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Noun: ironweed  'I(-u)rn,weed
  1. Any of various plants of the genus Vernonia of tropical and warm regions of especially North America that take their name from their loose heads of purple to rose flowers that quickly take on a rusty hue
    - vernonia

Derived forms: ironweeds

Type of: herb, herbaceous plant

Part of: genus Vernonia

Encyclopedia: Ironweed