Sir John Bretland Farmer FRS[1] FRSE (5 April 1865 – 26 January 1944) was a British botanist.
[3] He won a place at Magdalen College, Oxford, graduating MA in 1887.
[4] He was made a Fellow of Magdalen College 1889–1897, demonstrator of botany in 1887–1892, and assistant professor of biology in 1892–1895 at Oxford, and then became professor of botany at Imperial College London.
[7] Farmer published particularly on cytology, with his earliest paper on the topic appearing in 1893.
He was also editor of the John Murray–published journal, Science Progress in the Twentieth Century (1909–1912), and Gardeners' Chronicle (1904–1906).