General: Perennial herb from a rhizome; stems erect, several, 0.3-1.5 m tall.
Leaves: Basal leaves soon deciduous; stem leaves linear-lanceolate to oblanceolate, egg-shaped or almost round in outline, few-toothed or lobed to deeply pinnate or subpalmately divided, some of the segments again toothed or divided, white-woolly below, green or rarely finely white-woolly above, 5-15 cm long.
Flowers: Heads disciform, erect or nodding in a compact or narrow, branched inflorescence; involucres bell-shaped or top-shaped, 3-5 mm tall; involucral bracts broadly lanceolate to egg-shaped, purplish or sometimes green; receptacles glabrous; female flowers 8-12; disk flowers 20-40.
Fruits: Achenes glabrous.
Notes: Only two varieties of this species are readily separated taxonomically, and to a lesser extent geographically, in our region (Douglas 1995). They may be separated as follows:
1. Inflorescence relatively short and compact, usually overtopped by the upper leaves .....................var. tilesii
1. Inflorescence ample and open to subcompact in a narrow, branched inflorescence, always surpassing the upper leaves....................... var. unalaschcensis (Bess.) Hult.
Moist to mesic meadows, streambanks, gravel bars, rocky slopes and open forests in the lowland and montane to alpine zones; common in N BC, infrequent southward; circumboreal, N to AK, YT and NT; E to ON and S to MT, ID and OR, Eurasia.
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:
2021-09-18 6:06:16 AM
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