Synonyms for Helianthemum Canadense (same or very similar meaning)
WordNet sense 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):
frostweed, frost-weed, frostwort, Crocanthemum canadenseiFrom the ODE community, based on WordNetadd/edit