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Perennial herb from a taproot; stems erect, branched, thinly hairy, 40-80 cm tall.
Basal leaves oblanceolate to lanceolate, simple to irregularly pinnately cut or with a wavy margin, sparsely long-hairy above, long-hairy below, soon deciduous; stem leaves similar, reduced upwards.
Heads discoid, few to many, solitary at the ends of branches; disk flowers reddish-purple, the sterile marginal ones, if present, about 30 mm long, enlarged at the tips with 5 narrow lobes, the central ones perfect and about 20 mm long; involucres 12-18 mm tall, 10-14 mm wide; involucral bracts with enlarged, tattered or sometimes comb-like, light to dark brownish, often papery appendages at the tips, these wider than the bracts.
Achenes 2-3 mm long; pappus lacking or of papery bristles, 4-5 mm long.
Source: The Illustrated Flora of British Columbia