"Botany" and "Pharmacy" by Alain Touwaide, in: Handbook of medieval studies. Terms - methods - trends. Edited by Albrecht Classen. 3 vols.

This otherwise comprehensive handbook excludes medicine, per se. Sections most directly pertinent to the life sciences are:

Touwaide, Alain. "Botany". Vol. 1, pp. 145-180.

       This a very detailed bibliographical essay covering the history of Western and Arabic texts concerning botany and materia medica in the Middle Ages. Digital facsimile from Academia.edu at this link.

Touwaide, Alain. "Pharmacy". Vol. 2, pp. 1056-1089.

Touwaide, Alain. "Pharmaceutical literature." Vol. 3, pp. 1979-1999.