Stems erect, 30–100 cm, strigil­lose. Leaves: petiole to 15 mm; blade linear to lanceolate, 2–8 cm. Inflorescences open racemes, axis recurved at tip in bud; buds pendent. Flowers: floral tube 1–4 mm; sepals reflexed together to 1 side; corolla rotate to bowl-shaped, petals purplish to pale pink, lavender, or bright pink to magenta, often red-flecked, broadly to narrowly fan-shaped, 10–25 mm, shallowly to deeply 2-lobed; stamens 8, unequal, outer anthers lavender, inner ones smaller, paler. Capsules 10–25 mm. Seeds brown, 1 mm, minutely scaly to puberulent, crest inconspicuous.

Distribution

California.

Discussion

Subspecies 3 (3 in the flora).

Clarkia biloba is most closely related to C. lingulata, which is derived from C. biloba subsp. australis. Some populations of C. biloba subsp. brandegeeae (originally described as a form of C. dudleyana) are morphologi­cally very similar to some individuals of C. dudleyana but the two taxa are separated geographically, have different chromosome numbers, and hybrids between them are sterile.

Selected References

None.

Lower Taxa

Clarkia biloba subsp. australis, Clarkia biloba subsp. biloba, Clarkia biloba subsp. brandegeeae

Key

1	Petals bright pink to magenta, narrowly fan-shaped, length greater than 1.5 times width.	Clarkia biloba subsp. australis
1	Petals lavender to pale or purplish pink, broadly fan-shaped, length not greater than 1.5 times width.	> 2
2	Petals purplish to pale pink, deeply 2-lobed, lobes usually 1/5–1/2 petal length.	Clarkia biloba subsp. biloba
2	Petals lavender, shallowly 2-lobed, lobes usually less than 1/5 petal length, sometimes obscure.	Clarkia biloba subsp. brandegeeae