A Guide to the Trees, authored by Alice Lounsberry with illustrations by Ellis Rowan and contributions from Dr. N. L. Britton, is a comprehensive botanical reference first published around 1900. This extensive volume, spanning over 450 pages, serves as a detailed field guide to the trees of North America. It combines scientific accuracy with artistic expression, featuring 64 color plates, 164 black-and-white illustrations, and 55 diagrams to aid in the identification and appreciation of various tree species. ​

The book is structured to facilitate both scientific study and leisurely exploration. Each tree is presented with its botanical classification, common and scientific names, and descriptive details about its leaves, bark, flowers, and fruit. These descriptions are complemented by vivid illustrations that capture the unique characteristics of each species. The inclusion of diagrams further enhances the reader’s ability to understand and identify different trees in their natural habitats.​

Beyond its scientific content, A Guide to the Trees reflects the cultural and historical significance of trees in human society. It delves into the traditional uses of various tree species, highlighting their roles in medicine, construction, and daily life. This aspect of the book underscores the deep connection between humans and the natural world, emphasizing the importance of trees in our collective heritage.​

A Guide to the Trees stands as a testament to the enduring value of traditional botanical knowledge. Its meticulous documentation and artistic illustrations make it a valuable resource for botanists, naturalists, and anyone interested in the rich tapestry of North American flora. The book not only serves as a practical guide for tree identification but also fosters a deeper appreciation for the natural world and our place within it.