Trees up to 30 m tall. Leaves cordate-ovate; lamina 14-21 x 11.5-17 cm, entire-undulate, acuminate, glabrous, undersurface, (especially the veins) tomentose with yellowish hairs; petiole 4-12.5 cm long. Panicle 12.5-25 cm long. Corolla tube c. 3.5 cm long; lobes 5,subequal. Capsule 24-30 cm long; cylindrical. Seeds with wing 5.5-6 x 30-35 mm; wing acutish and laciniate at the end.