Page author: David Giblin
Clarkia rhomboidea
common clarkia, diamond fairyfan

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

Habitat: Dry, often sandy soil in forest openings at low to moderate elevtions.

Flowers: May-July

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bumblebees, bees, flies, beetles, moths, wasps


Annual, the stem 1.5-10 dm. tall, usually simple, covered with fine, appressed hairs.


Leaves few, alternate, with slender petioles 1-3 cm. long; leaf blades lanceolate to elliptic, 2-7 cm. long and 5-20 mm. broad, entire to denticulate.


Inflorescence a few-flowered, loose raceme; buds nodding; calyx tube 1-3 mm. long, scaly and white-hairy at the base of the stamens; calyx lobes 4, distinct; corolla slightly irregular, rose-purple and often purple-dotted, the petals 5-10 mm. long and 3-6 mm. broad, with a narrow, rhomboidal blade 2-4 times the length of the broad, often basally toothed claw; fertile stamens 8; style 4-parted, stigmas 4, oval, 0.5 mm. long, white to purple; ovary inferior, 4-celled.


Capsule 4-celled, 1.5-3 cm. long, short-beaked.

Accepted Name:
Clarkia rhomboidea Douglas ex Hook.
Publication: Fl. Bor.-Amer. 1: 214. 1833.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Clarkia rhomboidea in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Clarkia rhomboidea checklist entry.

OregonFlora: Clarkia rhomboidea information.

E-Flora BC: Clarkia rhomboidea atlas page.

CalPhotos: Clarkia rhomboidea photos.

USDA Plants: Clarkia rhomboidea information.

19 photographs:
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