Description from Flora of China
Shrubs or trees, 3-8 m tall. Branchlets and inflorescences grayish yellow pubescent, glabrescent. Leaves 13-19-foliolate; rachis 8-20 cm, including petiole 3-4 cm; stipels acicular, 1-3 mm, caducous; petiolules ca. 2 mm, with trichomes; leaflet blades lanceolate, elliptic-lanceolate, narrowly elliptic, oblong, or ovate, 1.2-10 × 0.7-4 cm, papery to stiffly papery, abaxially pale green, adaxially dark green, base attenuate, cuneate, or subcordate and symmetric or slightly asymmetric, apex acute to attenuate. Pseudoracemes axillary, 6-15 cm; rachis nodes with 3 or 4 clustered flowers. Pedicel 3-4 mm. Flowers 0.9-1.2 cm. Calyx ca. 4 mm; teeth triangular, shorter than tube. Corolla pale red to scarlet; standard oblong, distally outside somewhat pubescent, apex retuse. Ovary pubescent, with 5 ovules. Legume linear, 5-10 × 1-1.5 cm, flat, gray pubescent but glabrescent; valves subleathery. Seeds 2-4 per legume, brown, ellipsoid, ca. 1 cm. Fl. Apr-Aug, fr. Jun-Oct.
Open places of lowland woodlands, thickets, grasslands, sparse or mixed woodlands, woodland margins; near sea level to 1700 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Jiangxi, S Taiwan, Yunnan [India, Laos, Myanmar, Vietnam].