De Causis Plantarum, Volume III: Books 5–6

by Theophrastus, Benedict Einarson (Translator), George K. K. Link (Translator)

Theophrastus of Eresus in Lesbos, born about 370 BCE, is the author of the most important botanical works that have survived from classical antiquity. He was in turn student, collaborator, and successor of Aristotle. Like his predecessor he was interested in all aspects of human knowledge and experience, especially natural science. His writings on plants form a counterpart to Aristotle's zoological works.

In the Enquiry into Plants Theophrastus classifies and describes varieties—covering trees, plants of particular regions, shrubs, herbaceous plants, and cereals; in the last of the nine books he focuses on plant juices and medicinal properties of herbs. The Loeb Classical Library edition is in two volumes; the second contains two additional On Odours and Weather Signs.

In De Causis Plantarum Theophrastus turns to plant physiology. Books One and Two are concerned with generation, sprouting, flowering and fruiting, and the effects of climate. In Books Three and Four Theophrastus studies cultivation and agricultural methods. In Books Five and Six he discusses plant breeding; diseases and other causes of death; and distinctive flavours and odours.

Theophrastus's celebrated Characters is of a quite different nature. This collection of descriptive sketches is the earliest known character-writing and a striking reflection of contemporary life.

416 pages, Hardcover

First published January 1, 1990

About the author

Theophrastus (Greek: Θεόφραστος; c. 371 – c. 287 BC), a Greek native of Eresos in Lesbos, was the successor to Aristotle in the Peripatetic school. He came to Athens at a young age and initially studied in Plato's school. After Plato's death, he attached himself to Aristotle. Aristotle bequeathed to Theophrastus his writings and designated him as his successor at the Lyceum. Theophrastus presided over the Peripatetic school for thirty-six years, during which time the school flourished greatly. He is often considered the "father of botany" for his works on plants. After his death, the Athenians honoured him with a public funeral. His successor as head of the school was Strato of Lampsacus.

The interests of Theophrastus were wide ranging, extending from biology and physics to ethics and metaphysics. His two surviving botanical works, Enquiry into Plants[2] and On the Causes of Plants, were an important influence on medieval science. There are also surviving works On Moral Characters, On Sensation, On Stones, and fragments on Physics and Metaphysics. In philosophy, he studied grammar and language and continued Aristotle's work on logic. He also regarded space as the mere arrangement and position of bodies, time as an accident of motion, and motion as a necessary consequence of all activity. In ethics, he regarded happiness as depending on external influences as well as on virtue and famously said that "life is ruled by fortune, not wisdom."