritimus (L.) Lye cosmopolitan bulrush
SCMA Scirpus maritimus L. NJ (E), NY (E), RI (SC)
SCPA4 Scirpus paludosus A. Nelson IL (E)
SCPAA4 Scirpus paludosus A. Nelson var. atlanticus Fernald CT (SC)
SCNO5 Schoenoplectus novae-angliae (Britton) M.T. Strong New England bulrush
BONO Bolboschoenus novae-angliae (Britton) S.G. Sm. ME (PX)
SCCY2 Scirpus cylindricus (Torr.) Britton CT (SC)
SCNO3 Scirpus novae-angliae Britton NY (E)
SCPU13 Schoenoplectus purshianus (Fernald) M.T. Strong weakstalk bulrush
SCPU4 Scirpus purshianus Fernald IL (E), IN (E)
SCRO5 Schoenoplectus robustus (Pursh) M.T. Strong sturdy bulrush
SCRO Scirpus robustus Pursh NH (T)
SCSM2 Schoenoplectus smithii (A. Gray) Soják Smith's bulrush
SCSM Scirpus smithii A. Gray IL (E), IN (E), MD (E, X), OH (E), PA (E), RI (T)
SCST10 Schoenoplectus ×steinmetzii (Fernald) S.G. Sm. [heterochaetus × tabernaemontani] ME (T)
SCSU10 Schoenoplectus subterminalis (Torr.) Soják swaying bulrush
SCSU Scirpus subterminalis Torr. IN (R), MD (E), OH (E), RI (SC), TN (SC)
SCTO3 Schoenoplectus torreyi (Olney) Palla Torrey's bulrush NJ (E)
SCTO Scirpus torreyi Olney CT (T), IN (E), MD (E, X), OH (PRX), PA (E), RI (SC)
SCAR2 Schoepfia arenaria Britton arana T
SCAM Schwalbea americana L. chaffseed E CT (SC), FL (E), GA (E), KY (H), MD (E, X), NJ (E), NC (E), TN (PX, E)
SCAN5 Scirpus ancistrochaetus Schuyler barbedbristle bulrush E MD (E), MA (E), NH (E), PA (T), VT (E), VA (E)
SCEX Scirpus expansus Fernald woodland bulrush IN (E), KY (E), OH (T)
SCGE2 Scirpus georgianus Harper Georgia bulrush CT (SC), NY (E)
SCHA3 Scirpus hattorianus Makino mosquito bulrush IL (E)
SCLO Scirpus longii Fernald Long's bulrush CT (SC), ME (T), MA (T), NJ (E), RI (E)
SCMI2 Scirpus microcarpus J. Presl & C. Presl panicled bulrush KY (E), NJ (E)
SCPE3 Scirpus pedicellatus Fernald stalked bulrush NJ (E), PA (T)
SCPE4 Scirpus pendulus Muhl. rufous bulrush ME (E), NH (T)
SCPO2 Scirpus polyphyllus Vahl leafy bulrush IL (T), NH (E), VT (E)
SCCIC Scleria ciliata Michx. var. ciliata fringed nutrush KY (E)
SCLI3 Scleria lithosperma (L.) Sw. Florida Keys nutrush FL (E)
SCMI4 Scleria minor W. Stone slender nutrush MD (E), NY (E), PA (E)
SCMU8 Scleria muehlenbergii Steud. Muehlenberg's nutrush
SCREP Scleria reticularis Michx. var. pubescens Britton NY (E)
SCOL2 Scleria oligantha Michx. littlehead nutrush OH (E)
SCPA5 Scleria pauciflora Muhl. ex Willd. fewflower nutrush MA (E), MI (E), OH (T), PA (T), RI (T)
SCPAC Scleria pauciflora Muhl. ex Willd. var. caroliniana (Willd.) Alph. Wood Carolina nutrush CT (E), NY (E)
SCRE Scleria reticularis Michx. netted nutrush CT (E), IN (T), MI (T), PA (E), RI (T), WI (E)
SCTR Scleria triglomerata Michx. whip nutrush CT (E), MA (E), MN (E), NY (T), RI (T)
SCNI3 Scleria nitida Muhl. ex Willd. MD (E)
SCVE2 Scleria verticillata Muhl. ex Willd. low nutrush AR (T), CT (SC), IA (T), MD (E), MN (T), NJ (E), NY (E), PA (E), TN (SC)
SCBRT Sclerocactus brevihamatus (Engelm.) D.R. Hunt ssp. tobuschii (W.T. Marsh.) N.P. Taylor shorthook fishhook cactus
ANTO3 Ancistrocactus tobuschii (W.T. Marsh.) W.T. Marsh. ex Backeb. E TX (E)
SCBR12 Sclerocactus brevispinus K.D. Heil & J.M. Porter Pariette cactus US
SCGL3 Sclerocactus glaucus (J.A. Purpus ex K. Schum.) L.D. Benson Uinta Basin hookless cactus T
SCME4 Sclerocactus mesae-verdae (Boissev. & C. Davidson) L.D. Benson Mesa Verde fishhook cactus T NM (E)
SCNY Sclerocactus nyensis F. Hochstätter Nye County fishhook cactus NV (CY)
SCPA10 Sclerocactus papyracanthus (Engelm.) N.P. Taylor paperspine fishhook cactus
PEPA20 Pediocactus papyracanthus (Engelm.) L.D. Benson AZ (SR)
SCPA9 Sclerocactus parviflorus Clover & Jotter smallflower fishhook cactus AZ (SR)
SCPAI2 Sclerocactus parviflorus Clover & Jotter ssp. intermedius (Peebles) K.D. Heil & J.M. Porter intermediate fishhook cactus
SCPAI Sclerocactus parviflorus Clover & Jotter var. intermedius (Peebles) Woodruff & L.D. Benson AZ (SR)
SCPAP Sclerocactus parviflorus Clover & Jotter ssp. parviflorus smallflower fishhook cactus
SCCLB Sclerocactus cloveriae K.D. Heil & J.M. Porter ssp. brackii K.D. Heil & J.M. Porter NM (E)
SCPO4 Sclerocactus polyancistrus (Engelm. & Bigelow) Britton & Rose redspined fishhook cactus NV (CY)
SCPU6 Sclerocactus pubispinus (Engelm.) L.D. Benson Great Basin fishhook cactus AZ (SR), NV (CY)
SCSI3 Sclerocactus sileri (L.D. Benson) K.D. Heil & J.M. Porter Siler's pincushion cactus
PESI4 Pediocactus sileri (Engelm. ex J.M. Coult.) L.D. Benson T AZ (HS)
SCSP2 Sclerocactus spinosior (Engelm.) Woodruff & L.D. Benson desert valley fishhook cactus AZ (SR)
SCSPB Sclerocactus spinosior (Engelm.) Woodruff & L.D. Benson ssp. blainei (S.L. Welsh & Thorne) F. Hochstätter Blaine fishhook cactus
SCBL Sclerocactus blainei S.L. Welsh & Thorne NV (CY)
SCSC5 Sclerocactus schlesseri K.D. Heil & S.L. Welsh NV (CY)
SCWE Sclerocactus wetlandicus Hochstätter Uinta Basin hookless cactus US
SCWH Sclerocactus whipplei (Engelm. & Bigelow) Britton & Rose Whipple's fishhook cactus AZ (SR)
SCWR Sclerocactus wrightiae L.D. Benson Wright's fishhook cactus E
SCUN3 Sclerolepis uniflora (Walter) Britton, Sterns & Poggenb. pink bogbutton MD (T), MA (E), NH (E), RI (E)
SCDI5 Sclerolinon digynum (A. Gray) C.M. Rogers northwestern yellowflax WA (S)
SCCA18 Scopelophila cataractae (Mitt.) Broth. cataract scopelophila moss TN (SC)
SCSC70 Scorpidium scorpioides (Hedw.) Limpr. scorpidium moss OH (PRX)
SCBO Scribneria bolanderi (Thurb.) Hack. Scribner's grass WA (S)
SCLA Scrophularia lanceolata Pursh lanceleaf figwort RI (SC)
SCMA2 Scrophularia marilandica L. carpenter's square ME (PX), RI (T)
SCAR4 Scutellaria arguta Buckley Blue Ridge skullcap KY (T), TN (E)
SCBU Scutellaria bushii Britton Bush's skullcap AR (T)
SCFL4 Scutellaria floridana Chapm. Florida skullcap T FL (E)
SCHA6 Scutellaria havanensis Jacq. Havana skullcap FL (E)
SCIN Scutellaria incana Biehler hoary skullcap MI (PREX), NY (E)
SCIN2 Scutellaria integrifolia L. helmet flower CT (E), NY (E)
SCMO6 Scutellaria montana Chapm. largeflower skullcap T GA (E), TN (E)
SCNE2 Scutellaria nervosa Pursh veiny skullcap MD (E), MI (T)
SCOC2 Scutellaria ocmulgee Small Ocmulgee skullcap GA (T)
SCOV Scutellaria ovata Hill heartleaf skullcap MI (PREX), MN (T)
SCPA7 Scutellaria parvula Michx. small skullcap ME (PX), MD (E, X), MI (T)
SCPAA2 Scutellaria parvula Michx. var. australis Fassett small skullcap IN (R)
SCPAM Scutellaria parvula Michx. var. missouriensis (Torr.) Goodman & C.A. Lawson Leonard's skullcap
SCLE Scutellaria leonardii Epling CT (E), MD (T), NJ (E)
SCPAP3 Scutellaria parvula Michx. var. parvula small skullcap IN (X), WI (E)
SCSA5 Scutellaria saxatilis Riddell smooth rock skullcap IN (E), KY (T), MD (E), PA (E), TN (T)
SCSE5 Scutellaria serrata Andrews showy skullcap PA (E)
SEBI9 Sebastiania bilocularis S. Watson arrow poision plant
SABI4 Sapium biloculare (S. Watson) Pax AZ (SR)
SELE7 Sedella leiocarpa H. Sharsm. Lake County mock stonecrop
PALE8 Parvisedum leiocarpum (H. Sharsm.) R.T. Clausen E CA (E)
SECO Sedum cockerellii Britton Cockerell's stonecrop AZ (SR)
SEGR Sedum griffithsii Rose AZ (SR)
SEGL3 Sedum glaucophyllum R.T. Clausen cliff stonecrop MD (E)
SELA Sedum lanceolatum Torr. spearleaf stonecrop AZ (SR)
SENE Sedum nevii A. Gray Nevius' stonecrop GA (T), TN (E)
SEPU6 Sedum pusillum Michx. granite stonecrop GA (T), NC (E)
SEST Sedum stelliforme S. Watson Huachuca Mountain stonecrop AZ (SR)
SEAP Selaginella apoda (L.) Spring meadow spikemoss IN (E), ME (E)
SEEA Selaginella eatonii Hieron. ex Small Eaton's spikemoss FL (E)
SEEC Selaginella eclipes W.R. Buck hidden spikemoss IA (E), OH (T)
SERU Selaginella rupestris (L.) Spring northern selaginella IN (T), OH (PRX)
SESE Selaginella selaginoides (L.) P. Beauv. ex Mart. & Schrank club spikemoss ME (T), MN (E), WI (E)
SECO2 Senecio congestus (R. Br.) DC. marsh fleabane MI (PREX)
SEMUH Senecio multidentatus Sch. Bip. ex Hemsl. var. huachucanus (A. Gray) T.M. Barkley Huachuca Mountain ragwort
SEHU Senecio huachucanus A. Gray AZ (HS)
SEHE3 Senna hebecarpa (Fernald) Irwin & Barneby American senna CT (SC), MA (E), RI (H), VT (T)
CAHE9 Cassia hebecarpa Fernald NH (E)
SEME4 Senna mexicana (Jacq.) Irwin & Barneby Mexican senna FL (T)
SEOB4 Senna obtusifolia (L.) Irwin & Barneby Java-bean IN (R)
SENE9 Serianthes nelsonii Merr. Hayun lagu E
SEAS3 Sericocarpus asteroides (L.) Britton, Sterns & Poggenb. toothed whitetop aster ME (E)
SELI5 Sericocarpus linifolius (L.) Britton, Sterns & Poggenb. narrowleaf whitetop aster NH (T)
ASSO2 Aster solidagineus Michx. NY (T), OH (T), PA (E)
