The Medico-Botanical Society of London (or the Royal Medico-Botanical Society of London) was a society founded in 1821 by John Frost, as director, for the avowed purpose of "investigating, by means of communications, lectures, and experiments, the medicinal properties of plants ... of promoting the study of the vegetable materia medica of all countries ... and of cultivating medical plants." The Society's meetings were held at 32, Sackville Street. The first president was William George Maton, MD, FRS. His successors as president were Robert Bree, MD, FRS, the surgeon Sir James McGrigor, FRS, and Philip Henry Stanhope, 4th Earl Stanhope, FRS.