Compilation
Arnica hirsuta

Herb with thick perennial rootstock and fleshy roots; crown of rootstock densely woolly. Leaves prostrate or semi-prostrate, obovate, broadly elliptic or ovate, 5.5–30´1–8 cm, apex obtuse to rounded, sometimes acuminate, ± densely cottony-pilose beneath, scattered-pilose to almost glabrous above, with brownish-hairy margins. Scapes 1–3 from each rosette, 7–95 cm long, ± tomentose in lower part, the uppermost ± 2 cm immediately below the capitulum inflated and very densely tomentose with usually golden-brown hairs; involucre 16–28 mm long; phyllaries green or purplish, lanceolate, acute, densely brownish-pilose. Outer florets female, corolla 12.5–15.5 mm long, with the outer lip ray-like, 5–10 mm long, white usually tinged pink to maroon on the outside, at least at the apex; outermost inner florets female, innermost bisexual, corollas white, 7.5–11 mm long, lips subequal. Achenes minutely pubescent, ± 3-angled with 5–7 prominent ribs, attenuate into a long beak, 8–11(–19) mm long; pappus of tawny bristles 7.5–9 mm long.