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The Useful Trees of Northern Nigeria" by Hugh Vandervaes Lely is a scientific publication written in the early 20th century. This work focuses on the identification and description of various tree species found in the savannah forests of Northern Nigeria, providing practical information on their characteristics and uses. It is intended as a resource for botanists, conservationists, and individuals interested in the ecological significance of these trees in their local environment.

The opening of the book presents a preface outlining the author's goals in compiling the text, emphasizing the need for a pragmatic guide rather than a comprehensive flora. Lely explains that the volume includes a selection of 120 species arranged in alphabetical order, with details on their morphology, habitat, and economic uses. This structure allows for easy identification and reference, complemented by drawings showcasing various aspects of each species, including bark, leaves, flowers, and fruits. The author also touches upon the ecological context of the savannah forests, discussing their varying compositions and the influence of human activity on these natural ecosystems.