Bristly Greenbrier
Smilax tamnoides
Last reviewed: June 2026
Bristly Greenbrier (Smilax tamnoides) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org, last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
part sun
Water
medium
Size
120"–360" H × 48"–240" W
Bloom
May, Jun, Jul
Native to
AL, AR, CT, DE and 29 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Bristly greenbrier is a vigorous native vine that can climb 10-30 feet tall using thorns and tendrils to attach to supports. This deciduous climber produces small greenish flowers in late spring and summer, followed by dark berries that persist into winter. The plant spreads aggressively and can form dense thickets if not managed.
In an HOA neighborhood
Bristly Greenbrier takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Sharp thorns create safety concerns
- Aggressive spreading habit difficult to control
- Can look wild and unkempt without constant pruning
Wildlife value
The flowers attract bees and beetles during the growing season. Birds feed on the dark berries in fall and winter, while the dense growth provides nesting habitat and cover.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Bristly Greenbrier fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.