National Audubon Society.

"From the creators of the world's most trusted field guides--a go-to source for millions of nature lovers--comes a completely new and unparalleled reference work: the most comprehensive, authoritative, and up-to-date guide to the trees of North America. This master guide is the result of a collaboration between leading scientists, scholars, taxonomic and field experts, photo editors, and designers. An indispensable reference, it covers more than 700...