Spreading, decumbent, annual herb, 12–15 cm high, to 25 cm wide. Leaves with 1 pair of leaflets; petiole 10–21 mm long, narrowly winged either side, with wing dilated towards apex; leaflets spreading widely, succulent, elliptic, usually narrowly so, sometimes asymmetric, 10.5–15 mm long, 2.8–4.5 mm wide, lobed at base, continuous with petiole, rounded-obtuse at apex. Flowers solitary at each node. Pedicel 7–16.5 mm long in flower, erect. Sepals 5, 2.2–2.5 mm long. Petals 5, spathulate, c. 3.5 mm long, longer than sepals, yellow drying white. Stamens 10; filaments c. 2 mm long, winged at base; wing toothed. Disc sinuately lobed; lobes joined. Ovary 5-angled, 5-celled, glabrous; style 0.5 mm long; stigma distinctly 5-lobed. Capsule erect, 5-angled, 5-celled, elliptic, 8.3–11.5 mm long, rounded at apex; pedicel 12–18 mm long; fruiting style 0.5 mm long. Seeds 2–5 per cell, 3–3.5 mm long, pale brown, not shining.
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