bitterweed

Noun
Synonyms: oxtonguebristly oxtonguebuglossPicris echioidesragweedambrosia

WordNet 3.0

Noun (2)

  1. widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United StatesSynonyms: oxtonguebristly oxtonguebuglossPicris echioides
  2. any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthmaSynonyms: ragweedambrosia
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Webster's Dictionary (GCIDE)

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