Meaning : 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 : crocanthemum canadense, frost-weed, frostwort, helianthemum canadense
Meaning : Tall perennial herb having clusters of white flowers. The eastern United States.
Synonyms : frost-weed, verbesina virginica, virginia crownbeard