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Noun: frostwort
  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
    - frostweed, frost-weed, Helianthemum canadense, Crocanthemum canadense

Derived forms: frostworts

Type of: helianthemum, sun rose, sunrose