The author of the book Historia Plantarum is Theophrastus. He was a Greek philosopher and naturalist who studied under Aristotle. Historia Plantarum is one of the earliest comprehensive works on botany and is considered a foundational text in the study of plants. In this work, Theophrastus describes various plant species, their characteristics, uses, and cultivation methods. He categorized plants based on their growth habits and properties, such as trees, shrubs, and herbs. His methodical approach to studying plants set a precedent for future botanical research. Theophrastus’s Historia Plantarum remains an important historical document that showcases his significant contributions to the field of botany and the scientific method. His work influenced subsequent generations of botanists and natural philosophers, earning him recognition as the father of botany.