Richard Evans Schultes was an eminent ethnobotanist who spent years studying the traditional plant knowledge of indigenous peoples in Central and South America. This field notebook, written during Schultes' time in Oaxaca, Mexico in 1938, provides a fascinating insight into his research process and the knowledge he gathered from interactions with local healers. Anyone interested in ethnobotany, anthropology, or indigenous cultures will find this book to be a treasure trove of information. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.