1. [ noun ] (botany) 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
Synonyms: Helianthemum_canadense Crocanthemum_canadensei frost-weed frostwort
Related terms: helianthemum
2. [ noun ] (botany) tall perennial herb having clusters of white flowers; the eastern United States
Synonyms: Verbesina_virginica frost-weed Virginia_crownbeard
Related terms: crownbeard
Similar spelling:   frost-weed