SERI4 Sericocarpus rigidus Lindl. Columbian whitetop aster
ASCU2 Aster curtus Cronquist OR (T), WA (S)
SETO3 Sesbania tomentosa Hook. & Arn. Oahu riverhemp E
SEMA3 Sesuvium maritimum (Walter) Britton, Sterns & Poggenb. slender seapurslane MD (E), NY (E)
SEPA10 Setaria parviflora (Poir.) Kerguélen marsh bristlegrass MA (SC)
SEGE Setaria geniculata (Wild.) P. Beauv., nom. illeg. IN (E), RI (SC)
SECA4 Seymeria cassioides (J.F. Gmel.) S.F. Blake yaupon blacksenna TN (PX, E)
SHAR Shepherdia argentea (Pursh) Nutt. silver buffaloberry IA (T)
SHCA Shepherdia canadensis (L.) Nutt. russet buffaloberry IL (E), IN (X), ME (E), PA (E)
SHRO2 Shinnersoseris rostrata (A. Gray) S. Tomb beaked skeletonweed MN (T)
LYRO2 Lygodesmia rostrata (A. Gray) A. Gray IA (E)
SHGA Shortia galacifolia Torr. & A. Gray Oconee bells GA (E), NC (SC, E)
SIFI Sibara filifolia (Greene) Greene Santa Cruz Island winged rockcress E
SIPR Sibbaldia procumbens L. creeping sibbaldia NH (E)
SITR3 Sibbaldiopsis tridentata (Aiton) Rydb. shrubby fivefingers GA (E)
POTR7 Potentilla tridentata Aiton CT (E), IA (E), NJ (E), PA (E), RI (H), TN (SC)
SIAL7 Sicyos albus (H. St. John) Telford white bur cucumber E
SIHE3 Sida hermaphrodita (L.) Rusby Virginia fanpetals IN (E), KY (SC), MD (E), PA (E), TN (PX, E)
SICO2 Sidalcea covillei Greene Owens Valley sidalcea CA (E)
SIHIA Sidalcea hickmanii Greene ssp. anomala C.L. Hitchc. Cuesta Pass checker CA (R)
SIHIP Sidalcea hickmanii Greene ssp. parishii (B.L. Rob.) C.L. Hitchc. Parish's checker CA (R)
SIHI3 Sidalcea hirtipes C.L. Hitchc. bristlystem checkerbloom WA (E)
SIKE Sidalcea keckii Wiggins Keck's checkerbloom E
SIMAV Sidalcea malviflora (DC.) A. Gray ex Benth. ssp. virgata (Howell) C.L. Hitchc. dwarf checkerbloom WA (E)
SINE2 Sidalcea nelsoniana Piper Nelson's checkerbloom T OR (T), WA (E)
SIORC2 Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray ssp. oregana var. calva C.L. Hitchc. Oregon checkerbloom E WA (E)
SIORV Sidalcea oregana (Nutt. ex Torr. & A. Gray) A. Gray ssp. valida (Greene) C.L. Hitchc. Kenwood Marsh checkerbloom E CA (E)
SIPE4 Sidalcea pedata A. Gray birdfoot checkerbloom E CA (E)
SIST3 Sidalcea stipularis J.T. Howell & True Scadden Flat checkerbloom CA (E)
SIAL13 Sideroxylon alachuense L.C. Anderson Alachua bully FL (E)
SILAL3 Sideroxylon lanuginosum Michx. ssp. lanuginosum gum bully
BULA Bumelia lanuginosa (Michx.) Pers. IL (E)
SILY Sideroxylon lycioides L. buckthorn bully FL (E)
BULY Bumelia lycioides (L.) Pers. IN (E)
SITH2 Sideroxylon thornei (Cronquist) T.D. Penn. Georgia bully FL (E), GA (E)
SIAC Silene acaulis (L.) Jacq. moss campion ME (PX)
SIACE Silene acaulis (L.) Jacq. var. exscapa (All.) DC. moss campion NH (T)
SIAL4 Silene alexandri Hillebr. Kamalo Gulch catchfly E
SICAC Silene campanulata S. Watson ssp. campanulata Red Mountain catchfly CA (E)
SICA6 Silene caroliniana Walter sticky catchfly FL (E), NY (EV)
SICAP Silene caroliniana Walter ssp. pensylvanica (Michx.) R.T. Clausen Pennsylvania catchfly TN (T)
SICAP2 Silene caroliniana Walter var. pensylvanica (Michx.) Fernald OH (T)
SICAW Silene caroliniana Walter ssp. wherryi (Small) R.T. Clausen Wherry's catchfly
SICAW2 Silene caroliniana Walter var. wherryi (Small) Fernald OH (E)
SIDOO Silene douglasii Hook. var. oraria (M. Peck) C.L. Hitchc. & Maguire seabluff catchfly OR (T)
SIHA5 Silene hawaiiensis Sherff Hawai'i catchfly T
SILA7 Silene lanceolata A. Gray Kauai catchfly E
SINI Silene nivea (Nutt.) Muhl. ex Otth evening campion MD (E), MN (T), NJ (E), OH (T), WI (T)
SIOV Silene ovata Pursh Blue Ridge catchfly AR (T), IL (E), IN (E), KY (T), TN (E)
SIPE5 Silene perlmanii W.L. Wagner, D.R. Herbst & Sohmer cliffface catchfly E
SIPO Silene polypetala (Walter) Fernald & B.G. Schub. eastern fringed catchfly E FL (E), GA (E)
SIRE2 Silene regia Sims royal catchfly AR (T), GA (R), IL (E), IN (T), KY (E), TN (PX, E)
SISE2 Silene seelyi Morton & J.W. Thomp. Seely's catchfly WA (T)
SISP2 Silene spaldingii S. Watson Spalding's silene T OR (E), WA (T)
SIST Silene stellata (L.) W.T. Aiton widowsfrill CT (SC), MI (T), RI (H)
SIVI4 Silene virginica L. fire pink FL (E), MI (T), WI (E)
SIBR2 Silphium brachiatum Gattinger Cumberland rosinweed TN (E)
SIIN2 Silphium integrifolium Michx. wholeleaf rosinweed MI (T)
SILA3 Silphium laciniatum L. compassplant MI (T), OH (E), TN (T)
SILAL2 Silphium laciniatum L. var. laciniatum compassplant KY (E)
SILAR Silphium laciniatum L. var. robinsonii L.M. Perry Robinson's compassplant KY (T)
SIPE2 Silphium perfoliatum L. cup plant MI (T)
SIPI2 Silphium pinnatifidum Elliot tansy rosinweed KY (SC), TN (T)
SITR7 Silphium trifoliatum L. whorled rosinweed IL (E)
SIWA Silphium wasiotense M. Medley Appalachian rosinweed KY (SC), TN (E)
SIAL3 Sisyrinchium albidum Raf. white blue-eyed grass PA (X)
SIHA4 Sisyrinchium hastile E.P. Bicknell p.p. MI (PREX)
SIAT Sisyrinchium atlanticum E.P. Bicknell eastern blue-eyed grass IL (E), MI (T), OH (E), PA (E)
SIDI5 Sisyrinchium dichotomum E.P. Bicknell wishbone blue-eyed grass E NC (E)
SIFA2 Sisyrinchium farwellii E.P. Bicknell Farwell's blue-eyed grass MI (PREX)
SIFU2 Sisyrinchium fuscatum E.P. Bicknell coastal plain blue-eyed grass MD (E, X), MA (SC), RI (H)
SIAR2 Sisyrinchium arenicola E.P. Bicknell PA (X)
SIMO2 Sisyrinchium montanum Greene strict blue-eyed grass IL (E), IN (E), NJ (E), OH (E), WA (S)
SIMU3 Sisyrinchium mucronatum Michx. needletip blue-eyed grass ME (SC), MA (E), NY (E), OH (E)
SISA4 Sisyrinchium sarmentosum Suksd. ex Greene mountain blue-eyed grass WA (T)
SISE4 Sisyrinchium septentrionale E.P. Bicknell northern blue-eyed grass WA (S)
SMUV Smallanthus uvedalius (L.) Mack. ex Small hairy leafcup
POUV2 Polymnia uvedalia (L.) L. MI (T), NJ (E), NY (E)
SMCO Smilax coriacea Spreng. Everglades greenbrier
SMHA Smilax havanensis auct. non Jacq. FL (T)
SMLA3 Smilax lasioneura Hook. Blue Ridge carrionflower
SMHEL2 Smilax herbacea L. var. lasioneura (Hook.) A. DC. OH (T)
SMPS Smilax pseudochina L. bamboo vine MD (T), NY (E), PA (X)
SMPU2 Smilax pulverulenta Michx. downy carrionflower NY (E)
SMHEP2 Smilax herbacea L. var. pulverulenta (Michx.) A. Gray OH (E)
SMTA2 Smilax tamnoides L. bristly greenbrier
SMHI Smilax hispida Muhl. ex Torr. CT (SC)
SOBAB Solanum bahamense L. var. bahamense Bahama nightshade
SODR2 Solanum drymophilum O.E. Schulz E PR (E)
SODO3 Solanum donianum Walp. mullein nightshade FL (T)
SOIN Solanum incompletum Dunal thorny popolo E
SOSA4 Solanum sandwicense Hook. & Arn. Hawai'i horsenettle E
SOAL3 Solidago albopilosa E.L. Braun whitehair goldenrod T KY (T)
SOAL6 Solidago altissima L. Canada goldenrod ME (PX)
SOAR Solidago arguta Aiton Atlantic goldenrod OH (PRX)
SOARA Solidago arguta Aiton var. arguta Atlantic goldenrod
SOTA2 Solidago tarda Mack. TN (SC)
SOARH Solidago arguta Aiton var. harrisii (Steele) Cronquist Harris' goldenrod PA (E)
SOBU Solidago buckleyi Torr. & A. Gray Buckley's goldenrod IN (E), KY (SC)
SOCA4 Solidago caesia L. wreath goldenrod WI (E)
SOCA9 Solidago calcicola Fernald limestone goldenrod ME (PX)
SOCU Solidago curtisii Torr. & A. Gray mountain decumbent goldenrod KY (T), MD (E), PA (E)
SOCU2 Solidago cutleri Fernald Cutler's alpine goldenrod NH (T)
SOER Solidago erecta Pursh showy goldenrod PA (E)
SOFL2 Solidago flexicaulis L. zigzag goldenrod RI (T)
SOGA Solidago gattingeri Chapm. ex A. Gray Gattinger's goldenrod TN (E)
SOGR4 Solidago gracillima Torr. & A. Gray Virginia goldenrod KY (SC)
SOHI Solidago hispida Muhl. ex Willd. hairy goldenrod MD (E, X)
SOLA6 Solidago lancifolia Torr. & A. Gray lance-leaf goldenrod TN (E)
SOLA4 Solidago latissimifolia Mill. Elliott's goldenrod
SOEL2 Solidago elliottii Torr. & A. Gray CT (SC), NY (E), RI (SC)
SOMA4 Solidago macrophylla Pursh largeleaf goldenrod MA (T)
SOMI2 Solidago missouriensis Nutt. Missouri goldenrod MI (T)
SOMU Solidago multiradiata Aiton Rocky Mountain goldenrod ME (T)
SOMUA Solidago multiradiata Aiton var. arctica (DC.) Fernald arctic goldenrod NY (T)
SOOD Solidago odora Aiton anisescented goldenrod NH (T), OH (T), VT (T)
SOPA2 Solidago patula Muhl. ex Willd. roundleaf goldenrod IA (E)
SOPL Solidago plumosa Small plumed goldenrod NC (E)
SOPU Solidago puberula Nutt. downy goldenrod KY (SC), OH (E)
SOPU3 Solidago pulchra Small Carolina goldenrod NC (E)
SORO2 Solidago roanensis Porter Roan Mountain goldenrod KY (T), MD (E), PA (R)
SORUA Solidago rugosa Mill. ssp. aspera (Aiton) Cronquist wrinkleleaf goldenrod NY (E)
SORUS Solidago rugosa Mill. ssp. rugosa var. sphagnophila Graves wrinkleleaf goldenrod CT (SC), NY (E)
SORU3 Solidago rupestris Raf. rock goldenrod MD (E, X), TN (E)
