An indispensable illustrated source of information for hundreds of species of North American trees

W. John Kress is Distinguished Scientist and Curator Emeritus at the Smithsonian’s National Museum of Natural History, where he served as Curator of Botany. His research has taken him to over forty-five countries to study the evolution and ecology of tropical plants. He developed the Leafsnap plant identification app and helped to develop the tool for DNA barcoding of plants. He lives in Dorset, VT. Lonnie G. Bunch III is the 14th Secretary of the Smithsonian Institution. He lives in the District of Columbia. Margaret D. Lowman is executive director of TREE Foundation and a National Geographic Explorer. Her books include The Arbornaut: Discovering the Eighth Continent in the Trees above Us. She lives in Sarasota, FL.