Petrak, Fl. Bohem. Morav. Exs. Pilze
F. Petrak [1-2575]

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0081954
F. Petrak #s.n. 15 October 1923
Septoria humuli Westend.
Czech Republic, Mähr-Weisskirchen: Milotitz