SOSC Solidago sciaphila Steele shadowy goldenrod IL (T)
SOSEM Solidago sempervirens L. var. mexicana (L.) Fernald seaside goldenrod NY (E)
SOSH Solidago shortii Torr. & A. Gray Short's goldenrod E KY (E)
SOSIR Solidago simplex Kunth ssp. randii (Porter) Ringius Rand's goldenrod KY (SC), MA (E), TN (T)
SOSIG2 Solidago simplex Kunth ssp. randii (Porter) Ringius var. gillmanii (A. Gray) Ringius Rand's goldenrod IN (T), WI (T)
SOSIR2 Solidago simplex Kunth ssp. randii (Porter) Ringius var. racemosa (Greene) Ringius Rand's goldenrod NY (E)
SOSPR4 Solidago spathulata DC. var. racemosa (Greene) Gleason PA (E)
SOSIR3 Solidago simplex Kunth ssp. randii (Porter) Ringius var. randii (Porter) Kartesz & Gandhi Rand's goldenrod NY (T)
SOSIS4 Solidago simplex Kunth ssp. simplex var. spathulata (DC.) Cronquist Mt. Albert goldenrod
SOSP Solidago spathulata DC. MD (T)
SOSP2 Solidago speciosa Nutt. showy goldenrod MD (T)
SOSP4 Solidago sphacelata Raf. autumn goldenrod OH (E)
SOSP6 Solidago spithamaea M.A. Curtis Blue Ridge goldenrod T NC (E), TN (E)
SOSQ Solidago squarrosa Nutt. stout goldenrod IN (E), KY (H), OH (T)
SOUL Solidago uliginosa Nutt. bog goldenrod IA (E), TN (SC)
SOULL2 Solidago uliginosa Nutt. var. linoides (Torr. & A. Gray) Fernald bog goldenrod
SOPU8 Solidago purshii Porter NH (T)
SOUL2 Solidago ulmifolia Muhl. ex Willd. elmleaf goldenrod ME (PX), VT (E)
SOVE2 Solidago verna M.A. Curtis ex Torr. & A. Gray springflowering goldenrod NC (T)
SOAM3 Sorbus americana Marsh. American mountain ash IL (E)
SODE3 Sorbus decora (Sarg.) C.K. Schneid. northern mountain ash IN (X), MA (E), OH (E), PA (E)
SOEL3 Sorghastrum elliottii (C. Mohr) Nash slender Indiangrass MD (E)
SONU2 Sorghastrum nutans (L.) Nash Indiangrass ME (E), RI (SC)
SPAM Sparganium americanum Nutt. American bur-reed IL (E)
SPAN Sparganium androcladum (Engelm.) Morong branched bur-reed IN (T), PA (E), TN (E)
SPAN2 Sparganium angustifolium Michx. narrowleaf bur-reed NJ (E)
SPEM2 Sparganium emersum Rehmann European bur-reed
SPCH Sparganium chlorocarpum Rydb. IL (E), OH (E)
SPEU Sparganium eurycarpum Engelm. broadfruit bur-reed KY (E), NH (T)
SPFL Sparganium fluctuans (Engelm. ex Morong) B.L. Rob. floating bur-reed CT (E)
SPGL Sparganium glomeratum (Beurling ex Laest.) L. Neum. clustered bur-reed WI (T)
SPNA Sparganium natans L. small bur-reed MA (E), NY (T), VT (T)
SPMI Sparganium minimum Wallr. CT (SC), NJ (E), PA (X)
SPCY Spartina cynosuroides (L.) Roth big cordgrass MA (T), RI (SC)
SPPE Spartina pectinata Bosc ex Link prairie cordgrass WA (S)
SPCA3 Spergularia canadensis (Pers.) G. Don Canadian sandspurry CT (T), RI (SC)
SPGL2 Spermacoce glabra Michx. smooth false buttonweed MD (E)
SPTE8 Spermacoce terminalis (Small) Kartesz & Gandhi Everglades Key false buttonweed FL (T)
SPHA2 Spermolepis hawaiiensis H. Wolff Hawai'i scaleseed E
SPCO Sphaeralcea coccinea (Nutt.) Rydb. scarlet globemallow IA (T)
SPAN11 Sphagnum angustifolium (C.E.O. Jensen ex Russow) C.E.O. Jensen sphagnum NJ (E)
SPAU70 Sphagnum austinii Sull. Austin's sphagnum NJ (E)
SPBA2 Sphagnum bartlettianum Warnst. Bartlett's sphagnum OH (E)
SPCE2 Sphagnum centrale C.E.O. Jensen sphagnum NJ (E)
SPCO14 Sphagnum contortum Schultz contorted sphagnum NJ (E)
SPFU70 Sphagnum fuscum (Schimp.) Klinggr. sphagnum NC (E)
SPMAF Sphagnum macrophyllum Brid. var. floridanum Austin Florida sphagnum NJ (E)
SPMAN Sphagnum majus (Russow) C.E.O. Jensen ssp. norvegica Flatberg sphagnum NJ (E)
SPNI2 Sphagnum nitidum Warnst. sphagnum VT (E)
SPSU8 Sphagnum subfulvum Sjors NJ (E)
SPPL70 Sphagnum platyphyllum (Lindb. ex Braithw.) Sull. ex Warnst. sphagnum NJ (E)
SPQU Sphagnum quinquefarium (Lindb. ex Braithw.) Warnst. sphagnum KY (E), NJ (E)
SPRI70 Sphagnum riparium Ĺngstr. streamside sphagnum NJ (E), OH (E)
SPST9 Sphagnum strictum Sull. sphagnum NJ (E)
SPSU9 Sphagnum subsecundum Nees sphagnum NJ (E)
SPPE9 Sphenolobopsis pearsonii (Spruce) R.M. Schust. TN (E)
SPNI Sphenopholis nitida (Biehler) Scribn. shiny wedgescale MA (T), RI (SC), VT (E)
SPOB Sphenopholis obtusata (Michx.) Scribn. prairie wedgescale ME (PX), NH (E), NY (E), OH (T), RI (SC), VT (E)
SPPE3 Sphenopholis pensylvanica (L.) Hitchc. swamp wedgescale KY (SC), MD (T), MA (T), NY (E), RI (H)
SPGE Spigelia gentianoides Chapm. ex A. DC. purpleflower pinkroot E FL (E)
SPLO3 Spigelia loganioides (Torr. & A. Gray ex Endl. & Fenzl) A. DC. Florida pinkroot FL (E)
SPMA3 Spigelia marilandica (L.) L. woodland pinkroot IN (E)
SPAL2 Spiraea alba Du Roi white meadowsweet KY (E), TN (E)
SPALL Spiraea alba Du Roi var. latifolia (Aiton) Dippel white meadowsweet OH (PRX)
SPBE2 Spiraea betulifolia Pall. white spirea PA (T)
SPSE Spiraea septentrionalis (Fernald) Á. Löve & D. Löve northern meadowsweet ME (SC), NY (E)
SPVI2 Spiraea virginiana Britton Virginia meadowsweet T GA (T), KY (T), NC (E), OH (E), PA (X), TN (E), VA (E)
SPBR Spiranthes brevilabris Lindl. Texas lady's tresses FL (E)
SPCA6 Spiranthes casei Catling & Cruise Case's lady's tresses NH (E), NY (EV), PA (E)
SPCE Spiranthes cernua (L.) Rich. nodding lady's tresses NY (EV)
SPDE6 Spiranthes delitescens Sheviak reclusive lady's tresses E AZ (HS)
SPDI6 Spiranthes diluvialis Sheviak Ute lady's tresses T NE (T), NV (FP), WA (E)
SPLA4 Spiranthes lacera (Raf.) Raf. northern slender lady's tresses IA (T), NY (EV)
SPLAG Spiranthes lacera (Raf.) Raf. var. gracilis (Bigelow) Luer northern slender lady's tresses ME (PX)
SPLA3 Spiranthes laciniata (Small) Ames lacelip lady's tresses FL (T), NJ (E)
SPLO2 Spiranthes longilabris Lindl. giantspiral lady's tresses FL (T), NC (T)
SPLU2 Spiranthes lucida (H.H. Eaton) Ames shining lady's tresses IL (E), IN (R), IA (E), KY (T), ME (T), MD (E), NH (T), NY (EV), RI (H), TN (T)
SPMA5 Spiranthes magnicamporum Sheviak Great Plains lady's tresses GA (E), IN (E), KY (T), NM (E), PA (X)
SPOC Spiranthes ochroleuca (Rydb.) Rydb. yellow nodding lady's tresses IN (T), KY (SC), MD (E), NY (EV), TN (PX, E)
SPOD Spiranthes odorata (Nutt.) Lindl. marsh lady's tresses KY (E), MD (E, X), TN (E)
SPOV Spiranthes ovalis Lindl. October lady's tresses FL (E), IA (T), MI (T), PA (E)
SPPA5 Spiranthes parksii Correll Navasota lady's tresses E TX (E)
SPPO7 Spiranthes porrifolia Lindl. creamy lady's tresses WA (S)
SPRO Spiranthes romanzoffiana Cham. hooded lady's tresses AZ (SR), IL (E), IN (E), IA (T), MA (E), NY (EV), OH (T), PA (E)
SPTO5 Spiranthes torta (Thunb.) Garay & H.R. Sweet southern lady's tresses FL (E)
SPTU Spiranthes tuberosa Raf. little lady's tresses FL (T), NY (EV), PA (X), RI (E)
SPTUG Spiranthes tuberosa Raf. var. grayi (Ames) Fernald CT (SC)
SPVE Spiranthes vernalis Engelm. & A. Gray spring lady's tresses IL (E), IN (R), IA (T), MA (T), NH (E), NY (E), PA (E), RI (SC)
SPCL Sporobolus clandestinus (Biehler) Hitchc. rough dropseed CT (SC), KY (T), MD (E), NY (E), PA (E)
SPCOC2 Sporobolus compositus (Poir.) Merr. var. compositus composite dropseed
SPAS Sporobolus asper (P. Beauv.) Kunth CT (SC), ME (E), RI (SC), VT (E)
SPCR Sporobolus cryptandrus (Torr.) A. Gray sand dropseed CT (E), NH (T), PA (R)
SPHE Sporobolus heterolepis (A. Gray) A. Gray prairie dropseed CT (E), KY (E), MD (E), NY (T), NC (E), OH (T), PA (E)
SPJU Sporobolus junceus (P. Beauv.) Kunth pineywoods dropseed AR (T), TN (SC)
SPNE2 Sporobolus neglectus Nash puffsheath dropseed CT (SC), ME (PX), MD (E, X), MA (E), NH (E), NJ (E)
SPPY2 Sporobolus pyramidatus (Lam.) Hitchc. Madagascar dropseed AR (T)
SPTE4 Sporobolus teretifolius Harper wireleaf dropseed NC (T)
STGR6 Stachydeoma graveolens (Chapm. ex A. Gray) Small mock pennyroyal FL (E)
STAS Stachys aspera Michx. hyssopleaf hedgenettle MD (E)
STCL Stachys clingmanii Small Clingman's hedgenettle IN (E), MD (E), TN (T)
STCO9 Stachys cordata Riddell heartleaf hedgenettle
STNU2 Stachys nuttallii Shuttlw. ex Benth. PA (E)
STCR7 Stachys crenata Raf. mousesear FL (E)
STEP Stachys eplingii J.B. Nelson Epling's hedgenettle KY (E)
STHY3 Stachys hyssopifolia Michx. hyssopleaf hedgenettle CT (E), NY (T), PA (X), RI (T)
STLY2 Stachys lythroides Small FL (E)
STPIP5 Stachys pilosa Nutt. var. pilosa hairy hedgenettle
STPAH Stachys palustris L. var. homotricha Fernald NJ (E)
STTE Stachys tenuifolia Willd. smooth hedgenettle CT (SC), FL (E)
STMO Stahlia monosperma (Tul.) Urb. cobana negra T
STCA23 Stanfordia californica S. Watson St. Francis cabbage
CACA21 Caulanthus californicus (S. Watson) Payson E CA (E)
STTR Staphylea trifolia L. American bladdernut FL (E), NH (T)
STAL4 Stellaria alsine Grimm bog chickweed MD (E), TN (E)
STBO3 Stellaria borealis Bigelow boreal starwort CT (SC), NJ (E)
STCR Stellaria crassifolia Ehrh. fleshy starwort MI (T)
