Spreading, decumbent annual herb, to 25 cm high and 35 cm wide. Leaves with 1 pair of leaflets; petiole flattened, 5.5–21 mm long; leaflets succulent, not appressed to each other, narrowly obovate to obovate, often asymmetrically so, 9–15 mm long, 3.5–11 mm wide, articulated at base, 3-lobed at apex. Pedicel 3–7 mm long in flower, deflexed. Sepals 4, 5.5 mm long. Petals 4, obovate, 8–10.5 mm long, longer than sepals, yellow drying white. Stamens 8; filaments 5 mm long, winged in lower part; wing apex and upper part fringed. Disc sinuate, 8-lobed, succulent, not markedly pubescent on margin. Ovary 4-celled, glabrous, 4-angled, with angles narrowly winged; stigma minutely 4-lobed. Capsule pendent, 4-angled, 4-celled, elliptic, 10–20 mm long, rounded at base and apex; pedicel 6–10 mm long; fruiting style 1–1.5 mm long. Seeds 2–4 per cell, c. 3 mm long, pale brown, smooth, sometimes shining.
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