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Delphinium glareosum (Olympic larkspur)
Bransford, W.D. and Dolphia

Delphinium glareosum

Delphinium glareosum Greene

Olympic Larkspur, Delphinium

Ranunculaceae (Buttercup Family)

Synonym(s): Delphinium caprorum, Delphinium glareosum ssp. caprorum, Delphinium glareosum var. caprorum

USDA Symbol: degl

USDA Native Status: L48 (N), CAN (N)

A sturdy perennial with one to several stout, thick, 8-16 in. stems. Numerous fleshy, round, much-divided leaves are distributed evenly along the stems with the basal and lower leaves forming a rounded clump. The loosely-flowered spike is well over half the total height of the plant and made up of deep bluish-purple, spurred flowers.


From the Image Gallery

2 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Follicle
Size Notes: Up to about 16 inches tall.

Bloom Information

Bloom Color: Blue , Purple
Bloom Time: Jun , Jul , Aug


Canada: BC
Native Distribution: C. Cascades of OR & from Chelan Co. to Yakima Co., WA; also in the Olympic Mts.
Native Habitat: Alpine & subalpine talus slopes & rocky ridges

Growing Conditions

Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry
Soil Description: Rocky soils.


Warning: Plants of the genus Delphinium contain toxins, and no parts of them should ever be eaten. They can be fatally poisonous to both humans and animals. Sensitivity to a toxin varies with a personís age, weight, physical condition, and individual susceptibility. Children are most vulnerable because of their curiosity and small size. Toxicity can vary in a plant according to season, the plantís different parts, and its stage of growth; and plants can absorb toxic substances, such as herbicides, pesticides, and pollutants from the water, air, and soil.
Conspicuous Flowers: yes


Description: Sow fresh seeds in fall for outdoor stratification.
Commercially Avail: yes

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Delphinium glareosum in USDA Plants
FNA: Find Delphinium glareosum in the Flora of North America (if available)
Google: Search Google for Delphinium glareosum


Record Modified: 2023-02-06
Research By: TWC Staff

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