This is a comprehensive field guide to the milk mushrooms of North America. Featuring over 150 species and varieties, this volume includes detailed descriptions and more than 250 rich color photographs. The photographs were selected for high-quality color fidelity, documentary merit, and the aesthetic appeal of the subject. The number of species described and illustrated in color, some for the very first time, is substantially more than has previously appeared in any other single work devoted to the milk mushrooms of North America. With accurate, detailed, and easy-to-follow descriptions, this volume is ideally suited for both amateur mushroom enthusiasts and professional mycologists. In addition to the descriptions and illustrations, it includes sections devoted to the features and process of identification, to the ecology of milk mushrooms, and to the edibility of members of the genus Lactarius. Additional sections for species related to Lactarius and hyperparasites of the genus are included in this field guide.