Stems rooting at older nodes, prostrate, mat-forming, glabrous. Leaves crowded on short shoots; blade gray-green, white-margined, linear, 3-angled in cross section, 2–3 × 0.5–0.6 cm, apex acute. Inflorescences axillary or terminal cymes; pedicel to 20 mm. Flowers 3–7(–16), 15–22 mm diam.; calyx lobes keeled abaxially, 3–4 mm, apex obtuse, 3 lobes with papery margins; petals white, 8–10 mm; nectary glands distinct; stamens distinct, conic around stigmas; filament bases usually hairy; ovules 100; stigmas 5, caudate, papillate adaxially. Capsules 5-loculed. Seeds: mature seeds not observed. 2n = 18.
Phenology: Flowering late spring–fall.
Habitat: Margins of coastal wetlands, stabilized dunes
Elevation: 0-30 m
Introduced; Calif. (including San Nicholas Island), South Africa.
This species is known in the nursery trade in California as Delosperma ‘Alba.’