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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0080278
F. Petrak #s.n. 29 April 1921
Pyrenophora penicillus (J.C. Schmidt ex Fr.) Sacc.
Czech Republic, Mähr-Weisskirchen: Hrabuvka