Rag·weed n. Bot. A common American composite weed (Ambrosia artemisiaefolia) with finely divided leaves; hogweed.
Great ragweed, a coarse American herb (Ambrosia trifida), with rough three-lobed opposite leaves.
◄ ►
Ambrosia trifida
n : a coarse annual with some leaves deeply and palmately
3-cleft or 5-cleft [syn: great ragweed]