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Leaf-blades narrowly lanceolate, 5–8 mm wide. Flowers: corolla rotate, petals purplish to pale-pink, broadly fan-shaped, length not greater than 1.5 times width, deeply 2-lobed, lobes usually 1/5–1/2 petal length. 2n = 16.


Phenology: Flowering May–Aug.
Habitat: Foothill woodlands.
Elevation: 0–1000 m.

Discussion

Subspecies biloba is known from the central and northern Sierra Nevada Foothills, especially in Calaveras, El Dorado, and Tuolumne counties, and from the eastern San Francisco Bay area in Contra Costa County.

Selected References

None.

Lower Taxa

None.
Harlan Lewis† +  and Peter C. Hoch +
(Durand) A. Nelson & J. F. Macbride +
Oenothera biloba +
indehiscent +  and loculicidal +
denticulate +  and entire +
linear +  and lanceolate +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
subsessile +  and long-pedicellate +
curved +  and straight +
indehiscent +  and loculicidal +
subclavate +, subfusiform +  and cylindrical +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
elongated +
inconspicuous +
0–1000 m. +
basifixed +  and versatile +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
campanulate +  and obconic +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
actinomorphic +
pedicellate +  and sessile +
curved +  and straight +
indehiscent +  and loculicidal +
terete +, 4-angled +, clavate +, fusiform +, cylindrical +  and elongate +
Foothill woodlands. +
unicellular-papillose +
deciduous +
purple +  and darker-pink +
numerous +  and 1 +
purplish +  and pale-pink +
2-lobed +  and fan--shaped +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0 cm0 mm <br />0 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering May–Aug. +
red +, lavender +, blue-gray +, yellow +  and cream +
basal +  and cauline +
several +  and 1 +
clavate +  and globose +
minutely scaly +  and puberulent +
few +  and numerous +
sculptured +  and smooth +
1 cm10 mm <br />0.01 m <br /> (?) +
pink +  and purplish red +
deciduous +
0 +  and 1 +
parenchymatous +
parietal +, axile +  and placentation +
1 +, 4 +  and 2 +
unequal +
aquatic +, amphibious +  and terrestrial +
unequal +
2 times as many or as many as sepals +
unbranched +  and sparsely branched +
decumbent +  and prostrate +
slender +  and stout +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
petiolate +  and sessile +
intrapetiolar +
aquatic +, amphibious +  and terrestrial +
Godetia biloba +
Clarkia biloba subsp. biloba +
Clarkia biloba +
subspecies +
3(-5)-aperturate +
short-acute +
smooth +  and erose +
papillate +