Trees; wood red. Branches slender, slightly finely appressed puberulent, glabrescent, lenticellate. Leaves 10-15 cm; stipules caducous; leaflets (7-)11-13, ovate or elliptic, 2-4 × 1.2-2 cm, leathery, abaxially appressed pubescent, at length glabrescent, adaxially glabrous, apex rounded or emarginate, cuspidate. Panicles axillary and infra-axillary, 4-5 cm; branches 2-3 cm, pubescent. Pedicel ca. 2 mm, slender, puberulent; bracteoles linear, ca. 1 mm, acute. Calyx campanulate, 5-toothed; upper 2 teeth conical, subconnate, lateral 2 broadly triangular, acute, lowest tooth ca. 1.5 × as long as others. Corolla white; petals rather long clawed; standard broadly obovate or subreniform; wings elliptic; keel arcuate. Stamens (9 or)10, monadelphous. Ovary stipitate, glabrous, 3-ovuled. Legume stipitate, oblong to strap-shaped, 6-10 × 0.9-1.5 cm, thinly leathery, finely reticulate opposite 1 or 2 seeds, both ends obtuse. Seeds reniform, compressed, ca. 10 × 6 mm. Fl. Feb, fr. Apr-Sep.
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A small tree. It grows 20-30 m high. It loses its leaves during the year. The bark is smooth and cream. The leaves are 10-20 cm long. There are 3-6 pairs of leaflets. These are 3-5 cm long by 2 cm wide. They are round and often with slight notches. The young shoots have silky hairs. The flowers are 5-6 mm long and white or pink. They are in branched clusters. These are 5-8 cm long. The fruit are pods 3-10 cm long by 2 cm wide. There are 1-3 seeds.
Scattered in mixed, deciduous forest, hillsides in dry evergreen forest, usually found in open areas, at elevations from 100-1,500 metres. A common species in fire-prone areas where it is shrubby and coppicing.
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It is a tropical plant. It grows in open and fire prone areas. In southern China it grows in mixed forests on mountain slopes at about 1,700 m above sea level.
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