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Smilax rotundifolia

A native eastern North American perennial vine with round leaves and thorny, climbing stems that uses tendrils for support and bears blue-black berries in fall, with dioecious flowers requiring both sexes for seed production.

Is Smilax rotundifolia growing in your garden? Record it and all of your plants in Known.

Common Names

Roundleaf Greenbrier, Common Greenbrier

Summary

Smilax rotundifolia is a native woody vine that climbs by tendrils and often forms dense, thorny thickets; leaves are glossy, ovate to heart-shaped with 3–5 prominent veins, and flowers are greenish-yellow followed by blue-black berries that ripen in fall, its habitat spans moist woods, thickets, and roadsides, tolerating sun to semi-shade and moist to dryish soils; hardy in USDA zones 4–9, propagation occurs by seeds and rhizomes, with division also possible; young shoots are edible and roots can be used as a gelling agent, wildlife relies on berries for food, and the dense growth provides cover, though density can be a nuisance in cultivated spaces, earning status as an obnoxious pest in parts of America

Lifecycle

Perennial

Height

16.5-19.5 feet

Spread

360-480 inches

Hardiness Zones

Zones 4-9

Sunlight Requirements

Ideally full Sun; tolerates partial sun or partial shade.

Soil Type

Moist, loamy, slightly acidic, well-drained soil

Soil Drainage

Moist, well-drained soil (moderately moist but not waterlogged)

Soil pH

5.0-6.0

Bloom Color

Greenish white

Bloom Time

Spring to Summer

Foliage Color

Green (glossy green)

Fall Foliage Color

Green

Leaf Lifecycle

Semi-deciduous

Growth Rate

Rapid growth

Seasons of Interest

Spring, Summer, Fall, and Winter

Propagation Methods

Seeds, Division, Cuttings

Attracts Wildlife

Attracts bees, butterflies, and birds

References

Vascular Plants of North Carolina. auth1.dpr.ncparks.gov.
Smilax Species, Bull Briar, Greenbriar, Horse Brie…. davesgarden.com.
Comment grandir Smilax rotundifolia. earthone.io.
Smilax rotundifolia / Species Page. florida.plantatlas.usf.edu.
Smilax rotundifolia (carrion-flower, roundleaf gre…. gobotany.nativeplanttrust.org.
Smilax (Greenbrier) | Home & Garden Information Ce…. hgic.clemson.edu.
Smilax rotundifolia Horse Brier, Roundleaf greenbr…. pfaf.org.
Smilax rotundifolia in Genus Smilax. plantaedb.com.
Smilax rotundifolia - North Carolina Extension Gar…. plants.ces.ncsu.edu.
Roundleaf Greenbrier. plants.vegeworx.com.
Smilax rotundifolia L. | Plants of the World Onlin…. powo.science.kew.org.
Smilax rotundifolia - Useful Temperate Plants. temperate.theferns.info.
Smilax rotundifolia L.. worldfloraonline.org.
Greenbriar, Smilax rotundifolia - Bee Better Natur…. beebetternaturally.com.
roundleaf greenbrier (Smilax rotundifolia) - Botan…. botanicalrealm.com.
Round-leaved greenbrier (Smilax rotundifolia) COSE…. canada.ca.
Smilax rotundifolia - USDA Forest Service. fs.usda.gov.
Roundleaf Greenbrier (Smilax rotundifolia) - Jungl…. jungledragon.com.
Smilax rotundifolia | bamboo briar Climber Wall Sh…. rhs.org.uk.
Smilax rotundifolia - Trees and Shrubs Online. treesandshrubsonline.org.
Smilax rotundifolia (Roundleaf greenbriar) | Nativ…. wildflower.org.
World Flora Online. worldfloraonline.org. June 2024.