Greenbriar is a perennial woody vine that often climbs other vegetation. The broad heart-shaped leaves are shiny and have parallel venation and smooth margins. The stems have many sharp prickles along their entire length. Greenbriar can form thickets of vegetation in undisturbed sites, as well as in open landscapes and nursery areas.
Greenbriar is a difficult-to-control perennial woody vine that often climbs other vegetation. Perennial broadleaf weeds are capable of living more than two years.
Growth Season/Life Cycle
has no hairs, but very prominent thorns and prickles
1 to greater than 2 inches
fibrous; very "woody"; may also be found with white rhizomes
yellow; yellowish brown