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Parry's arnica

Klamath arnica, spatulate arnica

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

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
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
A. cernua, A. chamissonis, A. cordifolia, A. discoidea, A. diversifolia, A. fulgens, A. gracilis, A. lanceolata, A. latifolia, A. longifolia, A. mollis, A. nevadensis, A. rydbergii, A. sororia, A. spathulata, A. viscosa
A. cernua, A. chamissonis, A. cordifolia, A. discoidea, A. diversifolia, A. fulgens, A. gracilis, A. lanceolata, A. latifolia, A. longifolia, A. mollis, A. nevadensis, A. parryi, A. rydbergii, A. sororia, A. viscosa
Synonyms Arnica parryi var. parryi, Arnica parryi var. sonnei Arnica spathulata ssp. eastwoodiae, Arnica spathulata ssp. spathulata
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