Ethnobotanist Richard Evans Schultes, one of the most important plant explorers of the 20th century, served as a key inspiration in a recent film called “Embrace of the Serpent.” In December 1941, Schultes entered the Amazon to study how indigenous peoples used plants for medicinal, ritual, and practical purposes. After nearly a decade of fieldwork, he made significant discoveries about the sacred hallucinogen ayahuasca. In total, Schultes would collect more than 24,000 species of plants including some 300 species new to Western science.