frostweed

English

Verbesina virginica

Helianthemum nummularium

Etymology

From frost +‎ weed. Late in autumn, crystals of ice shoot from the cracked bark at the root.

Noun

frostweed (countable and uncountable, plural frostweeds)

1. An American species of rockrose (Crocanthemum canadense, syn. Helianthemum canadense).
2. Verbesina virginica (white crownbeard)

Synonyms

• frostwort