Erect or decumbent, annual herb, 5–30 cm high, usually wider than high. Leaves with 1 pair of leaflets; petiole flattened, but appearing subterete in older leaves, 5–17 mm long; leaflets succulent, appressed to each other, obliquely elliptic or obovate, 7–30 mm long, 4–20 mm wide, apparently articulated at base but in young leaves continuous with petiole and not articulated, rounded at apex. Pedicel 3–3.5 (–7) mm long in flower. Sepals 4, 1.7–2 mm long, with continuous hyaline margin. Petals 4, obovate, 2.5–4 mm long, longer than sepals, yellow drying white. Stamens 8; filaments 1.5–2.5 mm long, winged in basal half; wing apex irregularly toothed. Disc 4-lobed; lobes free, oblong. Ovary 4-angled, 4-celled, glabrous; stigma minutely capitate, not lobed. Capsule pendent, 4-angled, 4-celled, broadly obovate, 6.3–9 mm long, 4.3–7 mm wide, rounded at apex into short apiculum; pedicel 5–5.5 (–12) mm long; fruiting style 0.3–0.6 mm long. Seeds 2 per cell, 3.1–3.2 mm long, pale brown, dull.
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