John McLean Thompson FRSE FLS (1888–1977) was a 20th-century Scottish botanist.
He was born in Rothesay on the isle of Bute in western Scotland on 22 July 1888, the son of Hugh Thompson.
He was educated at Rothesay Academy then studied Science at Glasgow University graduating MA in 1908 and BSc in 1911.
[2] In the First World War he was attached to various military hospitals as a protozoologist studying infected wounds.
In 1921 he was created Professor of Botany at Liverpool University and remained in that role until retiral in 1952.