Plantae > Tracheophyta > Liliopsida > Liliales > Smilacaceae > Smilax > Smilax rotundifolia

Smilax rotundifolia (Horse Brier)

Synonyms: Smilax caduca; Smilax ciliata; Smilax deltifolia; Smilax deltifolia var. compressa; Smilax engelmanniana; Smilax platoplis; Smilax quadrangularis; Smilax rotundifolia var. caduca; Smilax rotundifolia var. crenulata; Smilax rotundifolia var. engelmanniana; Smilax rotundifolia var. missourensis; Smilax rotundifolia var. parviflora; Smilax rotundifolia var. quadrangularis; Smilax rotundifolia var. sprengelii; Smilax sprengelii; Smilax tetragona

Wikipedia Abstract

Smilax rotundifolia, known as common greenbrier, is a woody vine native to the eastern and south-central United States and to eastern Canada. It is a common and conspicuous part of the natural forest ecosystems in much of its native range. The leaves are glossy green, petioled, alternate, and circular to heart-shaped. They are generally 5–13 cm long. Common greenbriar climbs other plants using green tendrils growing out of the petioles.The stems are round and green and have sharp spines.
View Wikipedia Record: Smilax rotundifolia


Height [3]  39 feet (12 m)
Allergen Potential [1]  Medium-High
Screening - Summer [2]  Porous
Screening - Winter [2]  Porous
Hardiness Zone Minimum [2]  USDA Zone: 3 Low Temperature: -40 F° (-40 C°) → -30 F° (-34.4 C°)
Light Preference [2]  Full Sun
Soil Acidity [2]  Neutral
Soil Fertility [2]  Intermediate
Water Use [2]  Moderate
Flower Color [2]  White
Foliage Color [2]  Green
Fruit Color [2]  Brown
Bloom Period [2]  Spring
Drought Tolerance [2]  Medium
Edible [3]  May be edible. See the Plants For A Future link below for details.
Fire Tolerance [2]  Low
Flower Type [3]  Dioecious
Frost Free Days [2]  6 months 5 days
Fruit/Seed Abundance [2]  Low
Fruit/Seed Begin [2]  Spring
Fruit/Seed End [2]  Summer
Growth Form [2]  Single Crown
Growth Period [2]  Summer
Growth Rate [2]  Slow
Leaf Type [3]  Deciduous
Lifespan [2]  Perennial
Propagation [2]  Bare Root, Container, Seed
Root Depth [2]  12 inches (30 cm)
Seed Spread Rate [2]  Slow
Seed Vigor [2]  Low
Shape/Orientation [2]  Climbing
Structure [3]  Vine
Vegetative Spread Rate [2]  None
View Plants For A Future Record : Smilax rotundifolia

Protected Areas

Name IUCN Category Area acres Location Species Website Climate Land Use
Allegheny Portage Railroad Nat'l Hist. Site National Historic Site III 1152 Pennsylvania, United States
Assateague Island National Seashore II 8621 Maryland, United States
Big South Fork National River and Recreation Area National Recreation Area V 120283 Kentucky, Tennessee, United States
Blue Ridge Parkway National Parkway V 73611 North Carolina, Virginia, United States
Bluestone National Scenic River National River and Wild and Scenic Riverway V 3517 West Virginia, United States
Booker T. Washington National Monument V 237 Virginia, United States
Cape Lookout National Seashore II 18379 North Carolina, United States
Carolinian-South Atlantic Biosphere Reserve 310228 North Carolina, South Carolina, Georgia, United States      
Catoctin Mountain Park National Park II 5994 Maryland, United States
Central Gulf Coastal Plain Biosphere Reserve 40530 United States  
Chattahoochee River National Recreation Area V 7622 Georgia, United States
Chesapeake & Ohio Canal National Hist. Park National Historical Park V 19586 Maryland, District of Columbia, United States
Chickamauga & Chattanooga Nat'l Military Park National Military Park V 8248 Georgia, Tennessee, United States
Colonial National Historic Park National Historical Park V 9316 Virginia, United States
Congaree Swamp National Park II 6095 South Carolina, United States
Coweeta Hydrologic Laboratory LTER Site Long Term Ecological Research   North Carolina, United States
Cumberland Gap National Hist. Park National Historical Park V 24282 Kentucky, Tennessee, Virginia, United States
Fire Island National Seashore V 9433 New York, United States
Fort Donelson National Battlefield III 560 Tennessee, United States
Fort Necessity National Battlefield III 1019 Pennsylvania, United States
Friendship Hill National Historic Site III 697 Pennsylvania, United States
Gateway National Recreation Area V 1807 New Jersey, United States
Gauley River National Recreation Area V 10157 West Virginia, United States
George Washington Birthplace National Monument V 435 Virginia, United States
George Washington Memorial Parkway V   Virginia, United States
Gettysburg National Military Park V 3560 Pennsylvania, United States
Great Smoky Mountains National Park II 515454 North Carolina, Tennessee, United States
Great Swamp National Wildlife Refuge VI 3161 New Jersey, United States
Harpers Ferry National Historical Park VI 715 West Virginia, United States
Hobcaw Barony (North Inlet) National Estuarine Research Reserve 7585 South Carolina, United States
Hopewell Furnace National Historic Site III 861 Pennsylvania, United States
Indiana Dunes National Lakeshore II 8272 Indiana, United States
Johnstown Flood National Memorial VI 175 Pennsylvania, United States
Kejimkujik National Park II 94203 Nova Scotia, Canada
Mammoth Cave Area Biosphere Reserve (Natn'l Park) National Park II 51235 Kentucky, United States
Manassas National Battlefield Park III 5132 Virginia, United States
Moores Creek National Battlefield III 100 North Carolina, United States
Morristown National Historical Park VI 1677 New Jersey, United States
National Capital Region - East National Park   District of Columbia, United States
New Jersey Pinelands Biosphere Reserve   New Jersey, United States  
New River Gorge National River National River and Wild and Scenic Riverway V 55591 West Virginia, United States
Obed Wild and Scenic River National River and Wild and Scenic Riverway V 5268 Tennessee, United States
Oconee National Forest Botanical Reserve 306 Georgia, United States  
Petersburg National Battlefield III 3338 Virginia, United States
Prince William Forest Park 19378 District of Columbia, United States
Richmond National Battlefield Park III 1517 Virginia, United States
Rock Creek Park   District of Columbia, United States
Saratoga National Historical Park   New York, United States
Shenandoah National Park II 108221 Virginia, United States
Shiloh National Military Park III 4061 Tennessee, United States
South Atlantic Coastal Plain Biosphere Reserve 20317 South Carolina, United States  
Southern Appalachian Biosphere Reserve 37548505 North Carolina, Tennessee, United States  
Tennessee River Gorge   Tennessee, United States
Valley Forge National Historical Park VI 3509 Pennsylvania, United States



