Herman Theodor Holm (February 3, 1854 - December 26, 1932) was a Danish-American systematic botanist, agriculturalist and plant pathologist.
His works dealt principally with plants from the Arctic and from the Rocky Mountains, mainly taxonomy and morphology.
He published over 150 papers reflecting his research which included his series Studies on the Cyperaceae and Medicinal Plants of North America.
[3] [4] He also explored the flora of West Greenland as assistant to Eugenius Warming on the Fylla expedition in 1884.
He then moved to the countryside of Brookland, DC and later in Clinton, Maryland and did assistant work as a botanist for the Smithsonian Institution and the USDA.