Crateuas was the personal physician of Mithridates VI. Of Pontos. He wrote a three-part herbal book describing the medicinal properties of plants. This work, which was illustrated, is the earliest known herbal book to include illustrations. The text was one of the main sources used by Dioscorides. Of Krateuas's work only two papyrus fragments have survived. ^[2] Digital facsimile of the Wellmann edition from the Internet Archive at this link.

Digital facsimile from the Internet Archive at this link.

Dioscorides’ work is the authoritative source on the materia medica of antiquity. He described over 600 plants and plant principles. The above edition by Wellman is the definitive Greek text. It also contains the Fragmenta of Krateuas. 

This work on venoms and their antidotes is the only surviving work of the Byzantine physician Philomenos. Within this context Philomenos also discusses the bites of rabid dogs. Digital facsimile from Corpus medicorum Graecorum / Latinorum at this link.