Petasites
butterbur, coltsfoot
2 species
4 subspecies and varieties
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Petasites frigidusalpine butterbur, sweet coltsfoot
Distribution: Occurring in forested and mountainous areas throughout Washington; Alaska to California, east across the northern half of North America to the Atlantic Coast; circumboreal.
Habitat: Meadows, swamps, and other wet places, from low elevations to the alpine.
Origin: Native
Flowers: March-August
Growth Duration: perennial
var. frigidus – alpine butterbur, arctic butterbur, sweet coltsfoot
var. palmatus – western coltsfoot
var. sagittatus – arrowhead sweet coltsfoot, arrowleaf coltsfoot
var. ×vitifolius – hybrid coltsfoot, Wenatchee coltsfoot
Petasites japonicusJapanese sweet coltsfoot
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to Oregon.
Habitat: Forest edge, typically where moist and disturbed; generally escaping from cultivation.
Origin: Introduced from Asia
Flowers: June-September
Growth Duration: perennial