The "Atlas of United States Trees" is a comprehensive resource that provides detailed maps of the natural distribution of native tree species in the continental United States, including Alaska. Volume 1 focuses on conifers and important hardwoods, covering 200 species. The atlas includes base maps of the United States and North America, overlays showing environmental details such as rivers, physical subdivisions, topographic relief, plant hardiness zones, growing seasons, precipitation, climates, glacial extent, and major forest types. The maps are designed to be easily referenced by scientific and common names, with each species having a separate map. The atlas aims to provide clear and graphical representations of tree distributions, which are more effective than written summaries. It is intended for use by foresters, botanists, and others interested in trees, and it is available without restriction due to U.S. Government publications not being copyrighted. The atlas is part of a larger project to create a highly accurate and widely accepted set of maps over several years. The introduction provides historical context, explaining the evolution of tree distribution maps and the methods used to compile the current atlas. The explanation of the maps details the sources and limitations, emphasizing the focus on natural distribution rather than introduced or planted populations. The atlas also includes notes on ranges, noting that conifers are more prevalent in the Western United States compared to the Eastern states.The "Atlas of United States Trees" is a comprehensive resource that provides detailed maps of the natural distribution of native tree species in the continental United States, including Alaska. Volume 1 focuses on conifers and important hardwoods, covering 200 species. The atlas includes base maps of the United States and North America, overlays showing environmental details such as rivers, physical subdivisions, topographic relief, plant hardiness zones, growing seasons, precipitation, climates, glacial extent, and major forest types. The maps are designed to be easily referenced by scientific and common names, with each species having a separate map. The atlas aims to provide clear and graphical representations of tree distributions, which are more effective than written summaries. It is intended for use by foresters, botanists, and others interested in trees, and it is available without restriction due to U.S. Government publications not being copyrighted. The atlas is part of a larger project to create a highly accurate and widely accepted set of maps over several years. The introduction provides historical context, explaining the evolution of tree distribution maps and the methods used to compile the current atlas. The explanation of the maps details the sources and limitations, emphasizing the focus on natural distribution rather than introduced or planted populations. The atlas also includes notes on ranges, noting that conifers are more prevalent in the Western United States compared to the Eastern states.