Perennial herb. Stems erect to decumbent, up to 70 mm long, often with adventitious roots. Leaves fleshy; blade linear to narrowly linear-obovate, 3-5 x 1 mm, apex obtuse, flat above, convex below, glabrous, pale green. Flowers: solitary, terminal in axil of a leaf; 4-merous; anthers red; calyx lobes obtuse; corolla cup-shaped, lobes elliptic-oblong, ± 1.5 mm long, apex bluntly acute, recurved, white; Nov.-Feb.
Perennial, succulent herb, branches up to 0.07 m long, erect, decumbent, in moist soil around standing water, adventitious roots. Leaves linear, 3-5 x 1 mm, glabrous, pale green, fleshy. Inflorescence with terminal flowers in axil of leaf-like bracts. Corolla cup-shaped, scarcely fused at base, white, 1.2-2.0 mm long, obtuse, recurved from middle; lobes elliptic-oblong, 1.5 mm long. Flowering time Nov.-Feb.