Rabenhorst, Fungi Eur. Exs.
G.L. Rabenhorst [1-2600]

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0082791
R. Staritz #s.n. 00 October 1874
Sphaerotheca humuli var. fuliginea (Schltdl.) E.S. Salmon