27. Clarkia biloba (Durand) A. Nelson & J. F. Macbride, Bot. Gaz. 65: 60. 1918.
[E F]
Two lobed clarkia
Oenothera biloba Durand, Pl. Pratten. Calif., 87. 1855; Godetia biloba (Durand) S. Watson
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.
Subspecies 3 (3 in the flora): California.
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.
