Description from Flora of China
Trees 8-25 m tall. Leaves 40-100 cm; petiolule ca. 1 cm; leaflets elliptic, ovate, or ovate-oblong, (2-)5-7 X 1.5-4 cm, glabrous, base rounded, oblique, margin entire, apex acuminate; lateral veins 4 or 5 on each side of midrib. Inflorescences cymose-paniculate, ca. 25 cm in diam.; peduncle and pedicels pale yellow pubescent; bracts and bractlets deciduous. Pedicel slender, ca. 1 cm. Calyx small, cupular, 2-4 X 2-4 mm, sinuo- late lobed; lobes slightly reflexed. Corolla white, tube 3-7 cm, 2-3 mm in diam. at base; lobes globose in bud, ovate-lanceolate at anthesis, 1-2 cm, densely pubescent along margin adaxially. Ovary glabrous; ovules numerous, 4-rowed. Capsule linear, 30-35 X 1-1.5 cm, compressed. Seeds discoid-oblong, compressed, including wing 1.5-3.5 X 1-1.5 cm, surrounded by membranous and transparent wings. Fl. Sep-Dec. 2n = 30.
Low altitude slopes; 500-1200 m. S Yunnan [Cambodia, Laos, Myanmar, Thailand, Vietnam; commonly cultivated throughout India, Indonesia, and Malaysia, occasionally naturalized].