Unresolved name

Arnica betonicaefolia Greene

Comprehensive Description

provided by North American Flora
Arnica betonicaefolia Greene, Pittonia 4: 163. 1900
Arnica aphanaclis Piper, Proc. Biol. Soc. Wash. 33: 105. 1920.
Rootstock slender, horizontal; stem 1-3 dm. high, sparingly puberulent or glabrate below, more densely puberulent above; petioles of the basal leaves about 2 cm. long; blades ovate, crenate-dentate, about 2 cm. long, glabrous or sparingly short-hairy on the veins beneath, sparingly short-hairy or glabrate above; stem-leaves 2-4 pairs, the lower short-petioled, oval, crenate-dentate, obtuse, 2-3 cm. long, the upper sessile, more ovate, acute, and more sharply dentate; heads 1-3, mostly solitary; involucre turbinate, 1 cm. high, 12-15 mm. broad, sparingly villous; bracts about 12, broadly-obovate, acuminate; ray-flowers 8-12, the ligules 10-12 mm. long, about 3 mm. broad, 3-dentate, 7-9-veined; tube of disk-flowers 2 mm. long; throat 4 mm. long; achenes 5 mm. long, almost glabrous; pappus-bristles white, about 6 mm. long, barbellate.
Type locality: Olympic mountains. Washington. Distribution: Southern Alaska to Alberta and Oregon.
bibliographic citation
Per Axel Rydberg. 1927. (CARDUALES); CARDUACEAE; LIABEAE, NEUROLAENEAE, SENECIONEAE (pars). North American flora. vol 34(4). New York Botanical Garden, New York, NY
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