Page authors: Don Knoke, David Giblin
Collomia tinctoria
yellow-staining collomia, yellow-staining mountain-trumpet

Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to central Idaho and southeast Oregon.

Habitat: Dry, open places in the foothills to moderate or mid-elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Flies, moths


Strongly glandular, slender annual, the simple to freely-branched stem up to 1.5 dm. tall.


Leaves linear, 1-5 cm. long and 1-5 mm. wide, the lower often opposite.


Flowers short-pedicellate, borne in 2- to 5-flowered clusters in the forks of the stem, the inflorescence often congested; calyx teeth 5, narrowly triangular, 2-3 mm. long, the tip firm; corolla lavender to pinkish, over twice as long as the calyx, with slender tube and 5 short lobes; filaments equally inserted but of unequal length, from 0.5 to 2.5 mm. long; style 3-parted; ovary superior.


Capsule with 3, 1-seeded carpels.

Accepted Name:
Collomia tinctoria Kellogg
Publication: Proc. Calif. Acad. Sci. 3(2): 17-18, f. 2. 1863.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Collomia tinctoria checklist entry.

OregonFlora: Collomia tinctoria information.

E-Flora BC: Collomia tinctoria atlas page.

CalPhotos: Collomia tinctoria photos.

USDA Plants: Collomia tinctoria information.

25 photographs:
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