Klamath Arnica

Plants 15–45+ cm. Stems simple or branched. Leaves 3–5 pairs, sometimes crowded toward bases (basal leaves often persistent on sterile rosettes); petiolate (petioles mostly broadly winged, 1–9 × 0.2–1.5 cm); blades elliptic-ovate to spatulate, 2–8 × 1–4 cm, margins subentire to mostly irregularly dentate, apices acute, faces sparsely to densely villous, stipitate-glandular. Heads 1, or 3–9(–25). Involucres turbinate-campanulate. Phyllaries 8–15, broadly to narrowly lanceolate. Ray florets 0. Disc florets 15–50; corollas yellow; anthers yellow. Cypselae black, 5–10 mm, sparsely stipitate-glandular; pappi white, bristles barbellate. 2n = 38, 76.

Arnica eastwoodiae Rydberg; A. spathulata subsp. eastwoodiae (Rydberg) Maguire; A. spathulata var. eastwoodiae (Rydberg) Ediger & T. M. Barkley

Arnica eastwoodiae Rydberg, sp. now
Rootstock short, branched; basal leaves rather many, as well as those of the offsets oblanceolate or spatulate, 4-8 cm. long, tapering into a short winged petiole, dentate, acute or obtuse, villous-hirstue ; stem-leaves 2 or 3 pairs, linear, coarsely toothed, sessile, 2-4 cm. long, 3-5 mm. wide, the uppermost often alternate; heads 3-6; involucre turbinate, 10-12 mm. high, about as broad, glandular-puberulent and villous; bracts about 12, lance-linear, acuminate; ray-flowers wanting; disk-corollas 6 mm. long; achenes hirsute and glandular-granuliferous, 5 mm. long; pappus-bristles white, 7 mm. long, barbellate.
Tvpe collected at Gasquet. French Hill, Del Norte County, California. September 14, 1912, Alice Eastwood 2211 (herb. X. Y. Bot. Card.).

Arnica spathulata Greene, Pittonia 3 : 103. 1896
Rootstock short; stem 3-5 dm. high, sulcate, long-villous; basal leaves with winged petioles; blades broadly lanceolate or oblanceolate, narrowed below into the broad petiole, 5-8 cm. long, coarsely dentate, villous on both sides; stem-leaves about 3 pairs, the lowest pair similar to the basal ones, but the petioles more broadly winged, almost as broad at the base as the blade, the uppermost leaves sessile, ovate, clasping, those of the inflorescence lanceolate, entire; heads cymose, 3-10; involucre rounded-campanulate, 12-15 mm. high, villous; bracts 12-15, lanceolate, long-acute or acuminate; ray-flowers wanting; disk-corollas 9 mm. long; achenes 6-7 mm. long, sulcate, sparingly glandular-granuliferous or glabrous; pappus-bristles nearly 1 cm. long, white, barbellate.
Type locality: Oregon. Distribution: Oregon.