ambrosia psilostachya

English Thesaurus

1. coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico (noun.plant)

hypernym	:	ambrosia, bitterweed, ragweed,
definition	:	any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma (noun.plant)