Based on the proceedings of the 17th AETFAT Congress held in Addis Abbaba, Ethiopia, this book brings together sixty research papers in separate sections on taxonomy, forests and forestry, phytogeography, ecology, and the conservation and sustainable use of African plants. Also included are papers on recent advances in species and generic concepts, biological diversity, and the threatened and endangered plants of Africa. A separate section on African floras reflects the present state of knowledge and progress towards our understanding and documentation of the plants of Africa.