Book excerpt: A guide to the identification of all the woody plants (c. 2,250 species in 740 genera) of the forest region of West Africa called 'Upper Guinea', between Togo and Senegal. Upper Guinea is one of the world's most important centres of biodiversity, from the mountain forests of Liberia, Guinea and Sierra Leone, to the lowland evergreen, and semideciduous forests widespread also in Ghana and Ivory Coast. This comprehensively illustrated guide will play a vital supportive role in the challenge of sustainable development within the forest region of West Africa, helping to promote best practice in the management of its plants and forests.