Page author: David Giblin
Delphinium glareosum
Olympic larkspur

Distribution: In the Olympic and Cascades mountains of Washington; British Columbia south to Oregon.

Habitat: Alpine and subalpine ridges and talus slopes, sometimes found at lower elevations.

Flowers: May-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Sturdy perennial from a thick, fibrous, woody root, the 1-several stems stout, simple, 2-3 dm. tall.


Leaves numerous, fleshy, evenly distributed below the inflorescence, but the petioles of the lower and basal leaves proportionately longer, forming a rounded clump; leaf blades 3-8 cm. broad, divided nearly to the base into 3 primary lobes, the lateral lobes again divided into 2-3 parts, the ultimate segments linear to narrowly oblong, entire.


Inflorescence loose and broad, the racemes compound, often half the height of the plant, the lower flowers or racemes in leaf axils; pedicels long, stout, spreading; sepals 5, deep purplish-blue, the lower pair 12-16 mm. long, the lateral pair oblanceolate, pointed, the spur 12-17 mm. long, exceeding the blade of the upper sepal; petals 4, small, blue; stamens numerous; pistils 3.


Follicles spreading, 11-14 mm. long..

Accepted Name:
Delphinium glareosum Greene
Publication: Pittonia. 3: 257. 1898. 1898.

Synonyms & Misapplications:
Delphinium caprorum Ewan
Additional Resources:

PNW Herbaria: Specimen records of Delphinium glareosum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Delphinium glareosum checklist entry.

E-Flora BC: Delphinium glareosum atlas page.

CalPhotos: Delphinium glareosum photos.

USDA Plants: Delphinium glareosum information.

32 photographs:
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