Aix sponsa (Wood Duck)[4]
Callopistria floridensis (Florida fern caterpillar)[5]
Castor canadensis (american beaver)[4]
Corvus brachyrhynchos (American Crow)[4]
Cymatophora approximaria[5]
Dryocopus pileatus (Pileated Woodpecker)[4]
Ephestiodes infimella[5]
Melanaspis smilacis (Smilax scale)[6]
Phosphila miselioides[5]
Phosphila turbulenta[5]
Phyprosopus callitrichoides (Curve-lined Owlet)[5]
Proleucoptera smilaciella[5]
Acrosternum hilare (Green stinkbug)[4]
Cardinalis cardinalis (Northern Cardinal)[4]
Didelphis virginiana (Virginia Opossum)[4]
Mimus polyglottos (Northern Mockingbird)[4]
Odocoileus virginianus (white-tailed deer)[4]
Procyon lotor (Raccoon)[4]
Sciurus carolinensis (eastern gray squirrel)[4]
Sylvilagus floridanus (Eastern Cottontail)[4]
Turdus migratorius (American Robin)[4]


Parasite of 
Acer rubrum (red maple)[4]
Crataegus viridis (desert hawthorn)[4]


Parasitized by 
Crataegus viridis (desert hawthorn)[4]
Lonicera japonica (Chinese honeysuckle)[4]
Shelter for 
Anas platyrhynchos (Mallard)[4]
Argiope aurantia (black-and-yellow argiope)[4]
Battus philenor (pipevine swallowtail)[4]
Calopteryx maculata (Ebony jewelwing)[4]
Calosoma scrutator (Fiery searcher)[4]
Cicindela sexguttata (Six-spotted Tiger Beetle)[4]
Colinus virginianus (Northern Bobwhite)[4]
Cryptotis parva (North American Least Shrew)[4]
Dermacentor variabilis (American dog tick)[4]
Lymantria dispar (gypsy moth)[4]
Marmota monax (woodchuck)[4]
Mephitis mephitis (Striped Skunk)[4]
Micrathena gracilis (Spined micrathena)[4]
Microtus pennsylvanicus (meadow vole)[4]
Molothrus ater (Brown-headed Cowbird)[4]
Nerodia sipedon (Northern Water Snake)[4]
Peromyscus leucopus (white-footed mouse)[4]
Phidippus audax (Daring Jumping Spider)[4]
Pseudacris crucifer (Spring Peeper)[4]
Pterophylla camellifolia (common true katydid)[4]
Rattus norvegicus (Norway rat)[4]
Spinus tristis (American Goldfinch)[4]
Thryothorus ludovicianus (Carolina Wren)[4]
Triatoma sanguisuga (Eastern blood-sucking cone)[4]
Vulpes vulpes (Red Fox)[4]
Zenaida macroura (Mourning Dove)[4]
Acrosternum hilare (Green stinkbug)[4]
Cardinalis cardinalis (Northern Cardinal)[4]
Didelphis virginiana (Virginia Opossum)[4]
Mimus polyglottos (Northern Mockingbird)[4]
Odocoileus virginianus (white-tailed deer)[4]
Procyon lotor (Raccoon)[4]
Sciurus carolinensis (eastern gray squirrel)[4]
Sylvilagus floridanus (Eastern Cottontail)[4]
Turdus migratorius (American Robin)[4]


E. Canada to C. & E. U.S.A.;



Attributes / relations provided by
1Derived from Allergy-Free Gardening OPALS™, Thomas Leo Ogren (2000)
2USDA Plants Database, U. S. Department of Agriculture
3Plants For A Future licensed under a Creative Commons License
4Study of Northern Virginia Ecology
5HOSTS - a Database of the World's Lepidopteran Hostplants Gaden S. Robinson, Phillip R. Ackery, Ian J. Kitching, George W. Beccaloni AND Luis M. Hernández
6Ben-Dov, Y., Miller, D.R. & Gibson, G.A.P. ScaleNet 4 November 2009
Images provided by Google Image Search
Abstract provided by DBpedia licensed under a Creative Commons License
Weather provided by NOAA METAR Data Access