American phytopathologist and mycologist.
Alma May Waterman (1893-1977) was an American botanist, mycologist, and plant pathologist noted for studying diseases of shade and ornamental trees, as well as diseases of roses. She did research on Septoria cankers, specifically that affect poplar trees, in the 1950s. The standard author abbreviation Waterman is used to indicate this person as the author when citing a botanical name.