Bitterweed

مترادف و متضاد bitterweed

1. noun Any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
   Synonyms: ragweed, ambrosia
2. noun Widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States
   Synonyms: oxtongue, bristly oxtongue, bugloss, Picris echioides