Page author: David Giblin
Delphinium lineapetalum
thin-petal larkspur
WTU specimens
Other herbaria

Distribution: Endemic to Washington, primarily found in the Wenatchee Mountains of Chelan and Kittitas Counties in Washington.

Habitat: Meadows and forest openings in foothills and valleys.

Flowers: April-June

Origin: Native

Conservation Status: Not of concern


Perennial from somewhat fleshy and tuberous roots, the stems 1.5-4 dm. tall, usually single and simple.


Leaves few, long-petiolate, mostly basal, the blades 2-6 cm. broad, 2-4 times parted or lobed into linear or oblong-lanceolate segments 1.5-5 mm. broad; cauline leaves much reduced upward.


Inflorescence simple or compound, the racemes 3-15 flowered; the lower pedicels several times as long as the flowers, spreading or ascending; sepals 5, pale blue, widely spreading, 17-25 mm. long, the lower pair the largest; the spur 13-20 mm. long, from about as long to twice as long as the top sepal; petals 4, pale blue to white, very prominently lined with purplish-black, the blade small, shorter than the claw; stamens numerous; pistils 3.


Follicles 15-22 mm. long, somewhat spreading.

Accepted Name:
Delphinium lineapetalum Ewan
Publication: Univ. Colorado Stud., Ser. D, Phys. Sci. 2: 126. 1945. 1945.

Synonyms & Misapplications:
Delphinium nuttallianum Pritz. var. lineapetalum (Ewan) C.L. Hitchc. [HC]
Additional Resources:

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

WA Flora Checklist: Delphinium lineapetalum checklist entry.

E-Flora BC: Delphinium lineapetalum atlas page.

CalPhotos: Delphinium lineapetalum photos.

USDA Plants: Delphinium lineapetalum information.

23 photographs:
Group by