Native to (or naturalized in) Oregon:
- Herbaceous perennial, to 2.5 to 4 inches (6-10 cm) tall, from a horizontal creeping rhizome. Leaves have 3 leaflets, 6 × 3.5 cm, green, glabrous above, margins and underside with long hairs, long petiole (3-20 cm). Flowers solitary, 2-2.5 cm across, white to light pink. Fruit 7-8 mm, globose.
- Partial to full shade, dappled sunlight, humus-rich soil. Somewhat aggresive, but excellent for an untamed woodland setting.
- Hardy to USDA Zone 7 Native along the coast from the Olympic Peninsula to California, up the Columbia River Gorge and onto the western slope of the Cascades in Oregon.
- Oxalis: the Greek name for sorrel, from oxys, acid (sour), a reference to the acrid juice of most species. oregona: of Oregon.