STFO Stellaria fontinalis (Short & Peter) B.L. Rob. American water starwort KY (T)
ARFO4 Arenaria fontinalis (Short & Peter) Shinners TN (T)
STLO Stellaria longifolia Muhl. ex Willd. longleaf starwort KY (SC), TN (E)
STLO2 Stellaria longipes Goldie longstalk starwort NY (T)
STPU Stellaria pubera Michx. star chickweed IL (E), NJ (E)
STGR2 Stenanthium gramineum (Ker Gawl.) Morong eastern featherbells FL (E), IL (E), IN (E), MD (T), OH (T)
STGRM Stenanthium gramineum (Ker Gawl.) Morong var. micranthum Fernald eastern featherbells KY (T)
STNIN Stenaria nigricans (Lam.) Terrell var. nigricans diamondflowers
HENI4 Hedyotis nigricans (Lam.) Fosberg MI (PREX)
HONI Houstonia nigricans (Lam.) Fernald IN (R)
STTH3 Stenocereus thurberi (Engelm.) Buxbaum organpipe cactus AZ (SR)
STAN3 Stenogyne angustifolia A. Gray narrowleaf stenogyne E
STBI3 Stenogyne bifida Hillebr. twocleft stenogyne E
STCA12 Stenogyne campanulata Weller & Sakai Kalalau Valley stenogyne E
STKA3 Stenogyne kanehoana O. Deg. & Sherff Oahu stenogyne E
STLA11 Stenorrhynchos lanceolatum (Aubl.) Rich. leafless beaked lady orchid FL (T)
STMI14 Stenorrhynchos michuacanum (Llave & Lex.) Schltr. Michuacan lady orchid
SPMI2 Spiranthes michuacana (Llave & Lex.) Hemsl. AZ (SR)
STLI2 Stenosiphon linifolius (Nutt. ex James) Heynh. false gaura AR (T)
STMA5 Stephanomeria malheurensis Gottlieb Malheur wirelettuce E OR (E)
STMA Stewartia malacodendron L. silky camellia AR (E), FL (E), GA (R)
STBE2 Sticta beauvoisii Delise Beauvois' spotted felt lichen OH (E)
STALA Streptanthus albidus Greene ssp. albidus Metcalf Canyon jewelflower E
STHY Streptanthus hyacinthoides Hook. smooth jewelflower AR (T)
STNI2 Streptanthus niger Greene Tiburon jewelflower E CA (E)
STSQ Streptanthus squamiformis Goodman pineoak jewelflower AR (T)
STAM2 Streptopus amplexifolius (L.) DC. claspleaf twistedstalk AZ (SR), NJ (E), PA (E), TN (T)
STAMA2 Streptopus amplexifolius (L.) DC. var. amplexifolius claspleaf twistedstalk
STAMA Streptopus amplexifolius (L.) DC. var. americanus Schult. & Schult. f. CT (T)
STLAL2 Streptopus lanceolatus (Aiton) Reveal var. lanceolatus twistedstalk
STROP2 Streptopus roseus Michx. var. perspectus Fassett KY (E)
STLAR Streptopus lanceolatus (Aiton) Reveal var. roseus (Michx.) Reveal twistedstalk
STRO4 Streptopus roseus Michx. IA (T), MD (T), NJ (E), OH (E), RI (T), TN (SC)
STLE6 Strophostyles leiosperma (Torr. & A. Gray) Piper slickseed fuzzybean IN (T)
STUM2 Strophostyles umbellata (Muhl. ex Willd.) Britton pink fuzzybean NY (E), RI (T)
STMA4 Strumpfia maritima Jacq. pride of Big Pine FL (E)
STFIA2 Stuckenia filiformis (Pers.) Börner ssp. alpina (Blytt) Haynes, D.H. Les & M. Kral fineleaf pondweed
POFIA Potamogeton filiformis Pers. var. alpinus (Blytt) Asch. & Graebn. NH (E), NY (E)
STFIA Stuckenia filiformis (Pers.) Böerner ssp. alpinus (Blytt) Haynes, D.H. Les & M. Kral, orth. var. ME (T)
STFIF Stuckenia filiformis (Pers.) Börner ssp. filiformis fineleaf pondweed
POFI2 Potamogeton filiformis Pers. OH (PRX), PA (X)
STFIO Stuckenia filiformis (Pers.) Börner ssp. occidentalis (J.W. Robbins) Haynes, D.H. Les & M. Kral western fineleaf pondweed ME (E)
POFIO Potamogeton filiformis Pers. var. occidentalis (J.W. Robbins) Morong NY (E)
STPE15 Stuckenia pectinata (L.) Börner sago pondweed
POPE6 Potamogeton pectinatus L. NH (T)
STVA8 Stuckenia vaginata (Turcz.) Holub sheathed pondweed
POVA2 Potamogeton vaginatus Turcz. WI (T)
STAB Stylisma abdita Myint showy dawnflower FL (E)
STHU2 Stylisma humistrata (Walter) Chapm. southern dawnflower TN (T)
STPI3 Stylisma pickeringii (Torr. ex M.A. Curtis) A. Gray Pickering's dawnflower IL (E), IA (E)
STPIP3 Stylisma pickeringii (Torr. ex M.A. Curtis) A. Gray var. pickeringii Pickering's dawnflower GA (T), NJ (E), NC (E)
STBI2 Stylosanthes biflora (L.) Britton, Sterns & Poggenb. sidebeak pencilflower PA (E)
STCA7 Stylosanthes calcicola Small Everglade Key pencilflower FL (E)
STAM4 Styrax americanus Lam. American snowbell IL (T), OH (PRX)
STGR4 Styrax grandifolius Aiton bigleaf snowbell IL (E), IN (E), OH (PRX)
STPLT Styrax platanifolius Engelm. ssp. texanus (Cory) P.W. Fritsch Texas snowbell
STTE5 Styrax texanus Cory E TX (E)
STPO3 Styrax portoricensis Krug & Urb. palo de jazmin E PR (E)
SUCA2 Suaeda calceoliformis (Hook.) Moq. Pursh seepweed ME (T)
SUAM Suaeda americana (Pers.) Fernald MA (SC)
SUCA Suaeda californica S. Watson California seablite E
SULI Suaeda linearis (Elliot) Moq. annual seepweed NY (E)
SUMAR Suaeda maritima (L.) Dumort. ssp. richii (Fernald) Bassett & C.W. Crompton Rich's seepweed ME (SC)
SURO Suaeda rolandii Bassett & C.W. Crompton Roland's seablite NJ (E), NY (E)
SUAQ Subularia aquatica L. waterawlwort ME (SC), MI (E), MN (T)
SUAQA2 Subularia aquatica L. var. americana (G. Mulligan & Calder) B. Boivin American waterawlwort NY (E)
SUOR Sullivantia oregana S. Watson Oregon coolwort WA (T)
SUSU3 Sullivantia sullivantii (Torr. & A. Gray) Britton Sullivant's coolwort IN (T), MN (T), TN (E)
SURE Sullivantia renifolia Rosend. IL (T)
SWAL Swallenia alexandrae (Swallen) Söderst. & Decker Eureka dunegrass E CA (R)
SWMA2 Swietenia mahagoni (L.) Jacq. West Indian mahogany FL (T)
SYAL Symphoricarpos albus (L.) S.F. Blake common snowberry KY (E), MD (T)
SYALA Symphoricarpos albus (L.) S.F. Blake var. albus common snowberry IL (E), MA (E), OH (PRX)
SYAN3 Symphyotrichum anticostense (Fernald) G.L. Nesom Anticosti Island aster ME (E)
SYBO2 Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve northern bog aster
ASBO7 Aster borealis (Torr. & A. Gray) Prov. NJ (E), NY (T), PA (E), WA (T)
ASJU Aster junciformis Rydb. IN (R), IA (T)
SYCI Symphyotrichum ciliolatum (Lindl.) Á. Löve & D. Löve Lindley's aster
ASCI Aster ciliolatus Lindl. NH (T), NY (E)
SYCO3 Symphyotrichum concolor (L.) G.L. Nesom eastern silver aster MA (E)
ASCO2 Aster concolor L. KY (T), MD (E), NY (E), RI (H)
SYDE2 Symphyotrichum depauperatum (Fernald) G.L. Nesom serpentine aster
ASDE9 Aster depauperatus Fernald MD (E), PA (T)
SYDI2 Symphyotrichum divaricatum (Nutt.) G.L. Nesom southern annual saltmarsh aster
ASDI17 Aster divaricatus (Nutt.) Torr. & A. Gray, non L. ME (T)
SYDRD Symphyotrichum drummondii (Lindl.) G.L. Nesom var. drummondii Drummond's aster
ASDR Aster drummondii Lindl. OH (T)
SYDRT Symphyotrichum drummondii (Lindl.) G.L. Nesom var. texanum (Burgess) G.L. Nesom Drummond's aster
ASDRT Aster drummondii Lindl. var. texanus (Burgess) A.G. Jones KY (T)
SYDUD2 Symphyotrichum dumosum (L.) G.L. Nesom var. dumosum rice button aster
ASDU Aster dumosus L. IA (E), OH (T)
SYERE Symphyotrichum ericoides (L.) G.L. Nesom var. ericoides white heath aster
ASER3 Aster ericoides L. TN (T)
SYGE Symphyotrichum georgianum (Alexander) G.L. Nesom Georgia aster
ASGE2 Aster georgianus Alexander NC (T)
SYJE Symphyotrichum jessicae (Piper) G.L. Nesom Jessica's aster
ASJE Aster jessicae Piper WA (E)
SYLAC Symphyotrichum laeve (L.) Á. Löve & D. Löve var. concinnum (Willd.) G.L. Nesom smooth blue aster
ASCO23 Aster concinnus Willd. MD (E, X)
ASLAC Aster laevis L. var. concinnus (Willd.) House NY (E)
SYLAL3 Symphyotrichum laeve (L.) Á. Löve & D. Löve var. laeve smooth blue aster
ASLA5 Aster laevis L. RI (SC)
SYLAI3 Symphyotrichum lanceolatum (Willd.) G.L. Nesom ssp. lanceolatum var. interior (Wiegand) G.L. Nesom white panicle aster
ASLAI5 Aster lanceolatus Willd. var. interior (Wiegand) Semple & Chmielewski NY (E)
SYLAL7 Symphyotrichum lateriflorum (L.) Á. Löve & D. Löve var. lateriflorum calico aster
ASLAH3 Aster lateriflorus (L.) Britton var. hirsuticaulis (Lindl. ex DC.) Porter NY (E)
SYNON Symphyotrichum novi-belgii (L.) G.L. Nesom var. novi-belgii New York aster
ASNO2 Aster novi-belgii L. PA (T)
SYOB Symphyotrichum oblongifolium (Nutt.) G.L. Nesom aromatic aster
ASOB2 Aster oblongifolius Nutt. IN (R), OH (T)
SYON2 Symphyotrichum ontarionis (Wiegand) G.L. Nesom bottomland aster
ASON Aster ontarionis Wiegand OH (E)
SYOOO Symphyotrichum oolentangiense (Riddell) G.L. Nesom var. oolentangiense skyblue aster
ASOO4 Aster oolentangiensis Riddell NY (E), TN (SC)
SYPA10 Symphyotrichum parviceps (Burgess) G.L. Nesom smallhead aster
ASPA4 Aster parviceps (Burgess) Mack. & Bush NC (E)
SYPAP2 Symphyotrichum patens (Aiton) G.L. Nesom var. patens late purple aster
ASPA5 Aster patens Aiton ME (PX), NH (T)
SYPIP2 Symphyotrichum pilosum (Willd.) G.L. Nesom var. pringlei (A. Gray) G.L. Nesom Pringle's aster
ASPIP Aster pilosus Willd. var. pringlei (A. Gray) S.F. Blake NY (T)
SYPRP Symphyotrichum praealtum (Poir.) G.L. Nesom var. praealtum willowleaf aster
ASPR2 Aster praealtus Poir. NJ (E), TN (E)
