frostwort
n 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: {frostweed}, {frost-weed}, {frostwort},
{Helianthemum canadense}, {Crocanthemum canadense}]
Frostwort \Frost`wort"\, n. (Bot.)
Same as {Frostweed}.
[1913 Webster]