Walter Gardiner, FLS, FRS (1 September 1859 – 31 August 1941) was a British botanist. He was educated at Bedford School and at Clare College, Cambridge, and was a Fellow there and Lecturer in Botany at the University. He was a Fellow of the Linnean Society of London, and was elected a Fellow of the Royal Society in 1890. He was awarded the Royal Society's Royal Medal in 1898: "For his researches on the protoplasmic connection of the cells of vegetable tissues and on the minute histology of plants."
- Hill, A. W. (1941). "Walter Gardiner. 1859-1941". Obituary Notices of Fellows of the Royal Society 3 (10): 985–926. doi:10.1098/rsbm.1941.0046.
- "Gardiner, Walter (GRDR878W)". A Cambridge Alumni Database. University of Cambridge.
- Royal archive winners Prior to 1900, Royal Society, accessed 22 March 2010
- Entry for Gardiner in the Royal Society's Library and Archive catalogue's details of Fellows (accessed 23 April 2008)