frostweed

Noun

• tall perennial herb having clusters of white flowers; the eastern United States

• 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

Related words

• Synonyms: 
  Virginia crownbeard , frost-weed , Verbesina virginica , frostwort , Helianthemum canadense , Crocanthemum canadense