Euphemia Cowan Barnett (1890–1970) was a Scottish botanist known for her research of the flora of Thailand, particularly Fagaceae.
[1] After graduation she worked as an assistant to Professors J. W. H. Trail and W. G. Craib at the university and studied the botanical specimens that Crab and Dr A.F.G.
When she returned to Aberdeen later in her career she continued her research into this collection an earned a DSc for her work in 1940.
[1] After she retired she received a research fellowship from the University of Aberdeen, and continued her research of Thai flora at both the university's herbarium and the Royal Botanic Garden, Kew, London.
[2] The genus Barnettia (Bignoniaceae) was named by Dr Santisuk in her honour.