Arnica parryi |
Arnica spathulata |
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Parry's arnica |
Klamath arnica, spatulate arnica |
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Habit | Plants 1.5–7 dm; rhizomatous. | Plants 1–5 dm; rhizomatous. |
Stems | simple to much branched, villous, stipitate-glandular distally. |
simple to much branched, lightly or densely spiculate or pilose to tomentose, stipitate-glandular distally or throughout. |
Basal leaves | withered by flowering, often in separate sterile rosettes, petiolate or subsessile. |
some petioles distinctly winged. |
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. |
2–5 pairs, sometimes crowded proximally, distally reduced; blades ovate or lanceolate to linear, 1.5–13 cm, bases rounded or attenuate; margins denticulate to dentate or serrate; tips acute or obtuse; surfaces sparsely to densely villous, petiolate proximally, usually winged, sessile distally. |
Peduncles | stipitate-glandular. |
stipitate-glandular. |
Involucres | campanulate, 10–15 mm. |
broadly to narrowly campanulate, 15–25 mm. |
Ray florets | 0 or obscure. |
0. |
Disc florets | 20–60; corollas 8–10 mm, yellow. |
15–50; corollas 8–11 mm, yellow. |
Phyllaries | narrowly oblanceolate to elliptic or linear; tips acute or acuminate; surfaces stipitate-glandular, sometimes also hispid. |
lanceolate to oblanceolate or elliptic; tips acute; surfaces stipitate-glandular, sometimes pilose. |
Fruits | columnar-fusiform, 4–6 mm, dark brown or blackish, glabrous or hispid; pappus bristles 7–10 mm; straw-colored, barbellate. |
columnar or columnar-fusiform, 4–8 mm; black; gland-dotted, sometimes also hispid, rarely glabrous; pappus bristles 7–10 mm, white, barbellate. |
Heads | discoid or rarely obscurely radiate, nodding in bud. |
discoid. |
2n | =38, 57, 76. |
=38, 76. |
Arnica parryi |
Arnica spathulata |
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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. |
Coniferous forests, mixed woodlands, open slopes, clearcuts, on serpentine soils. Flowering May–Aug. 400–1200 m. Casc, CR, Sisk. CA. Native. |
Source | Flora of Oregon, volume 2, page 186 Kenton Chambers |
Flora of Oregon, volume 2, page 186 Kenton Chambers |
Sibling taxa | ||
Synonyms | Arnica parryi var. parryi, Arnica parryi var. sonnei | Arnica spathulata ssp. eastwoodiae, Arnica spathulata ssp. spathulata |
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