Common Name: greenbriar, roundleaf
Species: Smilax rotundifolia L.
Bayer Code: SMIRO

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.
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greenbriar roots, tuber
greenbriar, back of leaf
Growth Season perennial weed 
Growth Habit upright OR vining 
Leaflet Number one 
Leaf Margin smooth 
Leaf Hairs nonehas no hairs, but very prominent thorns and prickles
Leaf/Leaflet Shape heart/kidney/spade OR oval/egg-shaped/elliptical 
Leaf Width 1 - 2 inches OR greater than 2 inches 
Leaf Venation parallel 
Leaf Arrangement alternate 
Root Type fibrousvery "woody"; may also be found with white rhizomes
Flower Color yellowyellowish brown