Clarkia prostrata
Clarkia biloba
prostrate clarkia
two lobed clarkia, twolobe clarkia
prostrate or decumbent, to 50 cm, sparsely puberulent.
erect, 30–100 cm, strigillose.
sessile or subsessile;
blade oblanceolate to elliptic, 1–2.5 cm, apex usually obtuse.
petiole to 15 mm;
blade linear to lanceolate, 2–8 cm.
prostrate, dense racemes, axis straight;
buds erect.
open racemes, axis recurved at tip in bud;
buds pendent.
floral tube 4–7 mm;
sepals usually reflexed in pairs;
corolla bowl-shaped, petals lavender-pink shading pale yellow basally, with reddish purple spot above base, 10–15 mm;
stamens 8, subequal;
ovary 8-grooved;
stigma not exserted beyond anthers.
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.
20–30 mm.
10–25 mm.
brown or gray, 1–1.5 mm, scaly, crest 0.2 mm.
brown, 1 mm, minutely scaly to puberulent, crest inconspicuous.
= 52.
Clarkia prostrata
Clarkia biloba
Clarkia prostrata, like C. davyi, occurs only on coastal bluffs and adjacent low elevation pine forests along the Pacific coast, and in this case only in the California Central Coast Subregion in Monterey, Santa Barbara, Santa Cruz, and San Luis Obispo counties.
Clarkia prostrata is a hexaploid that combines the tetraploid genome of C. davyi and the diploid genome of C. speciosa. Clarkia prostrata is morphologically and ecologically very similar to C. davyi but can usually be distinguished by its larger flowers with a spot on each petal. It differs from C. speciosa by having smaller flowers with the stigma not exserted beyond the anthers.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Petals bright pink to magenta, narrowly fan-shaped, length greater than 1.5 times width. | 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. | subsp. biloba |
2. Petals lavender, shallowly 2-lobed, lobes usually less than 1/5 petal length, sometimes obscure. | subsp. brandegeeae |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
