WordNet
frost-weed
n. 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 [syn: frostweed, frostwort, Helianthemum canadense, Crocanthemum canadensei]
tall perennial herb having clusters of white flowers; the eastern United States [syn: Virginia crownbeard, frostweed, Verbesina virginica]