Petrak, Fl. Bohem. Morav. Exs. PilzeF. Petrak [1-2575]
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University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0075322
s.n.
Peronospora arvensis Gäum.
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USDA United States National Fungus Collections
Catalog #: BPI 990997
s.n.
Peronospora arvensis Gäum.
Czech Republic
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