Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0077218
s.n.
Plasmopara humuli (Miyabe & Takah.) Sacc.
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USDA United States National Fungus Collections
Catalog #: BPI 785703
Petrak, F. s.n. 21 June 1924
Pseudoperonospora humuli (Miyabe & Takah.) G.W. Wilson
Czechoslovakia, Mahr.-Weisskirchen, Skalicka
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