Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0068244
F. Petrak #s.n. 08 June 1923
Cytospora ambiens Sacc.
Czech Republic, Mahr-Weisskirchen: Teplitz
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USDA United States National Fungus Collections
Catalog #: BPI 364533
Petrak F. s.n. 16 August 1923
Cytospora ambiens f. spiraeae
Czechoslovakia, Hranice (Maehr.-weisskirchen), Teplice
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