''Coula edulis'' is a

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

in the genus '' Coula'', native to tropical western

Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...

from

Sierra Leone Sierra Leone,)]. officially the Republic of Sierra Leone, is a country on the southwest coast of West Africa. It is bordered by Liberia to the southeast and Guinea surrounds the northern half of the nation. Covering a total area of , Sierra ...

Angola , national_anthem = "Angola Avante"() , image_map = , map_caption = , capital = Luanda , religion = , religion_year = 2020 , religion_ref = , coordina ...

. It is plentiful in the

Democratic Republic of Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...

Nigeria Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of G ...

and Sierra Leone. It prefers tropical regions and is tolerant of light shade. It can be found in the top canopy of forest as well as the lower story and has no special soil requirements. It is an

evergreen In botany, an evergreen is a plant which has foliage that remains green and functional through more than one growing season. This also pertains to plants that retain their foliage only in warm climates, and contrasts with deciduous plants, which ...

tree growing to a height of 25–38 m, and has a dense crown that can cast deep shade. The leaves are arranged alternately, simple, 10–30 cm long and 4 cm broad, with an entire margin and an acuminate apex. The

flower A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants (plants of the division Angiospermae). The biological function of a flower is to facilitate reproduction, usually by providing a mechanism ...

s are produced from April to June, and are greenish yellow, with either four or five petals. 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 and African walnut. It is not related to the

walnut A walnut is the edible seed of a drupe of any tree of the genus '' Juglans'' (family Juglandaceae), particularly the Persian or English walnut, '' Juglans regia''. Although culinarily considered a "nut" and used as such, it is not a tru ...

, being so named because its nuts bear a superficial resemblance to the walnut. ;Local names *Anamemila, Apopo, Sida in

*Bombulu in

Zaire Zaire (, ), officially the Republic of Zaire (french: République du Zaïre, link=no, ), was a Congolese state from 1971 to 1997 in Central Africa that was previously and is now again known as the Democratic Republic of the Congo. Zaire was, ...

*Dibetou in

Gabon Gabon (; ; snq, Ngabu), officially the Gabonese Republic (french: République gabonaise), is a country on the west coast of Central Africa. Located on the equator, it is bordered by Equatorial Guinea to the northwest, Cameroon to the north ...

and

Ivory Coast Ivory Coast, also known as Côte d'Ivoire, officially the Republic of Côte d'Ivoire, is a country on the southern coast of West Africa. Its capital is Yamoussoukro, in the centre of the country, while its largest city and economic centre is ...

*Mpengwa in

Ghana Ghana (; tw, Gaana, ee, Gana), officially the Republic of Ghana, is a country in West Africa. It abuts the Gulf of Guinea and the Atlantic Ocean to the south, sharing borders with Ivory Coast in Ghana–Ivory Coast border, the west, Burkina ...

;Dialect names *Akiouhia in Tchaman *Atsan in Atié *Bogüe in Agni *Howôtou in Oubi *Ouatou in Kroumen *Séatou or Sratou in

Guéré Guéré (Gere), also called Wè (Wee), is a Kru language spoken by over 300,000 people in the Dix-Huit Montagnes and Moyen-Cavally regions of Ivory Coast. Phonology The phonology of Guere (here the Zagna dialect of Central Guere / Southern W ...

Uses

Every part of the tree is used in both raw and finished states. Its timber and nuts are used extensively. The bark is used locally to produce rinses or enemas for loin pains or kidney problems. The wood is used to make pilings for bridges and railway ties in addition to charcoal and standard construction.

Nuts

The nut is 50% fat of which 87% is oleic acid. The flavour is mild and is said to be between the flavour of hazelnuts and chestnuts. Used in a variety of ways it can be boiled, roasted and fermented before being eaten. The nuts can be used in recipes and mixed with meats. It is also a source of cooking oil and ground flour. The nut is a favoured food item of chimpanzees, though the tough shell necessitates the use of a rock as hammer to gain access to the kernel.

References

*Davidson, Alan. Oxford Companion to Food (1999). Gabon Nut, p. 328.
Agro Forestry Database: ''Coula edulis''
{{Taxonbar, from=Q2998754 Edible nuts and seeds Flora of West Tropical Africa Trees of Africa Olacaceae Taxa named by Henri Ernest Baillon Plants described in 1862