All at the forestry and natural resources department at Purdue University, Weeks (tree identification), Harmon P. Weeks (habitat management), and George Parker (emeritus, old-growth forests) expand the 2005 first edition to include 12 non-native species that have become problematic, and may be confused with natives. Some of the information is corrected or updated and some new photographs added. The keys have also been revised to incorporate the new species. An illustrated glossary is provided. Conifers come first, then hardwoods, and finally introduced species. Range maps and color photographs of identifying features accompany text on form and size, habitat, wildlife uses, landscaping value, and similar species. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)