Enquiry into Plants and De Causis Plantarum by Theophrastus (ca. 370-ca. 285 BC) are a counterpart to Aristotle's zoological work and the most important botanical work of antiquity now extant. In the latter Theophrastus turns to plant physiology.
Theophrastus was a student, collaborator, and successor of Aristotle; his writings on plants form a counterpart to Aristotle's zoological works. In the Enquiry into Plants he classifies and describes varieties of plants; in De Causis Plantarum he turns to plant physiology. Books One and Two (in Volume I) discuss generation, sprouting, flowering, and fruiting.
