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Perennial herb from a fibrous-rooted short crown; stems erect, usually solitary, much branched above, hollow, glaucous, glabrous, 0.4-2 m tall.
Basal leaves thick, somewhat succulent, 20-50 cm long including the stalk, 2-5 cm wide, narrowly oblanceolate to elliptic, entire, sometimes irregularly callous-toothed; stem leaves few, progressively reduced upwards, becoming unstalked.
Heads with ray and disk flowers, numerous in a clustered inflorescence; involucres 5-8 mm tall; involucral bracts lanceolate, with long-pointed, usually black tips, glabrous; bracteoles few, black-tipped; ray flowers few, yellow, 4-8 mm long or rarely lacking.
Achenes oblong, glabrous; pappus of white hairlike bristles.
Source: The Illustrated Flora of British Columbia