Broadleaf Arnica

Arnica menziesii Hook. Fl. Bor. Am. 1: 331. 1834
Rootstock horizontal; stem 4-6 dm. high, striate, more or less villous and glandular, especially in the inflorescence; leave* of the offsets long-petioled, the petioles 5-15 cm. long; blades cordate or ovate, coarsely dentate, 4-8 cm. long, puberulent on both sides; stem-Ii 3 or 4 pairs, the lower short petioled, with usually rounded -cordate blades, the upper]
sessile ..irply dentate, 3 6 cm. long; head, i 5, cymose; involucre broadly turbinate
itiulatc, al»out 12 mm. high and 15-1 Ij villous and glandular put
brad 12 IS, oblanceolate, acuminate, raj flowei 10 i -', the ligules 13—20 mm, long,
about 4 mm. wide, 2-4-toothed; d. 7 mm long; a. In lie , (. mm long, (Daringly
ly towards the apex; pappi 6 nun long, white, barbellate
Tm locality Roekj Mountains.
v • now Hook i'i Boi Am pi. III.

Arnica latifolia Bong. Mem. Acad. St. Petersb VI. 2: 147. 1833.
Arnica Menziezii Hook. Fl. Bor. Am. 1: 331, in part. 1834. Arnica intermedia Howell, Ms.
Rootstock horizontal; stem 3-6 dm. high, sparingly villous and puberulent, densely shortvillous, almost velutinous in the inflorescence; leaves of the offsets long-petioled, the petioles 5-10 cm. long; blades thin, oval or ovate or those of the earlier ones cordate, crenate-dentate, with mucronulate teeth, 2-8 cm. long, puberulent above, paler and glabrous or sparingly pubescent on the veins beneath; stem-leaves 3-5 pairs, the lower short-petioled, the upper sessile; blades crenate-dentate, ovate, 3-S cm. long; heads 1-5, cymose; involucre broadly turbinate, 12-15 mm. high, 12-15 mm. broad, finely and rather densely villous; bracts 12-15, oblanceolate or rarely linear-oblanceolate, acuminate; ray-flowers 8-12, the ligules 15-20 mm. long, 3-4 mm. wide; disk-corollas 7 mm. long; achenes striate, 6 mm. long, from glabrous to glandular-granuliferous, often with a few hairs near the apex; pappus-bristles white, 6 mm. long, barbellate.
Type locality: Sitka. Alaska. Distribution : Alaska to Oregon.