Arnica chionophila

Arnica chionophila Greene, Pittonia 4: 171. 1900
Rootstock short, branched; stem 1-2 dm. high, sparingly villous and glandular-puberulent, densely so on the peduncles; leaves of the offsets and the basal leaves long-petioled, the petioles 1-3 cm. long; blades rounded-cordate, 1-3 cm. long, often fully as broad, rounded or obtuse at the apex, entire-margined or denticulate, sparingly villous and rather densely glandularpuberulent; stem-leaves 1 or 2 pairs (rarely 3 pairs), the lower pair similar to the basal leaves, but the petioles often somewhat wing-margined and the blades larger, the second pair ovate or oval, short-petioled or subsessile, the third pair, if present, much reduced and sessile; heads usually solitary, rarely 3; involucre turbinate, 15 mm. high, 15-18 mm. broad, glandularpuberulent and sparingly villous; bracts 12-15, linear-lanceolate, acute or acuminate; rayflowers about 10, the ligules 12-15 mm. long, 4-5 mm. wide, almost entire at the apex; diskcorollas about S mm. long; achenes 7 mm. long, sparingly hirsute and glandular-granuliferous; pappus-bristles about 8 mm. long, white, barbellate.
Type locality: Ruby Mountains, Nevada.
Distribution: Mountains of northern Nevada, northern California, and southern Oregon.