Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
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Wisconsin State Herbarium, Fungi
Catalog #: WIS-F-0077398
s.n.
Polyporus borealis Fr.
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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
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