General:
Perennial herb from a rhizome; stems solitary, sometimes branched above, 5-35 cm tall.

Leaves:
Basal leaves smaller than the stem leaves, often deciduous by flowering time; stem leaves 3-4 (rarely 5-6) pairs, often all produced near the basal ones, lanceolate to oblanceolate or elliptic, 1.5-14.5 cm long, 0.5-2.5 cm wide, reduced above, glabrous to hairy below, hairy above, unstalked or stalked below, unstalked above, entire to toothed.

Flowers:
Heads with ray and disk flowers, solitary, usually nodding, the bases moderately long-hairy with brown hairs; involucres 12-17 mm tall; involucral bracts lanceolate to elliptic, long-hairy, the tips fringed; ray flowers yellow, 8-14, conspicuously toothed; disk flowers yellow, anthers purple, conspicuous.

Fruits:
Achenes 5.0-6.5 mm long, sparsely short-hairy to glabrous; pappus brownish, finely-barbed to more or less feathery.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia

Synonyms and Alternate Names:
Arnica lessingii subsp. norbergii Hultén & Maguire