Oxalis oregana

Oregon wood sorrel

Family: Oxalidaceae · Type: perennial · Native

Oregon wood sorrel is a California native perennial found in northern coastal, western Klamath Ranges, northern coastal redwood, central coastal, and San Francisco Bay Area regions in moist conifer forest at elevations below 1,000 meters. Flowering from February to October, this plant produces white flowers with a subtle yellow spot near the base, delicate and approximately 1 to 2 centimeters long. Growing with a creeping, fleshy rhizome and almost no visible stem, it spreads low to the ground with clustered leaves at the rhizome tips. Its leaves are compound with three leaflets up to 4 centimeters long, often showing a distinctive purple coloration on the underside and featuring pale midribs. The plant forms small, dense clusters with individual flowers emerging on slender hairy stalks up to 26 centimeters tall.

Habitat: Moist conifer forest

Bloom period: Feb-Oct

Elevation: < 1000 m

Bioregions: NCo, w KR, NCoRO, CCo, SnFrB

California counties: San Mateo, Humboldt, Mendocino, Marin, Sonoma, Monterey, Santa Cruz, Del Norte, Santa Barbara, Santa Clara, Trinity, Butte, Alameda, Contra Costa, San Luis Obispo, Napa

Data from The California Species Project — 14,000+ California species with verified data from CNPS, CDFW, USFWS, Jepson eFlora, Cal-IPC, and more.