Arnica fulgens Pursh

Arnica fulgens Pursh, Fl. Am. Sept. 527. 1814
A mica monlana fulgens Nutt. Gen. 2: 164. 1818. Arnica augustifolia Nutt. Trans. Am. Phil. Soc. II. 7: 407. 1841. Arnica pedunculala Rydb. Bull. Torrey Club 24: 297. 1897. Arnica monocephala Rydb. Mem. N. Y. Bot. Gard. 1: 435. 1900. Arnica pedunculala tubularis Cockerell, Jour. Hered. 7: 228. 1916.
Rootstock usually short and thick, and with dense tufts of brown villous hairs on the crown; stem 2-5 dm. high, striate or sulcate, viscidly short-villous and glandular-puberulent throughout ; offsets rarely present at flowering time, their leaves similar to the basal and lower cauline leaves; basal leaves several, oblanceolate or spatulate, obtuse or rounded at the apex, tapering at the base, with a short winged petiole, 5—1,5 cm. long, strongly 3-5-ribbed, shortvillous and glandular-puberulent on both sides; stem-leaves 2 or 3 pairs, the lowest pair oblanceolate, 6-10 cm. long, tapering below into a winged petiole, the rest linear and the uppermost reduced; heads 1—3, usually solitary; peduncles 5-20 cm. long; involucre hemispheric, 12-14 mm. high, often 2 cm. broad, densely hirsute-villous and somewhat glandular; bracts 15-20, narrowly lanceolate or linear, acute; ray .flowers 10-15, the ligules orange, 14-18 mm. long, 3-6 mm. broad, coarsely 3-toothed at the apex; disk-corollas 8 mm. long; achenes about 8 mm. long, hirsute; pappus-bristles white, barbellate, 8-9 mm. long.
Type locality: Banks of the Missouri.
Distribution: Manitoba to Nebraska, Colorado, Oregon, and British Columbia.