A small to medium-sized tree up to 20 m tall. Leaves 3-5-verticillate, elliptical-obovate to elliptical, 7-26 cm x 3-5 cm, petiole thin, up to 3 cm long. Flowers with campanulate-infundibuliform corolla tube 2-3 times the length of the calyx. Fruit subglobose with a broad obtuse base.