Coula edulis

Coula edulis, widely known as the African walnut or Gabon nut, is a perennial evergreen tree belonging to the Olacaceae family. It is a highly significant species in the tropical rainforest zones of West and Central Africa, where it is both harvested from the wild and occasionally cultivated.

The native distribution of this species spans from Sierra Leone to Angola. It thrives in humid tropical climates characterized by high annual rainfall and constant temperatures. The tree is an essential component of the lowland tropical forest structure, typically found in dense forest areas.

Botanically, Coula edulis can grow up to 30 meters in height. It features a straight, cylindrical trunk and a dense, dark green crown. The fruit is a drupe with a very hard, woody endocarp protecting the kernel. The tree typically blossoms with small flowers, and the fruit development takes several months to reach full maturity.

Regarding agrotechnical requirements, the tree prefers deep, well-drained, nutrient-rich soils. It is shade-tolerant during its seedling stage, which is a critical trait for its survival under the forest canopy. In agroforestry systems, protection from weed competition and sufficient moisture levels are essential for successful early-stage growth.

The primary economic use is the consumption of the seeds, which have a flavor profile similar to hazelnuts or walnuts. These seeds are rich in oils and proteins, serving as a staple food source for many rural communities. Additionally, the wood is renowned for its high density, hardness, and durability, making it highly valuable for construction and furniture manufacturing.

• High fat and protein content in the edible nuts.
• Excellent timber quality suitable for heavy-duty applications.
• Natural resilience against many forest pests.
• Role as a significant non-timber forest product (NTFP) for local economies.