General: Perennial herb from a freely rooted rhizome; stems solitary, sometimes branched above, sparsely to densely hairy with multicellular hairs, sometimes also glandular, 15-65 cm tall.
Leaves: Basal leaves elliptic, smaller than the stem leaves, often produced on separate shoots, often deciduous by flowering time; stem leaves 2-4 pairs, opposite, lanceolate to oblanceolate or elliptic, 2-20 cm long, 0.5-2.5 cm wide, reduced above, glabrous to glandular and hairy, stalked below, unstalked above, entire to coarsely toothed.
Flowers: Heads with ray and disk flowers, 1-5, usually erect, the bases hairy and glandular; involucres 10-18 mm tall; involucral bracts lanceolate to oblanceolate, hairy, and with stalked glands; ray flowers yellow, 14-20, short-toothed at the tips; disk flowers yellow.
Fruits: Achenes 5.0-7.5 mm long, usually moderately hairy and sometimes glandular; pappus brownish, more or less feathery.
Arnica amplexicaulis subsp. genuina Maguire Arnica amplexicaulis subsp. prima (Maguire) Maguire Arnica amplexicaulis var. piperi H. St. John & Warren Arnica amplexicaulis var. prima (Maguire) B. Boivin Arnica amplexifolia Rydb. Arnica mollis var. aspera (Greene) B. Boivin Arnica mollis var. silvatica (Greene) Maguire
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:
2021-12-04 3:18:29 AM
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