Abstract: Rabelais owned a copy of Théodore Gaza’s Latin translation of Theophrastus’s Historia plantarum (books VI to IX). After a material presentation of this volume (today at the French National Library, Rés. 8-TE142-29), which bears an ex-libris but no marginal annotation, the article studies the presence—explicit or implicit—of the “father of botany” in Rabelais’s fiction.