SYPR7 Symphyotrichum pratense (Raf.) G.L. Nesom barrens silky aster
ASPR3 Aster pratensis Raf. AR (T), KY (SC), TN (T)
SYPR6 Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L. Nesom crookedstem aster MA (T)
ASPR4 Aster prenanthoides Muhl. ex Willd. CT (SC)
SYPR4 Symphyotrichum priceae (Britton) G.L. Nesom lavender oldfield aster
ASPIP2 Aster pilosus Willd. var. priceae (Britton) Cronquist KY (T)
SYPUP Symphyotrichum puniceum (L.) Á. Löve & D. Löve var. puniceum purplestem aster
ASFI5 Aster firmus Nees NJ (E), PA (T)
ASPUF Aster puniceus L. var. firmus (Nees) Torr. & A. Gray NY (E)
SYSE2 Symphyotrichum sericeum (Vent.) G.L. Nesom western silver aster
ASSE2 Aster sericeus Vent. IN (R), MI (T)
SYSH Symphyotrichum shortii (Lindl.) G.L. Nesom Short's aster
ASSH Aster shortii Lindl. MN (T)
SYSU5 Symphyotrichum subulatum (Michx.) G.L. Nesom eastern annual saltmarsh aster ME (E)
ASSU5 Aster subulatus Michx. NY (T)
SYTE6 Symphyotrichum tenuifolium (L.) G.L. Nesom perennial saltmarsh aster
ASTE2 Aster tenuifolius L. NH (E)
SYTR Symphyotrichum tradescantii (L.) G.L. Nesom shore aster MA (T)
SYFO Symplocarpus foetidus (L.) Salisb. ex Nutt. skunk cabbage TN (E)
SYTI Symplocos tinctoria (L.) L'Hér. common sweetleaf TN (SC)
SYHI Synandra hispidula (Michx.) Britton Guyandotte beauty IL (E)
SYPIL Synthyris pinnatifida S. Watson var. lanuginosa (Piper) Cronquist featherleaf kittentails WA (S)
TAIN Taenidia integerrima (L.) Drude yellow pimpernel CT (E), RI (H), VT (T)
TAMO Taenidia montana (Mack.) Cronquist mountain pimpernel MD (T), PA (E)
TABI Tanacetum bipinnatum (L.) Sch. Bip. Lake Huron tansy ME (SC)
TABIH Tanacetum bipinnatum (L.) Sch. Bip. ssp. huronense (Nutt.) Breitung Lake Huron tansy
TAHU Tanacetum huronense Nutt. MI (T), WI (E)
TACA5 Taraxacum californicum Munz & I.M. Johnst. California dandelion E
TAHO Tauschia hooveri Mathias & Constance Hoover's umbrellawort WA (T)
TATE3 Tauschia tenuissima (Geyer ex Hook.) Mathias & Constance Leiberg's umbrellawort WA (PX)
TADI2 Taxodium distichum (L.) Rich. bald cypress IN (T)
TACA7 Taxus canadensis Marsh. Canada yew IN (T), KY (T), MD (T), RI (SC), TN (E)
TAFL Taxus floridana Nutt. ex Chapm. Florida yew FL (E)
TEES Tectaria estremeriana Proctor & A.M. Evans Puerto Rico halberd fern E PR (E)
TEFI3 Tectaria fimbriata (Willd.) Proctor & Lourteig least halberd fern FL (E)
TEHE Tectaria heracleifolia (Willd.) Underw. broad halberd fern FL (T)
TEAN Tephrosia angustissima Shuttlw. ex Chapm. narrowleaf hoarypea FL (E)
TEMO3 Tephrosia mohrii (Rydb.) Godfrey pineland hoarypea FL (T)
TESP Tephrosia spicata (Walter) Torr. & A. Gray spiked hoarypea KY (E), MD (E)
TEVI Tephrosia virginiana (L.) Pers. Virginia tephrosia NH (E), RI (SC)
TELU2 Ternstroemia luquillensis Krug & Urb. palo colorado E PR (E)
TESU Ternstroemia subsessilis (Britton) Kobuski el yunque colorado E PR (E)
TEHE2 Tetragonotheca helianthoides L. pineland nerveray TN (PX, E)
TELU Tetragonotheca ludoviciana (Torr. & A. Gray) A. Gray ex H.M. Hall Louisiana nerveray AR (E)
TEAR3 Tetramolopium arenarium (A. Gray) Hillebr. Maui tetramolopium E
TECA7 Tetramolopium capillare (Gaudich.) H. St. John pamakani E
TEFI2 Tetramolopium filiforme Sherff ridgetop tetramolopium E
TELEL2 Tetramolopium lepidotum (Less.) Sherff ssp. lepidotum Waianae Range tetramolopium E
TERE3 Tetramolopium remyi (A. Gray) Hillebr. Awalua Ridge tetramolopium E
TERO Tetramolopium rockii Sherff dune tetramolopium T
TEHE4 Tetraneuris herbacea Greene eastern fournerved daisy
HYHE4 Hymenoxys herbacea (Greene) Cusick T IL (E), MI (E), OH (E)
TEGY Tetraplasandra gymnocarpa (Hillebr.) Sherff Koolau Range 'ohe E
TEBI Tetrazygia bicolor (Mill.) Cogn. Florida clover ash FL (T)
TECAC Teucrium canadense L. var. canadense Canada germander
TECAV Teucrium canadense L. var. virginicum (L.) Eaton NH (E)
THDE Thalia dealbata Fraser ex Roscoe powdery alligator-flag IL (E)
THAR Thalictrum arkansanum B. Boivin Arkansas meadow-rue AR (T)
THCO5 Thalictrum cooleyi H.E. Ahles Cooley's meadow-rue E FL (E), GA (E), NC (E)
THCO2 Thalictrum coriaceum (Britton) Small maid of the mist PA (E), TN (T)
THDA Thalictrum dasycarpum Fisch. & Avé-Lall. purple meadow-rue WA (S)
THDE5 Thalictrum debile Buckley southern meadow-rue GA (T)
THPU2 Thalictrum pubescens Pursh king of the meadow IN (T)
THRE Thalictrum revolutum DC. waxyleaf meadow-rue IA (E), RI (H)
THTH2 Thalictrum thalictroides (L.) Eames & B. Boivin rue anemone FL (E), ME (PX)
ANTH5 Anemonella thalictroides (L.) Spach NH (T), RI (SC)
THVE Thalictrum venulosum Trel. veiny meadow-rue ME (PX), NY (E)
THBA Thaspium barbinode (Michx.) Nutt. hairyjoint meadowparsnip WI (E)
THPI Thaspium pinnatifidum (Buckley) A. Gray cutleaf meadowparsnip KY (T), TN (SC)
THTR Thaspium trifoliatum (L.) A. Gray purple meadowparsnip MD (E)
THHOS2 Thelypodium howellii S. Watson ssp. spectabilis (M. Peck) Al-Shehbaz Howell's thelypody OR (E)
THHOS Thelypodium howellii S. Watson var. spectabilis M. Peck T
THST Thelypodium stenopetalum S. Watson slenderpetal thelypody E CA (E)
THAU Thelypteris augescens (Link) Munz & I.M. Johnst. abrupttip maiden fern FL (T)
THGR Thelypteris grandis A.R. Sm. stately maiden fern FL (E)
THIN3 Thelypteris inabonensis Proctor cordillera maiden fern E PR (E)
THNO Thelypteris noveboracensis (L.) Nieuwl. New York fern IL (E), NY (EV)
THPA Thelypteris palustris Schott eastern marsh fern NY (EV)
THPA5 Thelypteris patens (Sw.) Small ex R.P. St. John gridscale maiden fern FL (E)
THPIA Thelypteris pilosa (M. Martens & Galeotti) Crawford var. alabamensis Crawford Alabama maiden fern T
THRE3 Thelypteris reptans (J.F. Gmel.) Morton creeping maiden fern FL (E)
THRE5 Thelypteris reticulata (L.) Proctor latticevein fern FL (E)
THSC Thelypteris sclerophylla (Poepp. ex Spreng.) Morton stiff maiden fern FL (E)
THSE3 Thelypteris serrata (Cav.) Alston toothed latticevein fern FL (E)
THSI2 Thelypteris simulata (Davenport) Nieuwl. bog fern MD (T), NY (EV), NC (T), TN (PX, E)
THVE2 Thelypteris verecunda Proctor Barrio Charcas maiden fern E PR (E)
THYA Thelypteris yaucoensis Proctor Puerto Rico maiden fern E PR (E)
THFR3 Thermopsis fraxinifolia Nutt. ex M.A. Curtis ashleaf goldenbanner TN (T)
THMA2 Thermopsis macrophylla Hook. & Arn. Santa Inez goldenbanner
THMAA Thermopsis macrophylla Hook. & Arn. var. agnina J.T. Howell CA (R)
THMO2 Thermopsis mollis (Michx.) M.A. Curtis ex A. Gray Allegheny Mountain goldenbanner KY (E)
THMO4 Thrinax morrisii H. Wendl. Key thatch palm FL (E)
THRA2 Thrinax radiata Lodd. ex Schult. & Schult. f. Florida thatch palm FL (E)
THAL8 Thuidium allenii Austin Allen's thuidium moss OH (PRX)
THOC2 Thuja occidentalis L. arborvitae CT (T), IL (T), IN (E), KY (T), MD (T), MA (E), NJ (E), TN (SC)
THTE8 Thymophylla tephroleuca (S.F. Blake) Strother ashy pricklyleaf E TX (E)
THCO9 Thysanocarpus conchuliferus Greene Santa Cruz Island fringepod E
TICO Tiarella cordifolia L. heartleaf foamflower NJ (E), WI (E)
TIAMH Tilia americana L. var. heterophylla (Vent.) Loudon American basswood
TIHE Tilia heterophylla Vent. IL (E)
TIBA2 Tillandsia balbisiana Schult. & Schult. f. northern needleleaf FL (T)
TIFA Tillandsia fasciculata Sw. giant airplant FL (E)
TIFL2 Tillandsia flexuosa Sw. twisted airplant FL (T)
TIPR Tillandsia pruinosa Sw. fuzzywuzzy airplant FL (E)
TIRE Tillandsia recurvata (L.) L. small ballmoss GA (T)
TIUT Tillandsia utriculata L. spreading airplant FL (E)
TIVA2 Tillandsia variabilis Schltdl. leatherleaf airplant
TIVA Tillandsia valenzuelana A. Rich. FL (T)
TIDI Tipularia discolor (Pursh) Nutt. crippled cranefly FL (T), MA (E), MI (T), NY (E), PA (R)
TOPU Tofieldia pusilla (Michx.) Pers. Scotch false asphodel MI (T), MN (E)
TOBA2 Tolumnia bahamensis (Nash ex Britton & Millsp.) G.J. Braem variegated orchid
ONBA Oncidium bahamense Nash ex Britton & Millsp. FL (E)
TONI70 Tomentypnum nitens (Hedw.) Loeske tomentypnum moss OH (E)
TOTA Torreya taxifolia Arn. Florida nutmeg E FL (E), GA (E)
TOPA6 Torreyochloa pallida (Torr.) Church pale false mannagrass KY (E), MD (E), TN (SC)
TOPAP Torreyochloa pallida (Torr.) Church var. pallida pale false mannagrass
PUPA2 Puccinellia pallida (Torr.) R.T. Clausen IL (E)
TOIN4 Tortella inclinata (R. Hedw.) Limpr. tortella moss OH (E)
TOAM3 Tortula ammonsiana H.A. Crum & L.E. Anderson Ammons' tortula moss NC (E), TN (E)
TOFR3 Tortula fragilis Taylor fragile tortula moss TN (E)
TONO2 Tortula norvegica (F. Weber) Wahlenb. ex Lindb. Norwegian tortula moss KY (E)
TOHI Tournefortia hirsutissima L. chiggery grapes FL (E)
TOAP Townsendia aprica S.L. Welsh & Reveal Last Chance Townsend daisy T
