Description from Flora of China
Dalbergia discolor Blume ex Miquel; D. mengsuoensis Y. Y. Qian.
Woody climbers, sometimes erect shrubs or small trees, 4-6(-10) m tall. Leaves 10-20 cm; rachis and petioles puberulent; leaflets 5-9; petiolules puberulent; blade ovate, obovate, or elliptic, (3-)5-8 × (2-)2.5-5 cm, firmly papery, abaxially sparsely puberulent, adaxially glabrous and with dense, prominent veinlets, base rounded or broadly cuneate, apex acute, obtuse, or emarginate, cuspidate. Panicles terminal or sometimes extending into axils of uppermost leaves, 5-25 × 4-12 cm, with cymose, dichotomous branches. Flowers minute, ca. 3 mm; bracts and bracteoles persistent, ovate-lanceolate, ca. 1/2 as long as calyx tube. Calyx campanulate, 5-toothed; teeth subequal, rounded or obtuse except lowest rather longer and lanceolate. Corolla white or yellowish green; petals shortly clawed; standard obovate-oblong, emarginate; wings obovate or elliptic; keel half-moon-shaped. Stamens 9(or 10), monadelphous. Ovary stipitate, oblong, puberulent, 1- or 2-ovuled; style short. Legume oblong or sometimes elliptic, 5-8 × 2-4 cm, leathery, glabrous, reticulate throughout but strongly so opposite 1(or 2) seeds, base broadly cuneate, apex acute or obtuse. Seeds reniform, much compressed, ca. 12 × 6 mm; testa brown, shiny. Fl. Apr-Jun, fr. Jul-Dec.
Forests, open forests, mountain slopes, ravines, riversides; 800-1700 m. Yunnan [NE India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].