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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0077398
s.n.
Polyporus borealis Fr.

USDA United States National Fungus Collections
Catalog #: BPI 204547
Piskorz J. s.n. 00 September 1923
Polyporus borealis Fr.
Czechoslovakia, Sternberk in Moravia Coal Depot