Page authors: Don Knoke, David Giblin
Collomia larsenii
Larsen's alpine collomia, talus collomia

Distribution: Occurring in the Olympic and Cascade Mountains in Washington; Washington to California.

Habitat: Rocky, often moist slopes at high elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Loose-mat-forming perennial from a deep taproot, with numerous sprawling stems often several dm. long.


Leaves alternate, crowded, short-petiolate, the blade up to 3 cm. long and 13 mm. wide; principle leaves deeply and sometimes irregularly 3- to 7-cleft, with some or all of the segments again cleft.


Flowers usually sessile in small, leafy-bracteate clusters at the ends of the stems; corolla tubular-funnelform, 12-15 mm. long, blue or lavender to pink or white, the tube much longer than the 5 lobes; calyx 5-lobed, the tube of uniform papery texture; stamens 5, equally inserted in the corolla tube well below the sinuses; style 3-parted; ovary superior.


Capsule with 3, 1-seeded carpels.

Accepted Name:
Collomia larsenii (A. Gray) Payson
Publication: Univ. Wyoming Publ. Sci., Bot. 1: 85. 1924. 1924.

Synonyms & Misapplications:
Collomia debilis (S. Watson) Greene var. larsenii (A. Gray) Brand [HC]
Additional Resources:

PNW Herbaria: Specimen records of Collomia larsenii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Collomia larsenii checklist entry.

OregonFlora: Collomia larsenii information.

E-Flora BC: Collomia larsenii atlas page.

CalPhotos: Collomia larsenii photos.

USDA Plants: Collomia larsenii information.

24 photographs:
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