Clarkia rhomboidea Douglas ex Hook.
common clarkia (diamond clarkia)
Onagraceae (Evening Primrose family)

Introduction to Vascular Plants


© Curtis Bjork     (Photo ID #22001)


E-Flora BC Static Map

Distribution of Clarkia rhomboidea
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Species Information

Annual herb from a slender taproot; stems 15-100 cm tall, usually simple, short stiff-hairy.
Few, mostly somewhat opposite, elliptic to lanceolate, 2-7 cm long, 5-20 mm wide, entire to finely toothed; stalks slender, 1-3 cm long.
Inflorescence a few-flowered, short raceme, buds nodding; hypanthium 1-3 mm long, scaly and white-hairy at the base of the stamens; corollas wheel-shaped, slightly irregular; petals rose-purple and often purple-dotted, 5-10 mm long, 3-6 mm wide, claw 2-lobed, the blade lance- to widely egg-shaped or diamond-shaped; sepals usually free; fertile stamens 8, all alike; stigmas oval, about 0.5 mm long, white to purple; styles not exceeding stamens.
Capsules, 1.5-3.3 cm long, short-beaked.

SourceThe Illustrated Flora of British Columbia


If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Dry, open areas in the lower montane zone; rare in SE BC east of the Coast-Cascade Mountains, known only from Trail and Pend d'Oreille River; S to ID, UT, AZ and CA.

SourceThe Illustrated Flora of British Columbia