Page authors: Don Knoke, David Giblin
Arnica discoidea
rayless arnica, rayless leopardbane

Distribution: Occurring in the Cascades Mountains of Klickitat and Skamania counties in Washington; Washington to California, east to Nevada.

Habitat: Forest openings from middle elevations to the subalpine.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Apomixis, bumblebees, butterflies


Perennial from long rhizomes, the stems mostly solitary, 2-5 dm. tall, glandular-puberulent and more or less long-hairy.


Long-petiolate, deltoid or sub-cordate basal leaves commonly on separate short shoots; cauline leaves 2-4 pairs, reduced upward, petiolate, ovate, 4-8 cm. long and 1.5-5 cm. wide, irregularly toothed, with long, soft hairs on both sides, pale beneath.


Heads usually several, rayless; involucre 11-13 mm. high, with hairs and stalked glands throughout.

Identification Notes:

The similar rayless Arnica parryi has narrower leaves and the heads are nodding in bud.

Accepted Name:
Arnica discoidea Benth.
Publication: Pl. Hartw. 319. 1849.

Synonyms & Misapplications:
Arnica discoidea Benth. var. eradiata (A. Gray) Cronquist [HC]
Arnica grayi A. Heller
Arnica parviflora A. Gray ssp. alata (Rydb.) Maguire
Arnica parviflora A. Gray ssp. parviflora
Additional Resources:

PNW Herbaria: Specimen records of Arnica discoidea in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Arnica discoidea checklist entry.

OregonFlora: Arnica discoidea information.

E-Flora BC: Arnica discoidea atlas page.

CalPhotos: Arnica discoidea photos.

USDA Plants: Arnica discoidea information.

17 photographs:
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