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Bruso, George H.
Helianthemum canadense (L.) Michx.
Longbranch frostweed, Frostweed, Rock frost, Frostplant, Frostwort
USDA Symbol: HECA3
USDA Native Status: Native to U.S.
1 (rarely 2) showy, yellow-petaled flower atop main stem; later in season clusters of inconspicuous, bud-like flowers without petals in leaf axils.
This perennial of dry open sites flowers only in the sunlight, a fact that explains the genus name, which is derived from the Greek helios (the sun) and anthemon (flower). The common name refers to the ice crystals that form from sap exuding from cracks near the base of the stem in late fall. The flower lasts only one day and produces many seeds.
Bloom InformationBloom Time: May , Jun , Jul
AL , CT , DC , DE , GA , IA , IL , IN , KY , MA , MD , ME , MI , MN , MO , NC , NH , NJ , NY , OH , PA , RI , SC , TN , VA , VT , WI , WV Canada: NS
, ON Native Distribution:
Ontario east to Nova Scotia, south to Georgia, west to Alabama, Kentucky, and Missouri, and north to Minnesota. Native Habitat:
Dry, sandy, or rocky, open woods and woodland openings. USDA Native Status: L48(N), CAN(N)
BenefitConspicuous Flowers: yes
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Record Modified: 2010-02-02
Research By: TWC Staff