Kosso or cusso refers to a type of shrub or small tree known scientifically as Hagenia abyssinica. This plant species is native to the highlands of East Africa, particularly Ethiopia, Kenya, and Uganda. It belongs to the botanical family Rosaceae. The term "kosso" is commonly used in Ethiopia, while "cusso" is more prevalent in Kenya and Uganda.
The kosso plant typically grows to a height of around 10 to 15 meters (33 to 49 feet) and exhibits a dense, spreading habit. It possesses pinnate leaves with serrated edges and small, fragrant white or pinkish flowers that form in dense, pyramidal clusters. The fruit of the kosso tree is a small, rounded capsule containing several seeds.
Kosso or cusso is known for its medicinal properties and has been used in traditional African medicine for centuries. The bark and leaves of the plant contain a chemical compound called kosinol, which is known for its anthelmintic properties. Anthelmintics are substances that can expel or destroy parasitic worms from the body. As such, kosso or cusso has long been used to treat gastrointestinal parasitic infections, particularly those caused by species of roundworms.
In addition to its medicinal uses, kosso or cusso is also valued for its timber, which is dense and durable. The wood is commonly used for construction, furniture-making, and various other purposes in East Africa.
Overall, kosso or cusso is a versatile plant species with notable medicinal and practical applications, making it an important part of the cultural heritage of East Africa.
