He is best known internationally for his comprehensive two-volume The Structure and Reproduction of the Algae; However his co-authored 1927 revised edition of G.S. West's A Treatise of the British Freshwater Algae of 1904 was also important.[3] He had a great influence through his own research and also his encouragement to students. As an aid to his own studies on algal taxonomy and morphology, Fritsch brought together published illustrations under the names of the species. After his death this was continued by Dr J.W.G.Lund at the Freshwater Biological Association and became The Fritsch Collection of Illustrations of Freshwater Algae.[4][5]
He was honoured in 1932, when botanist Mandeyam Osuri Parthasarathy Iyengar published Fritschiella, which is a genus of green algae in the family Fritschiellaceae and named after Felix Eugen Fritsch.[6]
^John, D.M., Whitton, B.A. and Brook, A.J. 2002. The Freshwater Algal Flora of the British Isles. Cambridge University Press, Cambridge. ISBN0-521-77051-3
^Lund, J.W.G.1961. The Fritsch Collection of Illustrations of Freshwater Algae. Phycologia1,193.
^Guiry, M.D.; Guiry, G.M. (2007). "Genus: Fritschiella taxonomy browser". AlgaeBase version 4.2 World-wide electronic publication, National University of Ireland, Galway. Retrieved 25 September 2007.