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Smilax rotundifolia L.
roundleaf greenbrier

General Information
Symbol: SMRO
Group: Monocot
Family: Smilacaceae
Duration: Perennial
Growth Habit: Shrub
Native Status: CAN   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 Smilax thumbnails at the Plants Gallery

Robert H. Mohlenbrock. USDA SCS. 1991. Southern wetland flora: Field office guide to plant species. South National Technical Center, Fort Worth. Provided by USDA NRCS Wetland Science Institute (WSI). Usage Requirements.

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory. United States, MD, Potomac. Usage Requirements.

©Ted Bodner. James H. Miller and Karl V. Miller. 2005. Forest plants of the southeast and their wildlife uses. University of Georgia Press., Athens. Provided by University of Georgia Press. Scanned by Forestry Images. Usage Requirements.

©Nancy Staunton. Provided by Smithsonian Institution, Department of Botany. United States, VA, Woodbridge, Occoquan National Wildlife Refuge. Usage Requirements.

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 1: 528. Provided by Kentucky Native Plant Society. Scanned by Omnitek Inc. Usage Requirements.

USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. Provided by NRCS National Wetland Team. Usage Requirements.



Symbol Scientific Name
SMROC Smilax rotundifolia L. var. crenulata Small & A. Heller
SMROQ Smilax rotundifolia L. var. quadrangularis (Muhl. ex Willd.) Alph. Wood


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 Liliopsida – Monocotyledons
Subclass Liliidae
Order Liliales
Family Smilacaceae – Catbrier family
Genus Smilax L. – greenbrier
Species Smilax rotundifolia L. – roundleaf greenbrier

Subordinate Taxa

This plant has no children

Legal Status

U.S. Weed Information
Smilax rotundifolia
common catbriar
common greenbriar
roundleaf greenbriar
This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
N'EAST Uva, R.H., J.C. Neal,and J.M. DiTomaso. 1997. Weeds of the Northeast. Cornell University Press. Ithaca, New York.

Wetland Status

Interpreting Wetland Status

North America
Atlantic and Gulf Coastal Plain FAC
Eastern Mountains and Piedmont FAC
Great Plains FAC
Midwest FAC
Northcentral & Northeast FAC



Source Large Mammals Small Mammals Water Birds Terrestrial Birds
Miller Low Low Low


Source Large Mammals Small Mammals Water Birds Terrestrial Birds


Miller, J.H., and K.V. Miller. 1999. Forest plants of the southeast and their wildlife uses. Southern Weed Science Society.

Description of Values

Value Class Food Cover
High Average 25-50% of diet Regular source of cover
Low 5-10% of diet Infrequently used as cover
Minor 2-5% of diet Sparsely used as cover
Moderate Average 10-25% of diet Occasional source of cover