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