Hallucinogenic plants have been used by man for thousands of years, probably since he began gathering plants for food. The hallucinogens have continued to receive the attention of civilized man through the ages. Recently, we have gone through a period during which sophisticated Western society has " discovered" hallucinogens, and some sectors of that society have taken up, for one reason or another, the use of such plants. This trend may be destined to continue. It is, therefore, important for us to learn as much as we can about hallucinogenic plants. A great body of scientific literature has been published about their uses and their effects, but the information is often locked away in technical journals. The interested layman has a right to sound information on which to base his opm1ons. This book has been written partly to provide that kind of information. No matter whether we believe that man's intake of hallucinogens in primitive or sophisticated societies constitutes use, misuse, or abuse, hallucinogenic plants have undeniably played an extensive role in human culture and probably shall continue to do so. It follows that a clear understanding of these physically and socially potent agents should be a part of man's general education.