Ancient · Greece
Theophrastus
371 BCE-287 BCE
Their story
Why Theophrastus matters
Theophrastus compared how plants grow, reproduce and respond to their surroundings.
Theophrastus worked in Greece during the Ancient era. This was long before modern laboratories, printing or electronic instruments, so knowledge grew through observation, calculation, teaching and carefully copied texts.
Theophrastus's work in botany grew from asking a focused question and following the evidence. Sharing the result allowed other people to challenge it, improve it and apply it to new problems.
Key discovery or invention
Systematic studies of plants.
Theophrastus' central contribution was systematic studies of plants.
The contribution mattered because it changed a broad question into evidence that could be examined. Other researchers could repeat the observations, test the explanation and extend it in directions the original scientist could not yet explore.
Why it still matters: Its lasting value is the path it created for later researchers to ask better questions and gather stronger evidence. Theophrastus's work is one chapter in that continuing story rather than the final word.
He is often called the father of botany because two of his major plant books survived.