Nevada Arnica

Arnica nevadensis A. Gray, Proc. Am. Acad. 19: 55. 1883
Rootstock branched; stem 2-3 dm. high, striate, puberulent, somewhat glandular above; basal leaves and those of the offsets petioled, the petioles 3-5 cm. long, the blades firm, roundedovate or obovate, 3-5 cm. long, rounded at the apex, entire-margined, 3-5-ribbed, more or less densely puberulent; stem-leaves 2 or rarely 3 pairs, the lower similar to the basal ones, but petioles shorter, the upper ovate, sessile, 3-4 cm. long, those of the inflorescence linear-lanceolate ; heads 1-3, cymose; peduncles 5-10 cm. long; involucre turbinate, of the terminal head often 15 mm. high, and broad, of the lateral ones 12 mm., villous and glandular-puberulent ; bracts 8-10, lanceolate, acuminate; ray-flowers 8-12, the ligules 15-20 mm. long, 4—5 mm. wide, 5-7-veined; disk-corollas 6 mm. long; achenes 5 mm. long, striate, sparingly hirsutulous and glandulargranuliferous or glabrate; pappus-bristles straw-colored, 7 mm. long, short-plumose.
Type locality: Lassen's Peak, California. Distribution: Sierra Nevada of California and Nevada.

Arnica tomentella Greene, Pittonia 4: 166. 1900
Rootstock slender; stem 3-5 dm. high, puberulent, and glandular, especially on the peduncles; basal leaves several, long-petioled, the petioles 5-7 cm. long; blades ovate or oval, 5-ribbed, acute at the base, 5-7 cm. long, 2-3.5 cm. wide', finely and densely puberulent, almost tomentulose on both sides and glandular-granuliferous above, denticulate ; stem-leaves 3 or 4 pairs, the lowest pair similar to the basal ones, the next with short winged petioles, and the uppermost ovate or lanceolate, sessile, 2-4 cm. long; heads 1-3; involucre rounded-campanulate to hemispheric, 12-14 mm. high, 14-18 mm. broad, finely short-villous; bracts 9-12, oblanceolate, obtuse or acutish, 4-5 mm. long; ray-flowers 9-12, the ligules 13-15 mm. long, 3—4 mm. wide; disk-flowers 8 mm. long; achenes 6 mm. long, sparsely hirsute and glandulargranuliferous; pappus-bristles white, 8 mm. long, barbellate.
Tvpe locality: Middle Tule River, southeastern California. Distribution: Sierra Nevada. California.