Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0072195
s.n.
Libertella betulina Desm.
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USDA United States National Fungus Collections
Catalog #: BPI 401822
Petrak J. s.n. 14 December 1918
Libertella betulina Desm.
Czechoslovakia, Moravia, Hranice (Maehr.-weisskirchen) Military Academy
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