Prof Francis John Lewis FRSE FRSC FLS (1875–1955) was an English botanist.
He studied Science at Liverpool University and specialised in Botany.
He remained in this role until 1935 when he made a further adventurous decision and moved to North Africa to become Professor of Botany at the University of Cairo.
His proposers were James Geikie, Robert Kidston, Cargill Gilston Knott and Leonard Dobbin.
He continued as a visiting lecturer in Plant Physiology at Royal Holloway College until 1948, at which point he finally retired.