Roundleaf Greenbrier is a thorny, climbing native vine of eastern forest edges and thickets, with green stems, round glossy leaves, and clusters of dark blue-black berries. Despite its formidable thorns, the berries are an important food for mockingbirds, catbirds, and many other birds. The thorny thickets provide exceptional nesting and escape cover for wildlife.
Best time to see a Roundleaf Greenbrier
The best time to see a Roundleaf Greenbrier is April–August, when about 62% of U.S. sightings happen, based on 21,858 research-grade iNaturalist observations.
Not certain it is a Roundleaf Greenbrier? What plant is this? walks through what to check first and the lookalikes that catch people out.
Recent Roundleaf Greenbrier sightings near you
Live, research-grade observations from iNaturalist. Allow location to center the map on you.
Spotted a Roundleaf Greenbrier?
Point Huck at any plant, bird, or animal and know for sure - plus a live map of where it is being spotted near you.