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Polygonum amphibium L. var. stipulaceum Coleman
water smartweed

General Information
Symbol: POAMS
Group: Dicot
Family: Polygonaceae
Duration: Perennial
Growth Habit: Forb/herb
Native Status: AK   N
L48   N
Data Source and Documentation
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   


click on a thumbnail to view an image, or see all the Polygonum thumbnails at the Plants Gallery

©Gary A. Monroe. United States, CA, El Dorado Co. 1982. Usage Requirements.



Symbol Scientific Name
PEAMS Persicaria amphibia (L.) Gray var. stipulacea (N. Coleman) H. Hara
PEME10 Persicaria mesochora Greene
PENE10 Persicaria nebraskensis Greene
POAML Polygonum amphibium L. ssp. laevimarginatum Hultén
POAMH Polygonum amphibium L. var. hartwrightii (A. Gray) Bissell
POCOR2 Polygonum coccineum Muhl. ex Willd. var. rigidulum (Sheldon) Stanford
POFL12 Polygonum fluitans Eaton
POHA13 Polygonum hartwrightii A. Gray
POIN14 Polygonum inundatum Raf.
PONA3 Polygonum natans Eaton


Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Caryophyllidae
Order Polygonales
Family Polygonaceae – Buckwheat family
Genus Polygonum L. – knotweed
Species Polygonum amphibium L. – water knotweed
Variety Polygonum amphibium L. var. stipulaceum Coleman – water smartweed

Subordinate Taxa

This plant has no children

Legal Status



Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover