Taproots gradually ramified distally. Stems erect, 0.5-3 cm. Leaves: basal leaves withering at or soon after anthesis, sessile, blade linear to slightly clavate, terete, 0.8-2 cm, margins entire, apex obtuse; cauline leaves absent. Inflorescences with flowers borne singly; bracts 2-4, proximal in 1 pair, ovate to lanceolate, 2-3 mm, margins entire, apex acute. Flowers sessile to subsessile, disarticulate in fruit; sepals 2, broadly obovate to broadly ovate, 7-8 mm, scarious at anthesis, margins entire, apex rounded or sometimes emarginate; petals 5-8, pale rose-pink, oblanceolate to broadly obovate, 13-18 mm, apex obtuse; stamens 1-15; stigmas 4. Seeds 11-15, 2.8-3.5 mm.

Flowering late winter-mid(-late) spring. Granitic formations on rocky, gravelly, or sandy substrate; of conservation concern; 1900-2600 m; Calif.

Lewisia disepala is known only from scattered localities in the southern Sierra Nevada.