Herbage glabrous. Leaflets: blade lanceolate to ovate. Flowers: sepals accrescent, lanceolate-ovate, 4-8 mm, glabrous; petals usually white, sometimes cream basally, aging or drying pink, obovate, 8-10 mm, 1 times as long as wide (apex recurved), glabrous or with scattered hairs on veins; filaments 3-4 mm; anthers cream to yellow, ± 1 mm; style 2-3 mm. Nutlets 3-4 mm, tuberculate (tubercles relatively low and wide).

Flowering Mar-May(-Jun). Wet meadows, ephemeral stream edges; of conservation concern; 600-2000 m; Calif.

Subspecies parishii has been found only in Riverside and San Diego counties.