Pedanius Dioscorides (Πεδάνιος Διοσκουρίδης, Pedánios Dioskourídēs; 40–90 AD), "the father of pharmacognosy", was a Greek physician, pharmacologist, botanist, and author of De materia medica (Περὶ ὕλης ἰατρικῆς, On Medical Material) —a 5-volume Greek encyclopedia about herbal medicine and related medicinal substances (a pharmacopeia), that was widely read for more than 1,500 years. For almost two millennia Dioscorides was regarded as the most prominent writer on plants and plant drugs.
A native of Anazarbus, Cilicia, Asia Minor, Dioscorides likely studied medicine nearby at the school in Tarsus, which had a pharmacological emphasis, and he dedicated his medical books to Laecanius Arius, a medical practitioner there. Though he writes he lived a "soldier's life" or "soldier-like life", his pharmacopeia refers almost solely to plants found in the Greek-speaking eastern Mediterranean, making it likely that he served in campaigns, or travelled in a civilian capacity, less widely as supposed. The name Pedanius is Roman, suggesting that an aristocrat of that name sponsored him to become a Roman citizen.
De materia medica
Between AD 50 and 70 Dioscorides wrote a five-volume book in his native Greek, Περὶ ὕλης ἰατρικῆς (Perì hylēs íatrikēs), known in Western Europe more often by its Latin title De materia medica ("On Medical Material"), which became the precursor to all modern pharmacopeias.
In contrast to many classical authors, Dioscorides' works were not "rediscovered" in the Renaissance, because his book had never left circulation; indeed, with regard to Western materia medica through the early modern period, Dioscorides' text eclipsed the Hippocratic corpus.
In the medieval period, De materia medica was circulated in Greek, as well as Latin and Arabic translation.
While being reproduced in manuscript form through the centuries, it was often supplemented with commentary and minor additions from Arabic and Indian sources.