Page authors: Don Knoke, David Giblin
Oxalis corniculata
creeping yellow wood-sorrel

Distribution: Occurring chiefly west of the Cascades crest and along the Columbia River in Washington; British Columbia to California, east across most of North America to the Atlantic Coast;

Habitat: A weed of gardens, disturbed areas, and waste places.

Flowers: May-October

Origin: Introduced from Europe

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Apomixis, bumblebees, flies


Herbaceous perennial without rhizomes, but the stems trailing and freely rooting, glabrous or with appressed, aligned hairs; erect portions of the stems up to 1 dm. tall, the herbage usually brownish-red.


Leaves alternate, trifoliate, long-petiolate, the leaflets obcordate, 1-4 cm. long, drooping; stipules brownish, from fairly broad and 2-4 mm. long to linear and under 1.5 mm. long.


Flowers 2-5 on long, axillary peduncles; sepals 5, persistent; petals 5, yellow, 4-8 mm. long, entire; stamens 10, of 2 unequal lengths, the filaments glabrous; pistil 5-celled; styles 5, slender, distinct.


Capsule oblong, 1.5-2.5 cm. long, grayish-hairy.

Accepted Name:
Oxalis corniculata L.
Publication: Sp. Pl. 1: 435. 1753.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Oxalis corniculata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Oxalis corniculata checklist entry.

OregonFlora: Oxalis corniculata information.

E-Flora BC: Oxalis corniculata atlas page.

CalPhotos: Oxalis corniculata photos.

USDA Plants: Oxalis corniculata information.

10 photographs:
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