TORY Toxicodendron rydbergii (Small ex Rydb.) Greene western poison ivy OH (E)
TOVE Toxicodendron vernix (L.) Kuntze poison sumac KY (E)
TRDI Trachelospermum difforme (Walter) A. Gray climbing dogbane IN (R), MD (E)
TRBR Tradescantia bracteata Small longbract spiderwort IL (T), MI (PREX)
TROH Tradescantia ohiensis Raf. bluejacket PA (E)
TRCO Tragia cordata Michx. heartleaf noseburn IN (R)
TRSA2 Tragia saxicola Small Florida Keys noseburn FL (T)
TRUR2 Tragia urticifolia Michx. nettleleaf noseburn KY (E)
TRCA Trautvetteria caroliniensis (Walter) Vail Carolina bugbane IN (X), PA (R)
TRLA2 Trema lamarckiana (Schult.) Blume Lamarck's trema FL (E)
TRSI5 Trematolobelia singularis H. St. John lavaslope false lobelia E
TRAE2 Trepocarpus aethusae Nutt. ex DC. whitenymph KY (T)
TRTU Triadenum tubulosum (Walter) Gleason lesser marsh St. Johnswort OH (T)
TRVI2 Triadenum virginicum (L.) Raf. Virginia marsh St. Johnswort IL (E)
TRWA Triadenum walteri (J.G. Gmel.) Gleason greater marsh St. Johnswort NJ (E), OH (E)
TRGL5 Triantha glutinosa (Michx.) Baker sticky tofieldia
TOGL2 Tofieldia glutinosa (Michx.) Pers. IL (T), IN (R), NH (T), NY (E), OH (T), VT (T), WI (T)
TRRA6 Triantha racemosa (Walter) Small coastal false asphodel
TORA Tofieldia racemosa (Walter) Britton, Sterns & Poggenb. MD (E, X), NJ (E), TN (E)
TRTR8 Trichilia triacantha Urb. bariaco E PR (E)
TRMA19 Trichocentrum maculatum (Aubl.) M.W. Chase Cape Sable orchid
ONLU Oncidium luridum auct. non Lindl. FL (E)
TRBO Trichomanes boschianum Sturm Appalachian bristle fern AR (T), IL (E), IN (E), NC (T), OH (E), TN (T)
TRHO3 Trichomanes holopterum Kunze entirewing bristle fern FL (E)
TRIN13 Trichomanes intricatum Farrar weft fern CT (SC), MA (E), NJ (E), NY (E)
TRKR Trichomanes krausii Hook. & Grev. treemoss bristle fern FL (E)
TRLI Trichomanes lineolatum (Bosch) Hook. lined bristle fern FL (E)
TRPE2 Trichomanes petersii A. Gray dwarf bristle fern AR (T), NC (T), TN (T)
TRPU5 Trichomanes punctatum Poir. dotted bristle fern FL (E)
TRAL7 Trichophorum alpinum (L.) Pers. alpine bulrush
SCHU2 Scirpus hudsonianus (Michx.) Fernald CT (SC), RI (H)
TRCE3 Trichophorum cespitosum (L.) Hartm. tufted bulrush TN (E)
SCCE2 Scirpus cespitosus L. IL (E), NY (T), WI (T)
TRCL4 Trichophorum clintonii (A. Gray) S.G. Sm. Clinton's bulrush ME (SC)
SCCL2 Scirpus clintonii A. Gray NY (E)
TRPL6 Trichophorum planifolium (Spreng.) Palla bashful bulrush
SCVE Scirpus verecundus Fernald IL (E), KY (E), VT (E)
TRAUC Trichostema austromontanum F.H. Lewis ssp. compactum F.H. Lewis San Jacinto bluecurls T
TRBR5 Trichostema brachiatum L. fluxweed MA (E), MI (T)
ISBR3 Isanthus brachiatus (L.) Britton, Sterns & Poggenb. CT (SC), NJ (E)
TRDI2 Trichostema dichotomum L. forked bluecurls IN (R), MI (T)
TRMI3 Trichostema micranthum A. Gray smallflower bluecurls AZ (SR)
TRSE5 Trichostema setaceum Houtt. narrowleaf bluecurls KY (E), NY (E), PA (E)
TRDIL Trichostema dichotomum L. var. lineare (Walter) Pursh OH (E)
TROC2 Trichostigma octandrum (L.) H. Walt. hoopvine FL (E)
TRFLC Tridens flavus (L.) Hitchc. var. chapmanii (Small) Shinners Chapman's tridens NJ (E)
TRBO2 Trientalis borealis Raf. starflower GA (E), IL (T), KY (E), TN (T)
TRAM3 Trifolium amoenum Greene showy Indian clover E
TRCA26 Trifolium calcaricum J.L. Collins & T.F. Wieboldt running glade clover TN (E)
TRDO Trifolium douglasii House Douglas' clover WA (S)
TROW Trifolium owyheense Gilkey Owyhee clover OR (E)
TRPL2 Trifolium plumosum Douglas ex Hook. plumed clover WA (S)
TRRE2 Trifolium reflexum L. buffalo clover IL (E), KY (E), MD (E, X), OH (E), PA (X), TN (E)
TRREG Trifolium reflexum L. var. glabrum Loja. IN (E)
TRST4 Trifolium stoloniferum Muhl. ex Eaton running buffalo clover E IN (E), KY (T), MO (E), OH (E)
TRTH2 Trifolium thompsonii Morton Thompson's clover WA (T)
TRTR Trifolium trichocalyx A. Heller Monterey clover E CA (E)
TRVA Trifolium variegatum Nutt. whitetip clover
TRPO3 Trifolium polyodon Greene CA (R)
TRVI3 Trifolium virginicum Small ex Small & Vail Kates Mountain clover MD (T), PA (E)
TRGA4 Triglochin gaspensis Lieth & D. Löve Gaspé Peninsula arrowgrass
TRGA3 Triglochin gaspense Lieth & D. Löve, orth. var. ME (PX)
TRMA20 Triglochin maritima L. seaside arrowgrass
TRMA4 Triglochin maritimum L., orth. var. IL (T), IA (T), NJ (E), OH (T)
TRPA28 Triglochin palustris L. marsh arrowgrass
TRPA6 Triglochin palustre L., orth. var. IL (T), IN (T), IA (T), NY (T), PA (X), RI (H)
TRST16 Triglochin striata Ruiz & Pav. three-rib arrowgrass
TRST6 Triglochin striatum Ruiz & Pav., orth. var. MD (E)
TRCE Trillium cernuum L. whip-poor-will flower IL (E), NY (EV), OH (PRX)
TRCEM Trillium cernuum L. var. macranthum Eames & Wiegand IN (E)
TRDE3 Trillium decumbens Harbison trailing wakerobin TN (E)
TRDI5 Trillium discolor Wray ex Hook. mottled wakerobin NC (T)
TRER3 Trillium erectum L. red trillium IL (E), NY (EV), RI (T)
TRFL6 Trillium flexipes Raf. nodding wakerobin MD (E), NY (E)
TRGR4 Trillium grandiflorum (Michx.) Salisb. white trillium ME (E), NY (EV)
TRLA15 Trillium lancifolium Raf. lanceleaf wakerobin FL (E), TN (E)
TRNI2 Trillium nivale Riddell snow trillium KY (E), MD (E), MI (T), PA (R), WI (T)
TRPA11 Trillium parviflorum Soukup smallflower wakerobin WA (S)
TRPE7 Trillium persistens Duncan persistent wakerobin E GA (E)
TRPU3 Trillium pusillum Michx. dwarf wakerobin NC (E)
TRPUO Trillium pusillum Michx. var. ozarkanum (Palmer & Steyerm.) Steyerm. Ozark wakerobin KY (E), TN (E)
TRPUP2 Trillium pusillum Michx. var. pusillum dwarf wakerobin KY (E), TN (E)
TRPUV Trillium pusillum Michx. var. virginianum Fernald Virginia wakerobin MD (T)
TRRE5 Trillium recurvatum Beck bloody butcher MI (T)
TRRE6 Trillium reliquum J.D. Freeman Confederate wakerobin E GA (E)
TRRU2 Trillium rugelii Rendle illscented wakerobin TN (E)
TRSE2 Trillium sessile L. toadshade MI (T), NY (E)
TRUN Trillium undulatum Willd. painted trillium KY (T), MI (E), NY (EV), OH (E)
TRVI4 Trillium viride Beck wood wakerobin IL (E), MI (PREX)
TRAN3 Triosteum angustifolium L. yellowfruit horse-gentian CT (SC), MD (E), NJ (E), PA (E)
TRAU4 Triosteum aurantiacum E.P. Bicknell orangefruit horse-gentian ME (E), NH (E), RI (SC)
TRPE5 Triosteum perfoliatum L. feverwort MA (E), RI (SC)
TRAM18 Triphora amazonica Schltr. broadleaf noddingcaps
TRLA17 Triphora latifolia Luer f. FL (E)
TRCR4 Triphora craigheadii Luer Craighead's noddingcaps FL (E)
TRTR3 Triphora trianthophora (Sw.) Rydb. threebirds CT (SC), FL (T), ME (T), MD (E, X), MA (E), MI (T), NH (T), NJ (E), NY (E), OH (T), PA (E), VT (T)
TRPU4 Triplasis purpurea (Walter) Chapm. purple sandgrass KY (H), PA (E)
TRDA3 Tripsacum dactyloides (L.) L. eastern gamagrass MA (E), NY (T), PA (E), RI (SC)
TRFL4 Tripsacum floridanum Porter ex Vasey Florida gamagrass FL (T)
TRME3 Trisetum melicoides (Michx.) Vasey ex Scribn. purple false oat ME (E), NY (E), WI (E)
TRSP2 Trisetum spicatum (L.) K. Richt. spike trisetum PA (E), WI (T)
TRSPM6 Trisetum spicatum (L.) K. Richt. var. molle (Kunth) Beal CT (SC), NC (E)
TRSPP Trisetum spicatum (L.) K. Richt. var. pilosiglume Fernald NH (E)
TRTRM Trisetum triflorum (Bigelow) Á. Löve & D. Löve ssp. molle (Kunth) Á. Löve & D. Löve MA (E)
TRLE4 Triteleia lemmoniae (S. Watson) Greene Oak Creek triteleia AZ (SR)
TRPA9 Triteleiopsis palmeri (S. Watson) Hoover Palmer's Bajalily AZ (SR)
TRLA14 Trollius laxus Salisb. American globeflower CT (E), OH (E), PA (E)
TRLAL Trollius laxus Salisb. ssp. laxus American globeflower NJ (E), NY (R)
TRPO5 Tropidia polystachya (Sw.) Ames young palm orchid FL (E)
TSCA2 Tsuga caroliniana Engelm. Carolina hemlock TN (T)
TSME Tsuga mertensiana (Bong.) Carričre mountain hemlock NV (CY)
TUGR Tuctoria greenei (Vasey) J. Reeder awnless spiralgrass E CA (R)
TUMU Tuctoria mucronata (Crampton) J. Reeder prickly spiralgrass E CA (E)
TUMA Tumamoca macdougalii Rose Tumamoc globeberry AZ (SR)
ULCR Ulmus crassifolia Nutt. cedar elm TN (SC)
ULRU Ulmus rubra Muhl. slippery elm ME (PX), RI (SC)
ULSE Ulmus serotina Sarg. September elm KY (SC)
ULTH Ulmus thomasii Sarg. rock elm IL (E), NY (T), OH (T)
UMTO60 Umbilicaria torrefacta (Lightf.) Schrad. navel lichen MN (E)
URKA Urera kaalae Wawra opuhe E
URCH3 Urtica chamaedryoides Pursh heartleaf nettle IL (T), OH (E)
UTCO Utricularia cornuta Michx. horned bladderwort IL (E), IN (T), OH (E), TN (SC)
UTGE Utricularia geminiscapa Benj. hiddenfruit bladderwort IN (E), OH (E), RI (SC)
UTGI Utricularia gibba L. humped bladderwort RI (SC)
UTBI Utricularia biflora Lam. CT (SC), MD (E), NJ (E), RI (T)
UTFI Utricularia fibrosa Walter PA (X)
