Page authors: Don Knoke, David Giblin
Collomia heterophylla
varied-leaf collomia, variable-leaf mountain-trumpet

Distribution: Occurring mostly west of the Cascades in Washington; British Columbia to California, east to Idaho.

Habitat: Woods, forest openings and stream banks, low to moderate elevations in the mountains.

Flowers: June-August

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Annual with sticky, soft hairs at least above, usually with several stems from the base, 0.5-4 dm. tall.


Leaves alternate, the lower pinnatifid, the blade up to 3.5 cm. long and 2 cm. wide; leaves progressively smaller and less divided upward, becoming entire and elliptic below the inflorescence.


Inflorescence of dense, leafy-bracteate clusters terminating the stem and branches; corolla usually pink, occasionally white or lavender, 8-17 mm. long, much longer than the calyx, the tube slender, the 5 lobes short and spreading; calyx tube of uniform, papery texture, with 5 lobes; filaments short, unequally inserted in the corolla tube well below the sinuses; style 3-parted; ovary superior.


Capsule with 3 carpels, each 2- or 3-seeded.

Accepted Name:
Collomia heterophylla Douglas ex Hook.
Publication: Bot. Mag. 65: pl. 3695. 1838.

Synonyms & Misapplications:
(none provided)
Additional Resources:

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

WA Flora Checklist: Collomia heterophylla checklist entry.

OregonFlora: Collomia heterophylla information.

E-Flora BC: Collomia heterophylla atlas page.

CalPhotos: Collomia heterophylla photos.

USDA Plants: Collomia heterophylla information.

32 photographs:
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