Oxalis oregana , known as redwood sorrel or Oregon oxalis, is a species of the wood sorrel family, Oxalidaceae, in the genus Oxalis native to moist Douglas-fir and coast redwood forests of western North America from southwestern British Columbia to Washington, Oregon, and California.

[1][2] Oxalis oregana is a short, herbaceous perennial with erect flowering stems 5–15 cm tall.

The inflorescence is 2.4–4 cm in diameter, white to pink with five petals and sepals.

[5][6] The leaves of Oxalis oregana are eaten by the Cowlitz, Quileute and Quinault peoples.

Like spinach, they contain mildly toxic oxalic acid, which is named after the genus.