An enthusiastic and terrifically illustrated history of botany and botanical nomenclature by the author of Tulips. Though Carl von Linne (nee Linneaeus) usually gets all he credit, Pavors reveals the contributions of John Ray, Nehemiah Grew and others lost to history in determining how plants are related. Pavord (The Tulip) is a fluid, engaging writer and the full-color botanical illustrations, from the 16th century and beyond, are exceptional.  (NAT91, $45.00)