A medium sized tree with dark brown nearly smooth bark; young shoots pubescent. Leaves petiolate, petiole 2-3.8 cm long; lamina c. 4.5-15 cm long, as broad as or rather broader than long, with a medium cleft reaching from 1 /4 to 1/3 the way down, lobes obtuse, the base is deeply heart shaped, 9-15 nerved, pubescent beneath when young. Inflorescence few flowered pubescent raceme. Pedicel short or absent, bracteole minute; hypanthium slender, c. 1.2-2.5 cm long. Calyx 2.0-2.7 cm long, tomentose, 5 toothed at the apex. Petals 5-6.3 cm long, obovate, with long rather broad claw, all white or 4 petals pale purple and fifth darker with purple veins. Stamens 5, fertile, no staminodes. Ovary hairy, stipe 10-17 mm long; style long, stigma capitate. Pods 15.0-30 cm long, c. 1-2.5 cm broad, hard, flat, dehiscent 10-15 seeded; stipe glabrous.
Flowering Period: Feb.-April.