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Annual or short-lived perennial, pubescent to villous or glabrescent herb. Leaves 3–7 cm long; leaflets 4–8 pairs, oblong, to c. 15 x 5 mm; stipules ovate-lanceolate, 3–6 mm long. Pedicel 10–50 mm long. Sepals lanceolate, c. 5–10 mm long. Petals yellow, c. 8–20 mm long. Stamens 8–10; filaments 3–5 mm long. Style 1–4 mm long; stigma ± hemispherical to cylindrical. Fruit disc-shaped; pedicel 15–50 mm long; mericarps c. 8 x 4 mm, with 2 lateral spines 5–10 mm long and 2 basal spines c. 2 mm long.