Summary The enthusiasm of Renaissance humanists for classical learning greatly influenced the development of botany in the late fifteenth and sixteenth centuries. Humanist scholars restored the treatises of Theophrastus, Pliny, Galen and Dioscorides on botany and materia medica to general circulation and argued for their use as textbooks in Renaissance universities. Renaissance botanists' respect for classical precepts and models of the proper methods for studying plants temporarily discouraged the use of naturalistic botanical illustration, but encouraged other techniques for collecting and (...) communicating new observations: herbaria, botanical gardens and field trips. (shrink)