rough bindweed(n = noun.plant) smilax aspera - creeping or climbing evergreen having spiny zigzag stems with shiny leaves and racemes of pale-green flowers; Canary Islands to southern Europe and Ethiopia and India;
is a kind of sarsaparilla

bindweed, black bindweed, diamond in the rough, field bindweed, hedge bindweed, rough, rough bristlegrass, rough cut, rough diamond, rough draft, rough drawing, rough fish, rough green snake, rough horsetail, rough in, rough out, rough pea, rough rider, rough sketch, rough sledding, rough up, rough water