Paul Sydow

Paul Sydow (1 November 1851 in Kallies – 26 February 1925 in Sophienstädt near Ruhlsdorf) was a German mycologist and lichenologist, father of Hans Sydow (1879–1946).

He worked as a schoolmaster in Berlin. With his son, Hans, he authored works involving descriptions of new species of ascomycetes, rusts and smuts. Paul Sydow was a prolific author (or co-author) of new fungal species, having formally described 2331 in his career. He also wrote about algae. He authored 252 works in five languages.