Arnica latifolia |
Arnica fulgens |
|
---|---|---|
broad-leaf arnica, daffodil leopardbane, mountain arnica |
foothill arnica, hillside arnica, orange arnica, shining leopardbane |
|
Habit | Plants 10–50 cm. | Plants 10–75 cm. |
Stems | usually simple, sometimes branched distally. |
solitary, simple. |
Leaves | 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. |
3–5 pairs, crowded toward stem bases (some or all axils with dense tufts of brown wool); petiolate (petioles at least basal leaves, narrow or broadly winged); blades (with 3 or 5 prominent, subparallel veins) usually narrowly oblanceolate to oblong, rarely oval or broadly spatulate, 4.5–20 × 0.5–2.5 cm, margins denticulate, apices obtuse, faces moderately uniformly hairy, stipitate-glandular. |
Involucres | narrowly turbinate. |
broadly hemispheric. |
Ray florets | 8–15; corollas yellow. |
8–16; corollas yellow-orange. |
Disc florets | 20–90; corollas yellow; anthers yellow. |
corollas yellow; anthers yellow. |
Phyllaries | 8–20, lanceolate to oblanceolate. |
13–21, elliptic-oblong or narrowly to broadly lanceolate. |
Heads | 1 or 3–5(–9). |
1(–3). |
Cypselae | dark brown, 5–9 mm, sparsely villous; pappi white, bristles barbellate. |
brown, 3.5–7 mm, densely hirsute, sometimes sparingly stipitate-glandular; pappi usually white, sometimes tawny, bristles barbellate. |
2n | = 38, 76. |
= 38, 57. |
Arnica latifolia |
Arnica fulgens |
|
Phenology | Flowering Jul–Aug. | Flowering May–Jul. |
Habitat | Relatively moist, montane conifer forests to subalpine meadows | Prairies and grasslands to montane conifer forests |
Elevation | 500–3300 m (1600–10800 ft) | 500–3000 m (1600–9800 ft) |
Distribution |
AK; CA; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT
|
CA; CO; ID; MT; ND; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
|
Source | FNA vol. 21, p. 376. | FNA vol. 21, p. 370. |
Parent taxa | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica | Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica |
Sibling taxa | ||
Synonyms | A. monocephala, A. pedunculata | |
Name authority | Bongard: Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 147. (1832) | Pursh: Fl. Amer. Sept. 2: 527. (1813) |
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