A large tree. It grows 30-40 m high. Trees are smaller in drier areas. The trunk is straight and 60-80 cm across. It can have buttresses. The bark is grey and has fine cracks. The leaves are simple and arranged in spirals along the small branches. The leaves are broadest near the middle. They are 4-18 cm long by 2-7 cm wide. They taper to the tip. They are dark green on the upper surface and more pale underneath. The flowers are at the ends of the branches. Flowers are white or pale yellow. The fruit are 4-6 cm long. The fruit are brown with a rough surface. There is one or two seeds. These are narrowly oval. There are about 3 subspecies.