[Inner Traditions] World-renowned anthropologist and ethnopharmacologist Christian Ratsch provides the latest scientific updates to this classic work on psychoactive flora by two eminent researchers. • Numerous new and rare color photographs complement the completely revised and updated text. • Explores the uses of hallucinogenic plants in shamanic rituals throughout the world. • Cross-referenced by plant, illness, preparation, season of collection, and chemical constituents. Three scientific titans join forces to completely revise the classic text on the ritual uses of psychoactive plants. They provide a fascinating testimony of these "plants of the gods," tracing their uses throughout the world and their significance in shaping culture and history. In the traditions of every culture, plants have been highly valued for their nourishing, healing, and transformative properties. The most powerful of those plants, which are known to transport the human mind into other d