Paul Frédéric Culmann (23 February 1860, Zürich – 27 November 1936, Paris) was a Swiss physicist known for contributions made in the field of bryology.
From 1878 to 1882 he studied physics at the Eidgenössischen Polytechnikum in Zurich, then continued his education in Berlin, where he earned his PhD in 1885.
Following graduation, he was employed at the "Maison Bréguet" in Paris (1885–93), and later worked as an instructor of physics and mathematics at the Technikum Winterthur (1893–98).
[1] The moss species Bryum culmannii is named after him, being circumscribed by Karl Gustav Limpricht in 1892.
[1] With Jules Amann and Charles Meylan, he was co-author of Flore des mousses de la Suisse, (Lausanne : Imprimeries R'eunies S.A., 1912).