A richly photographed and information-packed tool for the novice or handy reference for the veteran, Basic Illustrated Poisonous and Harmful Plants distills years of knowledge into an affordable visual guide. Whether planning a trip or thumbing for facts in the field, with this updated guide you'll discover how to identify and avoid poisonous, harmful, and psychoactive plants in the contiguous United States.BASIC ILLUSTRATED Poisonous and Psychoactive Plants identifies wild and cultivated plants that are:*; Toxic and dangerous*; Psychoactive*; Allergenic*; Inflammatory.