UTIN Utricularia inflata Walter swollen bladderwort MD (E), MI (E), NY (E), TN (SC)
UTIN2 Utricularia intermedia Hayne flatleaf bladderwort IL (E), OH (T), PA (T), RI (SC), WA (S)
UTJU Utricularia juncea Vahl southern bladderwort NY (T)
UTMA Utricularia macrorhiza Leconte common bladderwort KY (E)
UTMI Utricularia minor L. lesser bladderwort IL (E), IN (E), NJ (E), NY (T), PA (T), RI (H)
UTOL Utricularia olivacea C. Wright ex Griseb. piedmont bladderwort NJ (E), NC (T)
UTPU Utricularia purpurea Walter eastern purple bladderwort IN (R), MD (T), PA (R)
UTRA Utricularia radiata Small little floating bladderwort IN (E), NY (T), PA (E)
UTRE Utricularia resupinata B.D. Greene ex Bigelow lavender bladderwort CT (E), IN (X), ME (E), MD (E), MA (T), NJ (E), PA (X), RI (SC), TN (SC), VT (T)
UTST Utricularia striata Leconte ex Torr. striped bladderwort MA (T), NY (T)
UTFI3 Utricularia fibrosa Britton CT (SC), MD (E)
UTSU Utricularia subulata L. zigzag bladderwort IN (T), MA (SC), MI (T), RI (SC), TN (T)
UVFL Uvularia floridana Chapm. Florida bellwort FL (E)
UVGR Uvularia grandiflora Sm. largeflower bellwort CT (E), NH (E)
UVPE Uvularia perfoliata L. perfoliate bellwort IN (E), NH (E)
UVPU2 Uvularia puberula Michx. mountain bellwort PA (R)
UVPUN2 Uvularia puberula Michx. var. nitida (Britton) Fernald NJ (E), NY (E)
VAAN Vaccinium angustifolium Aiton lowbush blueberry IA (T)
VABO Vaccinium boreale I.V. Hall & Aalders northern blueberry ME (T), NY (T)
VACE Vaccinium cespitosum Michx. dwarf bilberry MI (T), NY (E), WI (E)
VACO Vaccinium corymbosum L. highbush blueberry IL (E)
VAEL Vaccinium elliottii Chapm. Elliott's blueberry TN (E)
VAMA Vaccinium macrocarpon Aiton cranberry IL (E), TN (T)
VAMY Vaccinium myrtilloides Michx. velvetleaf huckleberry CT (SC), IN (E), IA (T), OH (T), WA (S)
VAOX Vaccinium oxycoccos L. small cranberry IL (E), IN (T), MD (T), OH (T)
VAST Vaccinium stamineum L. deerberry VT (E)
VAUL Vaccinium uliginosum L. bog blueberry MI (T), MN (T), NY (R)
VAVI Vaccinium vitis-idaea L. lingonberry MI (E)
VAVIM Vaccinium vitis-idaea L. ssp. minus (Lodd.) Hultén northern mountain cranberry MA (E), WI (E)
VAVIM2 Vaccinium vitis-idaea L. var. minus Lodd. CT (SC)
VAAT2 Vahlodea atropurpurea (Wahlenb.) Fr. ex Hartm. mountain hairgrass ME (PX)
VAED Valeriana edulis Nutt. ex Torr. & A. Gray tobacco root IN (E)
VAEDC Valeriana edulis Nutt. ex Torr. & A. Gray var. ciliata (Torr. & A. Gray) Cronquist tobacco root MI (T), MN (T)
VACI Valeriana ciliata Torr. & A. Gray OH (E)
VAPA2 Valeriana pauciflora Michx. largeflower valerian MD (E)
VAUL2 Valeriana uliginosa (Torr. & A. Gray) Rydb. mountain valerian IL (E), IN (E), ME (SC), NH (E), NY (E), OH (PRX), VT (E)
VASIU Valeriana sitchensis Bong. ssp. uliginosa (Torr. & A. Gray) F.G. Mey. WI (T)
VACH Valerianella chenopodiifolia (Pursh) DC. goosefoot cornsalad IL (E), IN (E), MD (E), MI (T), NY (E)
VARA Valerianella radiata (L.) Dufr. beaked cornsalad NJ (E)
VARAF Valerianella radiata (L.) Dufr. var. fernaldii Dyal CT (SC)
VAUM Valerianella umbilicata (Sull.) Alph. Wood navel cornsalad IL (E), MD (E, X), MI (T), NJ (E), NY (E)
VAAN3 Vallesia antillana Woodson tearshrub FL (E)
VAAM3 Vallisneria americana Michx. American eelgrass KY (SC)
VABA Vanilla barbellata Rchb. f. wormvine orchid FL (E)
VADI2 Vanilla dilloniana Correll leafless vanilla FL (E)
VAME2 Vanilla mexicana Mill. Mexican vanilla FL (E)
VAPH Vanilla phaeantha Rchb. f. leafy vanilla FL (E)
VACAP Vauquelinia californica (Torr.) Sarg. ssp. pauciflora (Standl.) Hess & Henrickson Arizona rosewood
VAPA8 Vauquelinia pauciflora Standl. AZ (SR)
VECA2 Veratrum californicum Durand California false hellebore AZ (SR)
VEIN Veratrum insolitum Jeps. Siskiyou false hellebore WA (S)
VELA11 Veratrum latifolium (Desr.) Zomlefer slender bunchflower
MEHY3 Melanthium hybridum Walter CT (SC)
MELA4 Melanthium latifolium Desr. MD (E), TN (E)
VEPA3 Veratrum parviflorum Michx. Appalachian bunchflower
MEPA2 Melanthium parviflorum (Michx.) S. Watson KY (E)
VEVI5 Veratrum virginicum (L.) W.T. Aiton Virginia bunchflower
MEVI2 Melanthium virginicum L. IL (T), IN (E), KY (E), NJ (E), NY (E), OH (T), TN (E)
VEWO3 Veratrum woodii J.W. Robbins ex Alph. Wood Wood's bunchflower FL (E), IL (T), IA (T), OH (T)
MEWO Melanthium woodii (J.W. Robbins ex Alph. Wood) Bodkin GA (R), KY (T), TN (E)
VECA9 Verbena californica Moldenke Red Hills vervain T CA (T)
VESI Verbena simplex Lehm. narrowleaf vervain CT (SC), MA (E), NJ (E)
VEUR Verbena urticifolia L. white vervain ME (PX)
VEAL Verbesina alternifolia (L.) Britton ex Kearney wingstem NY (T)
VECH2 Verbesina chapmanii J.R. Coleman Chapman's crownbeard FL (T)
VEDI Verbesina dissita A. Gray bigleaf crownbeard T CA (T)
VEOC Verbesina occidentalis (L.) Walter yellow crownbeard OH (E)
VEGI Vernonia gigantea (Walter) Trel. giant ironweed NY (E)
VEGL Vernonia glauca (L.) Willd. broadleaf ironweed NJ (E), PA (E)
VEMI2 Vernonia missurica Raf. Missouri ironweed OH (E)
VENO Vernonia noveboracensis (L.) Michx. New York ironweed KY (SC), OH (PRX)
VEPR Vernonia proctori Urbatsch Proctor's ironweed E PR (E)
VEAM2 Veronica americana Schwein. ex Benth. American speedwell IL (E), IN (X), KY (H), TN (SC)
VEAN2 Veronica anagallis-aquatica L. water speedwell IN (T)
VECA7 Veronica catenata Pennell MA (E), NJ (E), TN (E)
VESC2 Veronica scutellata L. skullcap speedwell IL (T), MD (E), TN (E)
VEWO2 Veronica wormskjoldii Roem. & Schult. American alpine speedwell ME (E), NH (E)
VEVI4 Veronicastrum virginicum (L.) Farw. Culver's root MA (T), NY (T), VT (E)
VIBR2 Viburnum bracteatum Rehder bracted arrowwood GA (E), TN (E)
VIDEV Viburnum dentatum L. var. venosum (Britton) Gleason southern arrowwood NY (T)
VIED Viburnum edule (Michx.) Raf. squashberry ME (SC), MI (T), NY (T), VT (T), WI (E)
VILA11 Viburnum lantanoides Michx. hobblebush KY (E)
VIAL3 Viburnum alnifolium Marsh. NJ (E), RI (SC)
VIMO Viburnum molle Michx. softleaf arrowwood IL (T), IN (R), KY (T), OH (E)
VINU Viburnum nudum L. possumhaw CT (SC), KY (E), PA (E)
VINUC Viburnum nudum L. var. cassinoides (L.) Torr. & A. Gray withe-rod
VICA Viburnum cassinoides L. IN (E)
VINUN Viburnum nudum L. var. nudum possumhaw NY (E), RI (T)
VIOPA2 Viburnum opulus L. var. americanum Aiton American cranberrybush IN (E), OH (T)
VITR8 Viburnum trilobum Marsh. PA (R)
VIPR Viburnum prunifolium L. blackhaw CT (SC)
VIRA Viburnum rafinesqueanum Schult. downy arrowwood MA (E), NH (E)
VIRAR Viburnum rafinesqueanum Schult. var. rafinesqueanum KY (T)
VIAM Vicia americana Muhl. ex Willd. American vetch MD (E, X)
VICA2 Vicia caroliniana Walter Carolina vetch NJ (E)
VIME Vicia menziesii Spreng. Hawai'i vetch E
VIOC80 Vicia ocalensis Godfrey & Kral Ocala vetch FL (E)
VIOW Vigna owahuensis Vogel Oahu cowpea E
VIAD Viola adunca Sm. hookedspur violet MA (E)
VIAF2 Viola affinis Leconte sand violet NH (E)
VIBLP Viola blanda Willd. var. palustriformis A. Gray sweet white violet
VIIN Viola incognita Brainerd IL (E), IA (E)
VIBR Viola brittoniana Pollard northern coastal violet CT (E), ME (PX), MA (T), PA (E)
VIBRB Viola brittoniana Pollard var. brittoniana northern coastal violet NY (E)
VICA4 Viola canadensis L. Canadian white violet CT (T), IL (E), ME (E), NJ (E), RI (H)
VICHC Viola chamissoniana Gingins ssp. chamissoniana olopu E
VIEG Viola egglestonii Brainerd glade violet IN (E)
VISEE Viola septemloba Leconte ssp. egglestonii (Brainerd) McKinney KY (SC)
VIEP Viola epipsila Ledeb. dwarf marsh violet MI (T)
VIHE2 Viola helenae Forbes & Lydgate Wahiawa stream violet E
VIHI2 Viola hirsutula Brainerd southern woodland violet CT (SC), IN (X), NY (E)
VIKAW Viola kauaensis A. Gray var. wahiawaensis Forbes pohe hiwa E
VILA10 Viola labradorica Schrank alpine violet
VICO2 Viola conspersa Rchb. IL (T)
VILA17 Viola lanaiensis Becker Hawai'i violet E
VILA4 Viola lanceolata L. bog white violet MN (T), VT (T)
VIMI3 Viola missouriensis Greene Missouri violet OH (E)
VINE Viola nephrophylla Greene northern bog violet CT (SC), MA (E), NH (T), NY (E), OH (E)
VINO Viola novae-angliae House New England blue violet ME (SC), MI (T), NY (E)
VINU2 Viola nuttallii Pursh Nuttall's violet MN (T)
VIOA Viola oahuensis Forbes Oahu violet E
VIPA18 Viola ×palmata L. (pro sp.) [brittoniana or pedatifida × affinis or sororia] early blue violet
VIPA3 Viola palmata L. ME (PX), NH (E), RI (T)
VIPA4 Viola palustris L. marsh violet ME (E), NH (T)
VIPE Viola pedata L. birdfoot violet NY (EV), OH (T)
VIPEL Viola pedata L. var. lineariloba DC. NH (T)
VIPE2 Viola pedatifida G. Don prairie violet IN (T), MI (T), OH (E), PA (E)
VIPR4 Viola ×primulifolia L. (pro sp.) [lanceolata × macloskeyi] IL (E), IN (R), NY (T), OH (E)
