Wilhelm Fritz Mattick (17 May 1901 – 3 January 1984) was a German botanist specializing in moss research (bryology).
After he had already worked for some time at the Dresden University of Technology alongside his teaching activities as a research assistant, in 1931 he switched completely to scientific studies.
In 1959 Mattick founded the scientific journal Nova Hedwigia together with Johannes Gerloff, which focused on research on cryptogams such as mosses, lichens, fungi and algae; he was also the editor of Willdenowia magazine.
[2] Mattick built an index card catalog of lichen literature references published before 1950.
[4] Mattick has had several taxa named in his honour, including the genera Mattickiolichen Tomas.