Oxalis articulata subsp. rubra

Windowbox wood-sorrel, Windowbox Wood-Sorrel

Family: Oxalidaceae · Type: perennial · Not Native

Windowbox wood-sorrel is a naturalized perennial found in coastal and southern California regions including the San Francisco Bay Area, Santa Cruz, northern Channel Islands, and Peninsular Ranges in disturbed places at elevations below 800 meters. Flowering from April to October, this plant produces white to purple-rose flowers with delicate petals and sepals featuring distinctive orange tubercles at their tips. Growing with a woody rhizome and bulb-like tubercles, it forms low-growing clusters without prominent above-ground stems. Its leaves are basal with delicate leaflets less than 2 centimeters long, arranged in a characteristic three-part pattern typical of wood-sorrel species. Small umbel-like flower clusters with up to 10 blooms emerge on peduncles longer than the leaf stems.

Habitat: Disturbed places

Bloom period: Apr-Oct

Elevation: < 800 m

Bioregions: NCo, ScV, CCo, SnFrB, SCo, n ChI, PR

California counties: San Mateo, Marin, Los Angeles, Napa, Humboldt, Mendocino, Santa Barbara, Ventura, Alameda, Stanislaus, Santa Clara, Monterey, Sacramento

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