Book excerpt: Muenscher was an early Cornell botany professor known as the "Wizard of Weeds." This first update since 1950 of his classic volume on eastern North American botany updates the changing nomenclature--the bane of many students, amateurs, and professionals--applied by the International Botanical Congress. There are comprehensive and field-oriented keys to genera and species, and a systematic list of species in the keys. Includes the preface to the 1922 edition, a glossary, diagrammatic guide to terms (the text's only visuals), and a briefly annotated bibliography. Cope is also a Cornell U. botanist. Annotation copyrighted by Book News Inc., Portland, OR