Prof David Leslie Hawksworth CBE, mycologist and lichenologist, Research Professor since 2001 at the Universidad Complutense de Madrid (Complutense University of Madrid), President from 1986-7 of the British Lichen Society, from 1990-1 of the British Mycological Society and from 1994-7 of the International Union of Biological Sciences, and Editor from 200-8 of Mycological Research
Charles Christian Plitt (born 6 May 1869 in Baltimore, Maryland, died there 13 October 1933) was a botanist and lichenologist.
Ferdinand Christian Gustav Arnold (1828–1901) was a German lichenologist and taxonomist born in Ansbach, Bavaria.
Julius von Flotow; full name- Julius Christian Gottlieb Ulrich Gustav Georg Adam Ernst Friedrich von Flotow (March 9, 1788- August 15, 1856) was a German military officer and lichenologist born in the village of Pitzerwitz (Polish-Pstrowice) in the region of Neumark.
Abramo Bartolommeo Massalongo, Italian paleobotanist and lichenologist; father of Caro Benigno Massalongo
Paul Sydow (author abbreviation P. Syd., 1851–1925), a mycologist and lichenologist, father of Hans