Subshrubs, erect. Young branchlets trigonous-prismatic, densely pubescent. Leaves digitately 3-foliolate; stipules linear-lanceolate, 0.6-1 cm, hairy, deciduous; petiole 1.5-2.5 cm, densely pubescent; petiolules extremely short, densely pubescent; terminal leaflet oblong or ovate-lanceolate, 4-7 × 1.5-3 cm, thickly papery, sparsely pubescent, basal veins 3, base rounded, apex obtuse, sometimes with small mucro; lateral leaflets slightly smaller, oblique. Raceme axillary, usually 2-2.5 cm, densely pale villous; bracts narrowly ovate-lanceolate; peduncle short. Flowers clustered. Calyx lobes lanceolate, much longer than tube. Corolla purple, subequal to calyx; standard oblong, shortly clawed, inconspicuously auriculate; wings falcate, clawed, both auriculate; keel elliptic, slightly curved, clawed, with acute auricle on one side. Ovary hairy. Legume elliptic, 6-8 × 5-6 mm, pubescent, compressed. Seeds 2, black, suborbicular. Fl. Mar-Jun, fr. May-Oct.
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A shrub that lies along the ground. It is 1-2 m high. The rootstock is straight and stout and 1 m long. The branches are slender. They are covered with brown hairs. The leaves have 3 leaflets. The leaflets are oval and 4-9 cm long by 2-4 cm wide. The flowers are rose-pink. The pods are round and 8-10 mm long by 5-6 mm across. There are 2 seeds.
Open fields, grasslands; at elevations up to 100-300 metres. An undershrub in forests, often in rather dry forests. Drier hills, especially of pine forest, in Myanmar.
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It is a tropical plant. It is native to southern China.
Can be grown by seedlings. Seeds needs soaking.
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