Arnica cordifolia |
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heart-leaf arnica, heart-leaf leopardbane |
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Habit | Plants 10–40(–70) cm. |
Stems | usually simple, sometimes branched. |
Leaves | 2–4(–6) pairs, mostly cauline (basal often persistent on sterile rosettes); petiolate; blades cordate or subcordate to ovate, 3–10 × 2–10 cm, margins dentate to coarsely dentate, apices acute to rounded, faces puberulent to sparsely villous, sometimes stipitate-glandular (especially adaxial). |
Involucres | broadly campanulate. |
Ray florets | 6–13; corollas yellow. |
Disc florets | corollas yellow; anthers yellow. |
Phyllaries | 10–20, narrowly ovate to lanceolate. |
Heads | 1, or 3–5(–10). |
Cypselae | dark gray, 5–10 mm, sparsely to densely hirsute (hairs duplex), sometimes stipitate-glandular as well; pappi white, bristles barbellate. |
2n | = 38, 57, 76, 95, 114. |
Arnica cordifolia |
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Phenology | Flowering May–Jul. |
Habitat | Conifer forests to subalpine meadows |
Elevation | 500–3000 m [1600–9800 ft] |
Distribution |
AZ; CA; CO; ID; MI; MT; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; NT; ON; SK; YT
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Source | FNA vol. 21, p. 374. |
Parent taxa | |
Sibling taxa | |
Synonyms | A. cordifolia var. pumila, A. paniculata, A. whitneyi |
Name authority | Hooker: Fl. Bor.-Amer. 1: 331. (1834) |
Web links |
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