Arnica dealbata |
Arnica parryi |
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Parry's arnica |
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Habit | Plants 1.5–7 dm; rhizomatous. | |
Stems | simple to much branched, villous, stipitate-glandular distally. |
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Basal leaves | withered by flowering, often in separate sterile rosettes, petiolate or subsessile. |
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Cauline leaves | 2–4 pairs; lowermost crowded near stem bases; upper pairs much reduced; blades ovate to lanceolate or linear-elliptic, 2–10 cm, bases rounded or attenuate; margins entire or denticulate; veins branching laterally; tips acute; surfaces villous-tomentose, sparsely stipitate-glandular or gland-dotted adaxially; lowermost long-petiolate; upper sessile. |
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Peduncles | stipitate-glandular. |
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Involucres | campanulate, 10–15 mm. |
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Ray florets | 0 or obscure. |
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Disc florets | 20–60; corollas 8–10 mm, yellow. |
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Phyllaries | narrowly oblanceolate to elliptic or linear; tips acute or acuminate; surfaces stipitate-glandular, sometimes also hispid. |
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Fruits | columnar-fusiform, 4–6 mm, dark brown or blackish, glabrous or hispid; pappus bristles 7–10 mm; straw-colored, barbellate. |
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Heads | discoid or rarely obscurely radiate, nodding in bud. |
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2n | =38, 57, 76. |
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Arnica dealbata |
Arnica parryi |
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Distribution | ||
Discussion | Coniferous forests, meadows, ridges. Flowering Jun–Sep. 1200–2700 m. BR, BW, Casc, ECas, Sisk. CA, ID, NV, WA; north to Yukon, northeast to Alberta, east to WY, southeast to CO. Native. |
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Source | Flora of Oregon, volume 2, page 186 Kenton Chambers |
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Sibling taxa | ||
Synonyms | Arnica parryi var. parryi, Arnica parryi var. sonnei | |
Web links |
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