Arnica ovata |
Arnica latifolia |
|
---|---|---|
diverse arnica, leaf arnica, sticky arnica, sticky-leaf arnica |
broad-leaf arnica, daffodil leopardbane, mountain arnica |
|
Habit | Plants 10–50 cm. | Plants 10–50 cm. |
Stems | (forming clumps) simple or branched among heads. |
usually simple, sometimes branched distally. |
Leaves | 2–3(–4) pairs (basal 1–2 pairs usually withered by flowering, petiolate, petioles broadly winged, blades round-ovate, relatively small; sterile rosettes lacking), mostly cauline; petiolate (at least middle pair, petioles broadly to narrowly winged); blades broadly deltate to ovate, 4–8 × 2–6 cm (middle pair largest), margins irregularly denticulate to coarsely dentate-serrate, apices acute, faces puberulent (hairs minute) and stipitate-glandular. |
2–4(–6) pairs, cauline (basal leaves often persistent on sterile rosettes), petiolate (proximal, petioles relatively short, broadly winged) or sessile (mid and distal); blades lance-elliptic to ovate, 2–10 × 1–6 cm, margins serrate to dentate, apices obtuse to acute, faces glabrous or sparsely villous. |
Involucres | usually narrowly turbinate, rarely narrowly campanulate. |
narrowly turbinate. |
Ray florets | 8–16, yellow. |
8–15; corollas yellow. |
Disc florets | corollas yellow; anthers yellow. |
20–90; corollas yellow; anthers yellow. |
Phyllaries | 9–20, linear to narrowly lanceolate. |
8–20, lanceolate to oblanceolate. |
Heads | 1–3(–5). |
1 or 3–5(–9). |
Cypselae | brown to black, 5–7 mm, sparsely to moderately pilose and stipitate-glandular; pappi stramineous to tawny, bristles subplumose. |
dark brown, 5–9 mm, sparsely villous; pappi white, bristles barbellate. |
2n | = 57, 76. |
= 38, 76. |
Arnica ovata |
Arnica latifolia |
|
Phenology | Flowering Jul–Sep. | Flowering Jul–Aug. |
Habitat | Moist meadows and conifer forests, stream banks, late snow-melt areas, montane to subalpine | Relatively moist, montane conifer forests to subalpine meadows |
Elevation | 200–3600 m (700–11800 ft) | 500–3300 m (1600–10800 ft) |
Distribution |
AK; CA; CO; ID; MT; OR; UT; WA; WY; AB; BC; YT
|
AK; CA; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT
|
Source | FNA vol. 21, p. 372. | FNA vol. 21, p. 376. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica |
Sibling taxa | ||
Synonyms | A. diversifolia, A. latifolia var. viscidula | |
Name authority | Greene: Pittonia 4: 161. (1900) | Bongard: Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 147. (1832) |
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