Open English Wordnet
Nouns
(n)oxtongue, bristly oxtongue, bitterweed, bugloss, Picris echioideswidespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States
(n)ragweed, ambrosia, bitterweedany of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma