Theo Holm


Herman Theodor "Theo" Holm 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.

Biography

Herman Theodor Holm was born in Copenhagen, Denmark.
He studied botany at the University of Copenhagen under professor Eugenius Warming and graduated 1880. In 1882-1883, he participated in the expedition on board the Danish vessel Dijmphna to the territory between Russia and the North Pole during the First International Polar Year. The ship was icebound for a period in the Kara Sea.
He also explored the flora of West Greenland as assistant to Eugenius Warming on the Fylla expedition in 1884.
He emigrated to the U.S., landing in New York City on April 12, 1888. He soon was employed as assistant botanist by the U.S. National Museum. In 1893 when he received American citizenship. From 1893-1897, he was assistant pathologist with the United States Department of Agriculture. He obtained his Ph.D. in botany from the Catholic University of America in Washington D.C. in 1902. 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. Although a Lutheran, in 1932 he joined the faculty of the Catholic University of America, but died soon after.

Honors

The small-reed species Calamagrostis holmii Lange is named for him.

Selected scientific works

The title probably alludes to the title of the first work on plant life-form, Om Skudbygning, Overvintring og Foryngelse by Eugen Warming, Holm's former mentor in Copenhagen, who had died the year before. At the end of the second part, Holm gives a list of all his papers on life form - related morphology and anatomy of American plants, ordered by genus.

Note