Description from Flora of China
Trees, 10-15 m tall, glabrous except for young shoots; inflorescence and ovary puberulent. Bark brown or pale brown, rough, longitudinally splitting; branchlets with small, dense lenticels. Leaves 12-25 cm; stipules caducous; petiole 1.5-3 cm; leaflets (7-)9-11(-13); petiolules 3-5 mm; blades ovate or elliptic, (2.5-)4-7(-9) × 2-3.5 cm, distal longest, basal pair ca. 1/3 as long as distal, subleathery, base rounded or broadly cuneate, apex obtuse to acuminate. Panicles axillary, 8-10 × 6-7 cm; peduncles 3-5 cm. Flowers ca. 5 mm, initially aggregated at apices of corymbose branches of inflorescence, lax afterward; bracts subtriangular, ca. 0.5 mm; bracteoles broadly ovate, ca. as long as ca. 1 mm pedicels. Calyx campanulate, ca. 2 mm, 5-toothed; lowest tooth lanceolate, longer than others, other teeth broadly ovate, acute. Corolla creamy white or pale yellowish; petals subequal in length, clawed; standard obcordate, ca. 5 mm including claw, ca. 3 mm wide, apex truncate, emarginate; wings oblong; keel half-moon-shaped, arcuate on lower side. Stamens 9, monadelphous. Ovary narrowly elliptic, 1- or 2-ovuled, with long stipe ca. 2.5 mm. Legume ligulate-oblong, 4.5-8 × 1.5-1.8 cm, leathery, apex obtuse or acute, base abruptly narrowed to slender 5-10 mm stipe; reticulation distinctly prominent opposite 1(or 2) seeds. Seeds reniform, compressed. Fl. Apr-Jun, fr. Jul-Dec.
● Open forests, mountain slopes, margins of forests or wastelands, beside villages; 100-500 m. Fujian, Hainan, Zhejiang.