Coula edulis is a tree in the genus Coula, native to tropical western Africa from Sierra Leone to Angola. It is plentiful in the Democratic Republic of Congo, Nigeria and Sierra Leone. The nut is an ellipsoidal drupe available from August to January, 3-4 cm long, with flesh surrounding the kernel, 5-6 mm thick, smooth in texture and can be red or green. The kernel shell is extremely hard and makes germination difficult. The nuts are usually found under the mother trees.Common names include Gabon Nut, African Walnut, Congowood, Tigerwood. It is not related to the Walnut, being so named because its nuts bear a superficial resemblance to the Walnut.