Page author: David Giblin
Leptosiphon harknessii
Harkness's desert-trumpets, three-seed desert-trumpets

Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Idaho and Utah.

Habitat: Drier open places, from the foothills to middle elevations in the mountains, often where moist to wet in spring.

Flowers: June-August

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Slender annual up to 2.5 dm. tall, freely branched above, usually glabrous.


Leaves palmately 3- to 7-parted into soft, linear segments up to 1.5 cm. long; or the uppermost entire.


Flowers on long pedicels, borne in the forks and terminating the branches; calyx 2-3 mm. long, equaling the capsule, with prominent translucent intervals between the 5 greener segments; corolla white or occasionally pale blue, glabrous, 1.5-2.5 mm. long, equaling the calyx, cleft halfway to the base, the limb 2.5 mm. wide; filaments equal length, glabrous; style 3-parted; ovary superior.


Capsule with 3, one-seeded carpels.

Accepted Name:
Leptosiphon harknessii (Curran) J.M. Porter & L.A. Johnson
Publication: Aliso 19(1): 80. 2000.

Synonyms & Misapplications:
Linanthus harknessii (Curran) Greene [HC]
Linanthus harknessii (Curran) Greene ssp. condensatus H. Mason
Additional Resources:

PNW Herbaria: Specimen records of Leptosiphon harknessii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Leptosiphon harknessii checklist entry.

E-Flora BC: Leptosiphon harknessii atlas page.

CalPhotos: Leptosiphon harknessii photos.

USDA Plants: Leptosiphon harknessii information.

26 photographs:
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