frostweed

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. 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:
frost-weed, frostwort, Helianthemum canadense, Crocanthemum canadense
• Hypernyms:
helianthemum, sunrose, sun rose
2. tall perennial herb having clusters of white flowers;
the eastern United States
• Syn:
Virginia crownbeard, frost-weed, Verbesina virginica
• Hypernyms:
crownbeard, crown-beard, crown beard