Book excerpt: The classic easy-reference field guide with more than 1500 photographs: “An almost foolproof practical reference book.” —Kirkus Reviews (starred review) This useful book for botanists, horticulturists, and nature lovers is made up of two parts: Pictorial Keys and Master Pages. The Keys are designed for easy visual comparison of details that look alike, narrowing the identification of a tree to one of a small group—the family or genus. Then, in the Master Pages, the species of the tree is determined, with similar details placed together to highlight differences within the family group, thus eliminating all other possibilities. All of the more than 1500 photographs were made specifically for use in this book and were taken either in the field or of carefully collected specimens. Where possible, details such as leaves, fruit, etc., appear in actual size, or in the same scale.