Decumbent, spreading, annual herb, 7–20 cm high, to 30 cm wide. Leaves with 1 pair of leaflets; petiole narrowly and equally winged either side, 3.5–17 mm long; leaflets succulent, obovate, often asymmetrically so, 8–17 mm long, 3–10.5 mm wide, usually continuous with petiole and not articulated at base, irregularly (2–) 3 (4–)-lobed at apex. Flowers solitary at each node. Pedicel 8–20 mm long in flower, erect. Sepals 5, 3–4 mm long. Petals 5, obovate to spathulate, 5.5–7 mm long, yellow drying white. Stamens 10; filaments 3 mm long, winged below; wing apex oblique, subentire or slightly toothed. Disc 5-lobed; lobes joined, sinuate, succulent, papillose on margin. Ovary 5-angled, 5-celled, glabrous; stigma lobed. Capsule initially pendent, ?becoming erect, 5-angled, 5-celled, transversely broadly oblong with rounded corners, 8–13 mm long, rounded at apex; pedicel 8–19 mm long; fruiting style 0.7–0.8 mm long. Seeds 2 or 3 (–4) per cell, very shiny, smooth.