Small evergreen or deciduous tree 6 to 9 m tall, with low multiple branches. Leaves to c. 25 cm long, obovate, arranged in clusters on branches. Flowers 5-6.5 cm long borne singly on stout stalks on trunk and branches, light green, bell-shaped. Fruits large, globose to ovoid, 10-30 cm diameter, green ripening brown with very hard skin.