VIPU3 Viola pubescens Aiton downy yellow violet RI (SC)
VIRE2 Viola renifolia A. Gray white violet IA (T), PA (X), WA (S)
VIREB Viola renifolia A. Gray var. brainerdii (Greene) Fernald CT (SC)
VIRO2 Viola rotundifolia Michx. roundleaf yellow violet RI (SC)
VISAO Viola sagittata Aiton var. ovata (Nutt.) Torr. & A. Gray arrowleaf violet
VIFI Viola fimbriatula Sm. WI (E)
VISE2 Viola selkirkii Pursh ex Goldie Selkirk's violet CT (SC)
VISE5 Viola septentrionalis Greene northern woodland violet NJ (E)
VIST3 Viola striata Aiton striped cream violet CT (SC)
VITR4 Viola tripartita Elliot threepart violet FL (E), OH (PRX), PA (X), TN (SC)
VITRG Viola tripartita Elliot var. glaberrima (DC.) Harper OH (E)
VIVI10 Viola ×viarum Pollard [missouriensis or nephrophylla × pedatifida] twoflower violet
VIVI2 Viola viarum Pollard IL (E)
VIWA Viola walteri House prostrate blue violet KY (T), OH (E)
VIAE Vitis aestivalis Michx. summer grape ME (E)
VICIB Vitis cinerea (Engelm.) Engelm. ex Millard var. baileyana (Munson) Comeaux graybark grape PA (E)
VILA8 Vitis labrusca L. fox grape KY (SC)
VINO2 Vitis ×novae-angliae Fernald (pro sp.) [labrusca × riparia] pilgrim grape CT (SC), MD (E, X), PA (E)
VIPA7 Vitis palmata Vahl catbird grape IN (R)
VIRU2 Vitis rupestris Scheele sand grape IN (E), KY (T), PA (E), TN (SC, PE)
VIVU Vitis vulpina L. frost grape MI (T), NY (E)
VIAP2 Vittaria appalachiana Farrar & Mickel Appalachian shoestring fern IN (R), NY (E), PA (T)
VOPA Voyria parasitica (Schltdl. & Cham.) Ruyters & Maas parasitic ghostplant
LEPA9 Leiphaimos parasitica Schltdl. & Cham. FL (E)
VUEL Vulpia elliotea (Raf.) Fernald squirreltail fescue NJ (E)
VUOC Vulpia octoflora (Walter) Rydb. sixweeks fescue VT (E)
VUOCG Vulpia octoflora (Walter) Rydb. var. glauca (Nutt.) Fernald sixweeks fescue
FEOCT2 Festuca octoflora Walter var. tenella (Willd.) Fernald NH (E)
WAFR Waldsteinia fragarioides (Michx.) Tratt. Appalachian barren strawberry CT (SC), IL (E), IN (R), ME (E), MA (SC), NH (T)
WALO Waldsteinia lobata (Baldw.) Torr. & A. Gray piedmont barren strawberry GA (T)
WAAM Warea amplexifolia (Nutt.) Nutt. wideleaf pinelandcress E FL (E)
WACA Warea carteri Small Carter's pinelandcress E FL (E)
WAFI Washingtonia filifera (Linden ex André) H. Wendl. California fan palm AZ (SR)
WIHO3 Wilkesia hobdyi H. St. John dwarf iliau E
WIFR Wisteria frutescens (L.) Poir. American wisteria MI (T)
WIMA Wisteria macrostachya (Torr. & A. Gray) Nutt. ex B.L. Rob. & Fernald IN (R)
WOBR Wolffia brasiliensis Weddell Brazilian watermeal
WOPA Wolffia papulifera C.H. Thomp. MI (T)
WOCO Wolffia columbiana Karst. Columbian watermeal ME (T)
WOGL2 Wolffiella gladiata (Hegelm.) Hegelm. Florida mudmidget OH (T), PA (R)
WOFL Wolffiella floridana (Donn. Sm.) C.H. Thomp. IN (X), MD (E, X), NJ (E)
WOAL Woodsia alpina (Bolton) Gray alpine woodsia ME (T), MI (T), NY (E), VT (E)
WOAP Woodsia appalachiana T.M.C. Taylor Appalachian cliff fern KY (E)
WOSCA2 Woodsia scopulina D.C. Eaton ssp. appalachiana (T.M.C. Taylor) Windham TN (SC)
WOGL Woodsia glabella R. Br. ex Richardson smooth woodsia ME (T), MA (E), MN (T), NH (E), NY (E)
WOIL Woodsia ilvensis (L.) R. Br. rusty woodsia IL (E), IA (E), MD (T), NY (EV), OH (PRX), RI (H)
WOOB2 Woodsia obtusa (Spreng.) Torr. bluntlobe cliff fern ME (T), MI (T), NH (T), NY (EV)
WOOR Woodsia oregana D.C. Eaton Oregon cliff fern IA (T)
WOSC Woodsia scopulina D.C. Eaton Rocky Mountain woodsia MN (T)
WOAR Woodwardia areolata (L.) T. Moore netted chainfern IN (R), ME (PX), MI (PREX), NH (E), NY (EV), PA (T)
WOFI Woodwardia fimbriata Sm. giant chainfern WA (S)
WOVI Woodwardia virginica (L.) Sm. Virginia chainfern NY (EV), TN (SC), VT (T)
XASI Xanthorhiza simplicissima Marsh. yellowroot FL (E)
XEAS Xerophyllum asphodeloides (L.) Nutt. eastern turkeybeard GA (R), KY (H), TN (T)
XYCR Xylosma crenata (H. St. John) H. St. John sawtooth logwood E
XYAM Xyris ambigua Bey. ex Kunth coastal plain yelloweyed grass TN (E)
XYBA Xyris baldwiniana Schult. Baldwin's yelloweyed grass AR (T)
XYCA Xyris caroliniana Walter Carolina yelloweyed grass NJ (E)
XYDI Xyris difformis Chapm. bog yelloweyed grass IN (T), KY (E), OH (E)
XYFI Xyris fimbriata Elliot fringed yelloweyed grass MD (E), NJ (E), TN (E)
XYIS Xyris isoetifolia Kral quillwort yelloweyed grass FL (E)
XYLAI Xyris laxifolia Mart. var. iridifolia (Chapm.) Kral irisleaf yelloweyed grass TN (SC)
XYLO Xyris longisepala Kral Kral's yelloweyed grass FL (E)
XYMO Xyris montana Ries northern yelloweyed grass CT (E), NJ (E), PA (R), RI (T), VT (T)
XYSC Xyris scabrifolia Harper Harper's yelloweyed grass FL (T)
XYCH Xyris chapmanii Bridges & Orzell FL (E)
XYSM Xyris smalliana Nash Small's yelloweyed grass CT (E), ME (E), MD (E)
XYTE Xyris tennesseensis Kral Tennessee yelloweyed grass E GA (E), TN (E)
XYTO Xyris torta Sm. slender yelloweyed grass IA (E), MN (E), OH (E), PA (T)
YEXA Yermo xanthocephalus Dorn desert yellowhead T
YUANA2 Yucca angustissima Engelm. ex Trel. var. angustissima narrowleaf yucca AZ (SR)
YUANK Yucca angustissima Engelm. ex Trel. var. kanabensis (McKelvey) Reveal Kanab yucca AZ (SR)
YUBA Yucca baccata Torr. banana yucca
YUBAB Yucca baccata Torr. var. baccata AZ (SR, HR), NV (CY)
YUBAV Yucca baccata Torr. var. vespertina McKelvey AZ (SR), NV (CY)
YUBAI Yucca baileyi Woot. & Standl. var. intermedia (McKelvey) Reveal intermediate yucca AZ (SR)
YUBRB Yucca brevifolia Engelm. var. brevifolia Joshua tree AZ (SR), NV (CY)
YUBRJ Yucca brevifolia Engelm. var. jaegeriana McKelvey Jaeger's Joshua tree AZ (SR), NV (CY)
YUEL Yucca elata (Engelm.) Engelm. soaptree yucca
YUELE Yucca elata (Engelm.) Engelm. var. elata AZ (SR)
YUELU Yucca elata (Engelm.) Engelm. var. utahensis (McKelvey) Reveal AZ (SR), NV (CY)
YUELV Yucca elata (Engelm.) Engelm. var. verdiensis (McKelvey) Reveal AZ (SR)
YUGL2 Yucca gloriosa L. moundlily yucca FL (E)
YUHA Yucca harrimaniae Trel. Spanish bayonet AZ (SR)
YUHAH Yucca harrimaniae Trel. var. harrimaniae Spanish bayonet NV (CY)
YUSC2 Yucca schidigera Roezl ex Ortgies Mojave yucca AZ (SR, HR), NV (CY)
YUSC Yucca ×schottii Engelm. (pro sp.) [baccata × elata] Schott's yucca AZ (SR)
YUAR Yucca arizonica McKelvey AZ (SR)
YUTH2 Yucca thornberi McKelvey AZ (SR)
ZAMIA Zamia L. zamia FL (CE)
ZAPA Zannichellia palustris L. horned pondweed IN (E), ME (SC), NH (T)
ZAAM Zanthoxylum americanum Mill. common pricklyash FL (E), MD (E), NH (E), TN (SC)
ZACO Zanthoxylum coriaceum A. Rich. Biscayne pricklyash FL (E)
ZADIT Zanthoxylum dipetalum H. Mann var. tomentosum Rock kawa'u E
ZAFL Zanthoxylum flavum Vahl West Indian satinwood FL (E)
ZAHA Zanthoxylum hawaiiense Hillebr. Hawai'i pricklyash E
ZATH Zanthoxylum thomasianum (Krug & Urb.) Krug & Urb. ex P. Wilson St. Thomas pricklyash E PR (E)
ZEAT Zephyranthes atamasca (L.) Herbert Atamasco lily FL (T), MD (E)
ZEATT Zephyranthes atamasca (L.) Herbert var. treatiae (S. Watson) Meerow Atamasco lily
ZETR Zephyranthes treatiae S. Watson FL (T)
ZELO Zephyranthes longifolia Hemsl. copper zephyrlily AZ (SR)
ZESI Zephyranthes simpsonii Chapm. redmargin zephyrlily FL (T)
ZIEL2 Zigadenus elegans Pursh mountain deathcamas AZ (SR)
ZIELG Zigadenus elegans Pursh ssp. glaucus (Nutt.) Hultén mountain deathcamas NY (T)
ZIELG2 Zigadenus elegans Pursh var. glaucus (Nutt.) Cronquist IN (R), PA (E)
ZIGL2 Zigadenus glaucus Nutt. IL (E), TN (E)
ZILE Zigadenus leimanthoides A. Gray pine barren deathcamas FL (E), NJ (E), TN (T)
ZIPA2 Zigadenus paniculatus (Nutt.) S. Watson foothill deathcamas AZ (SR)
ZIVI Zigadenus virescens (Kunth) J.F. Macbr. green deathcamas AZ (SR)
ZIAQ Zizania aquatica L. annual wildrice OH (T), PA (R), RI (SC)
ZIAQA2 Zizania aquatica L. var. aquatica annual wildrice MI (T)
ZIPAI Zizania palustris L. var. interior (Fassett) Dore northern wildrice KY (H)
ZITE Zizania texana Hitchc. Texas wildrice E TX (E)
ZIMI Zizaniopsis miliacea (Michx.) Döll & Asch. giant cutgrass KY (T), MD (E)
ZIAP Zizia aptera (A. Gray) Fernald meadow zizia CT (E), IN (R), MI (T), RI (H)
ZIAU Zizia aurea (L.) W.D.J. Koch golden zizia RI (SC)
ZICE Ziziphus celata W.S. Judd & D.W. Hall Florida jujube E FL (E)
 
†CodeProtected Status
CECommercially Exploited
EEndangered
EVExploitably Vulnerable
XExtirpated
FPFully Protected
HSHighly Safeguarded
HHistorical
PXPossibly Extirpated
PRXPresumed Extirpated
PREXProbably Extirpated
CYProtected as a Cactus, Yucca, or Christmas tree
RRare
RIReintroduced
SASalvage Assessed
SRSalvage restricted
SSensitive
SCSpecial Concern
TThreatened
UUnusual
VVulnerable
WLWatch list
 

 

Time Generated: 02/09/2012 05:07 PM CST