Fragments of Martialis's work (probably called De hortis), which treated of the cultivation of trees and vegetables, and also of their medicinal properties, survived, chiefly in the body of and as an appendix to the Medicina Plinii (an anonymous 4th century handbook of medical recipes based upon Pliny the Elder, Naturalis Historiae, xx–xxxii). Extant sections treat of apples, peaches, quinces, citrons, almonds, chestnuts, parsnips, and various other edibles, with an emphasis on the medical effects they have on the body (quoting Dioscorides sometimes). (Adapted from Wikipedia article on Quintus Gargilius Martialis.) Digital facsimile of the 1875 edition from Google Books at this link.

De observatione ciborum ("On the Observance of Foods") by Anthimus, a Byzantine physician at the court of the Ostrogoth king Theodoric, concerns foods and their preparations as well as the use of foods for selected ailments such as dysentery, diarrhea, edema, and fever. It was edited by Valentine Rose from two 9th century codices in St. Gall and Bamberg, an 11th century manuscript at St. Gall, and a 12th century manuscript at Paris. Digital facsimile of the 1877 edition from the Internet Archive at this link. English translation by Mark Grant as Anthimus: On the observance of foods (1996).

Editio princeps. Cassius Felix was a Roman African medical writer, probably native of Constantina (now Algeria). His De medicina is a simple handbook for practical use, drawing on Greek medical sources. Digital facsimile from Google Books at this link.

Digital facsimile from the Internet Archive at this link.