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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0006130
F. Petrak #s.n. 04 November 1923
Boletus luridus Viv.
, Hranice;

USDA United States National Fungus Collections
Catalog #: BPI 781034
Petrak, F. s.n. 04 November 1923
Boletus luridus Viv.
Czech Republic, Auf Waldboden Mahr-Weisskirchen, Olspitz