Oxalis debilis
Oxalis californica
pink wood-sorrel, world-wide wood-sorrel
California wood-sorrel, Californica wood sorrel
usually 2–8 from base, erect to ascending, 10–40 cm, becoming woody proximally, glabrous or very sparsely short-puberulent, hairs curved-ascending, nonseptate.
basal;
petiole 10–25 cm;
leaflets 3, green to yellowish green, rounded-obcordate, 17–40(–50) mm, lobed 1/6–1/5 length, lobes apically convex, adaxial surface hirsute, adaxial surface glabrous, oxalate deposits in dots at least around distal margins, often evenly over surface.
basal and cauline;
stipules oblong, margins narrowly flanged, apical auricles absent;
petiole 3–8 cm, hairs nonseptate;
leaflets 3, gray-green, obcordate, 8–15 mm, lobed 1/5–1/3 length, surfaces sparsely strigose, oxalate deposits absent.
irregular cymes, (3–)8–14(–28)-flowered;
scapes 15–28 cm, moderately villous to glabrate.
umbelliform cymes, 1(–3)-flowered;
peduncles 2–9 cm.
mostly homostylous, infrequently tristylous;
sepal apices with 2 orange tubercles;
petals violet to lavender or rose purple, 10–16(–20) mm.
distylous;
sepal apices without tubercles, surfaces glabrous;
petals yellow, with red lines proximally, 7–11(–13) mm.
not observed.
angular-cylindric, abruptly tapering to apex, 10–15 mm, strigillose, hairs very short, nonseptate.
= 14, 28, rarely 35.
Oxalis debilis
Oxalis californica
Oxalis debilis appears to be spreading rapidly in the United States. The species produces numerous bulblets in a basal cluster and apparently also can spread laterally by production of bulblets at the tips of filiform roots or rhizomes; it can form large, dense colonies. A. Lourteig (1980) noted that plants of this species occasionally fruit but consistently reproduce through abundant bulblets. They apparently are seed-sterile in North America.
Oxalis corymbosa and O. debilis were differentiated by A. Lourteig (2000) primarily by the distribution of oxalate deposits in the leaf lamina. In O. debilis, the dotlike deposits are crowded along the margins and absent to distinctly less abundant elsewhere. In O. corymbosa, the deposits are evenly distributed over the whole lamina. In their native range in South America, the two expressions are broadly sympatric and intermediates are common, as they are in the flora area. Intermediates have the oxalate dots along the margins as well as over the whole surface or sometimes mostly on the outer third of the blades, near the margins. There is no justification for formal recognition of two entities.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Oxalis californica is recognized by its caulescent habit, stems with reduced vestiture (glabrous or very sparsely short-puberulent), one (to three) flowers on long peduncles and pedicels, the yellow corollas often drying with a blue or purplish tinge, and relatively wide, glabrous, and usually purplish or pinkish tinged sepals.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
CalFlora
Flora NW
LA Plants
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
