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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0080214
F. Petrak #s.n. 17 August 1923
Ramularia cardui P. Karst.
Czech Republic, Mähr-Weisskirchen: Neudeck