Leopold Loeske (24 October 1865, Hohensalza – 29 March 1935, Bad Harzburg) was a German watchmaker and amateur bryologist.
A skilled watchmaker, he was self-taught as a bryologist, collecting moss specimens in Germany, Switzerland and the French Alps during his career.
Following World War I, he spent eight years working as a correspondent for a commercial institution due to financial struggles.
[2] He died at Bad Harzburg while on a collection excursion in the Harz Mountains.
[5][6] He was the author of 70 published works, including a highly regarded monograph on European Grimmiaceae, "Monographie der europäischen Grimmiaceen" (1930).