Career
He was an expert on spermatophytes and the flora of north-east England. He was born in Girvan in Ayrshire the son of Thomas Clark. He attended Alva Academy 1916-1923 and then Harris Academy in Dundee 1923-1929.
He attended Street Andrews University gaining a Bachelor of Science in 1932 and a Doctor of Philosophy in 1936.
He lectured in Botany firstly at Liverpool University then at Newcastle University until retiring in 1976. He was elected a Fellow of the Royal Society of Edinburgh in 1957.
He died in Ryton, Tyne and Wear on 19 November 1983.
