John McEwan Dalziel (1872–1948) was a British physician, botanist, and plant collector.
From 1923 he was employed at the Royal Botanic Gardens, Kew, and from 1925 to 1927 he joined the botanical expedition aboard the research vessel Utowana led by botanist David G. Fairchild and funded by philanthropist Allison Vincent Armour.
The Fairchild expeditions of visited Sri Lanka, Sumatra and Java in 1926, and coastal West Africa, from Gambia to Bioko, in 1927.
[1] Dalziel was active as a plant collector from 1895 to 1927, and collected in China and in present-day Cameroon, Gambia, Ghana, Guinea, Liberia, Niger, Nigeria, and Sierra Leone in tropical Africa.
[2] With Arthur Hugh Garfit Alston and John Hutchinson, he edited the Flora of West Tropical Africa.