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Noun: frostweed
  1. Perennial of the eastern United States having early solitary yellow flowers followed by late petalless flowers; so-called because ice crystals form on it during first frosts
    - frost-weed, frostwort, Helianthemum canadense, Crocanthemum canadense
     
  2. Tall perennial herb having clusters of white flowers; the eastern United States
    - Virginia crownbeard, frost-weed, Verbesina virginica

Derived forms: frost-weeds, frostweeds

Type of: crown beard, crownbeard, crown-beard, helianthemum, sun rose, sunrose