Prostrate, silvery villous herb; stems 50–60 cm long. Leaves in unequal pairs, occasionally alternate, with 7–10 pairs of leaflets; petiole 2–10 mm long; leaflets subsessile, elliptic, 8.5–12 mm long, 3–5.5 mm wide, rounded-oblique at base, acuminate, sparsely villous adaxially, densely villous abaxially. Flowering pedicel 15–40 mm long, upright. Sepals 6–12 mm long, glabrous adaxially except for pubescent apex, densely villous abaxially except for glabrous hyaline margin. Petals broadly obovate, 10–17 mm long. Intrastaminal glands 5. Stamens 10, occasionally some staminodal, in 2 slightly unequal whorls; filaments 4–5 mm long. Ovary densely white-strigose; style 1–2.3 mm long; stigma similar length, rarely shorter than style. Fruit 10–20 mm high, 20–30 mm wide, of 2 or 3 (–5) tardily dissociating cocci; fruiting pedicel 15–50 mm long. Cocci asymmetrical, woody, pubescent and with many, sometimes toothed spines 4–6 (–8) mm long, all over dorsal surface.
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