frostweed

== English == === 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) An American species of rockrose (Crocanthemum canadense, syn. Helianthemum canadense). Verbesina virginica (white crownbeard) ==== Synonyms ==== frostwort