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Delphinium glaucum S. Watson
Sierra Larkspur, Tower Larkspur
Ranunculaceae (Buttercup Family)
Synonym(s): Delphinium brownii, Delphinium scopulorum, Delphinium scopulorum var. glaucum
USDA Symbol: DEGL3
USDA Native Status: L48 (N), AK (N), CAN (N)
Rising from a woody rootstock, the stout, leafy stems of this perennial reach 3-6 feet, or more, in height. Leaves are palmately divided and toothed becoming gradually smaller up the stem. Both the leaves and the stems have a grayish, waxy covering. Densely flowered racemes are up to 16 in. long and are made up of spurred, blue-purple flowers.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Fruit Type: Follicle
Size Notes: Up to about 9 feet tall, often shorter.
Bloom InformationBloom Color: Blue , Purple
Bloom Time: Jun , Jul , Aug , Sep
DistributionUSA: AK , AZ , CA , CO , ID , MT , NV , OR , UT , WA , WY
Native Distribution: Mts. from AK to Madera Co., CA, e. to the Rockies
Native Habitat: Wet, subalpine to alpine meadows & stream banks
Growing ConditionsWater Use: High
Light Requirement: Part Shade
Soil Moisture: Moist , Wet
CaCO3 Tolerance: Medium
Soil Description: Wet or moist soils.
BenefitUse Wildlife: Birds, Hummingbirds, Butterflies
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
Attracts: Birds , Hummingbirds
PropagationDescription: Sow fresh seeds in fall for outdoor stratification.
Commercially Avail: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Native Seed Network - Corvallis, OR
Web ReferenceWebref 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 resourcesUSDA: Find Delphinium glaucum in USDA Plants
FNA: Find Delphinium glaucum in the Flora of North America (if available)
Google: Search Google for Delphinium glaucum
MetadataRecord Modified: 2023-02-06
Research By: TWC Staff