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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0081305
J. Piskor #s.n. 00 August 1923
Ramularia pruinosa Speg.
Czech Republic, Sternberg in Mähren: Obergrund