ambrosia psilostachya

Noun
  1. Coarse perennial ragweed with creeping roots of dry barren lands of southwestern United States and Mexico (synset 111940602)
    is a type of: ambrosia, bitterweed, ragweed - any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
    same as: perennial ragweed, western ragweed

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