Arnica mollis

Fl. Bor.-Amer. 1: 331. 1834.
Common names: Hairy arnica
Treatment appears in FNA Volume 21. Treatment on page 372. Mentioned on page 367.
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Illustrator: Yevonn Wilson-Ramsey

Copyright: Flora of North America Association

Plants 15–70 cm. Stems (forming clumps) simple or branched among heads. Leaves (2–)3(–4) pairs, mostly cauline (basal sometimes present); petiolate (petioles relatively short, broad-winged) or subsessile; blades broadly elliptic, lance-elliptic, or narrowly to broadly lanceolate, 4–20 × 1–4 cm, margins entire or irregularly denticulate, apices acute, faces sparsely to moderately hairy (hairs relatively short to long, stipitate glands or soft, silky). Heads 1 or 3–7. Involucres hemispheric to campanulate. Phyllaries 10–22, usually broadly lanceolate, rarely narrowly lanceolate or oblanceolate. Ray florets 10–22; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae grayish brown to black, 4–8 mm, mostly stipitate-glandular, sparsely hirsutulous (hairs white to brownish, simple or bifid); pappi tawny, bristles plumose (with deep, amberlike deposits). 2n = 38, 57, 76, 95, 114, 133, 152.

Phenology: Flowering Jun–Sep.
Habitat: Moist meadows and conifer forests, stream banks, late snow-melt areas, montane to subalpine
Elevation: 1000–4000 m



Alta., B.C., N.W.T., Yukon, Alaska, Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.


Selected References


Lower Taxa


... more about "Arnica mollis"
Steven J. Wolf +
Hooker +
Hairy arnica +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1000–4000 m +
Moist meadows and conifer forests, stream banks, late snow-melt areas, montane to subalpine +
Flowering Jun–Sep. +
Fl. Bor.-Amer. +
Illustrated +  and Endemic +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Arnica mollis +
species +