General: Perennial herb from a long rhizome; stems erect, solitary, occasionally branched below the middle, sparsely to densely long-hairy, becoming glandular above, 20-100 cm tall.
Leaves: Basal leaves often deciduous by flowering time; stem leaves 5-10 pairs, rarely only 4 pairs, opposite, 3-30 cm long, 0.3-8 cm wide, lanceolate to oblanceolate, 3-5 veined, sparsely to densely long-hairy to silvery-hairy, stalked below, not stalked above, entire to toothed, reduced upward.
Flowers: Heads with ray and disk flowers, 5-15, rarely as few as 1, usually erect, the bases sparsely to densely long-hairy with white hairs, often glandular; involucres 8-15 mm tall; involucral bracts lanceolate, rounded to abruptly pointed, sparsely to densely long-hairy with a conspicuous tuft of whitish hairs at the apex; ray flowers yellow, usually 10-16, apical teeth conspicuous; disk flowers yellow.
Fruits: Achenes 3.8-6 mm long, cylindric, short-hairy and glandular to subglabrate; pappus tawny or whitish, finely-barbed or somewhat feathery.
Notes: Three fairly well-marked taxa may be recognized in BC.
1. Pappus somewhat feathery, tawny; involucres densely long-hairy with some unstalked glands, the basal hairs with prominent crosswalls; leaves usually toothed and unstalked or the lowermost stalked..................... ssp. chamissonis
1. Pappus finely-barbed, whitish to straw-colored; involucres densely long-hairy but without unstalked glands, the basal hairs with less prominent crosswalls; leaves usually toothed and long-stalked, at least below.
Wet to mesic meadows and forest openings in the montane and subalpine zones; ssp. chamissonis and ssp. foliosa common in BC, ssp. incana rare; N to AK and YT, E to ON and S to NM, AZ and CA. Description
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2021-05-11 10:21:31 AM
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