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