Definitions for: Bitterweed


[n] any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
[n] widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States



Webster (1913) Definition: Bit"ter*weed`, n. (Bot.)
A species of Ambrosia (A. artemisi[ae]folia); Roman worm
wood. --Gray.

Synonyms: ambrosia, bristly oxtongue, bugloss, oxtongue, Picris echioides, ragweed

See Also: Ambrosia artemisiifolia, Ambrosia psilostachya, Ambrosia trifida, common ragweed, genus Ambrosia, genus Picris, great ragweed, perennial ragweed, Picris, weed, western ragweed

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