Theophrastus (; Ancient Greek: Θεόφραστος, romanized: Theophrastos, lit. 'godly phrased'; c. 371 – c. 287 BC) was an ancient Greek philosopher and naturalist. A native of Eresos in Lesbos, he was Aristotle's close colleague and successor as head of the Lyceum, the Peripatetic school of philosophy in Athens. Theophrastus wrote numerous treatises across all areas of philosophy, working to support, improve, expand, and develop the Aristotelian system. He made significant contributions to various fields, including ethics, metaphysics, botany, and natural history. Often considered the "father of botany" for his groundbreaking works "Enquiry into Plants" (Ancient Greek: Περὶ φυτῶν ἱστορία, romanized: Peri phytōn historia) and "On the Causes of Plants", (Ancient Greek: Περὶ αἰτιῶν φυτικῶν, romanized: Peri aitiōn phytikōn) Theophrastus established the foundations of botanical science. His given name was Tyrtamos (Ancient Greek: Τύρταμος); the nickname Theophrastus ("divine speaker") was reputedly given to him by Aristotle in recognition of his eloquent style.
He came to Athens at a young age and initially studied in Plato's school.
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