The Arbor Day Foundation has a booklet that identifies trees in a simple, step-by-step process. The booklet “What Tree Is That?” is available for a $5 donation to the nonprofit, tree-planting organization.“What Tree Is That?” is a fun, easy-to-use tree identification guide that features hand-drawn botanical illustrations highlighting the distinctive characteristics of many tree species.Nature lovers and professional arborists alike have called this pocket field guide one of the most user-friendly resources. Its beautiful, full-color illustrations are in precise detail to depict natural colors, shapes and textures so users can make a positive species identification in just a few easy steps.The Arbor Day Foundation offers this booklet to help people identify trees in Maine and throughout the eastern and central regions of the United States. “What Tree Is That?” uses a step-by-step approach to identify the species of each tree. The booklet explains what to look for in the shape of the leaves, differences in the leaf stems and twig structures, specifics on the fruits and flowers, and the details of buds and bark.“What Tree is That?” is also available in an online interactive version at arborday.org. The Arbor Day Foundation offers this online tool so people can identify trees using the Internet.To obtain a tree identification guide in full color, send your name, address and $5 for each guide to “What Tree Is That?,” Arbor Day Foundation, Nebraska City, NE 68410. You can also order the book online at arborday.org.