Petrak, Fl. Bohem. Morav. Exs. Pilze
F. Petrak [1-2575]

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0075596
s.n.
Peronospora holostei Caspary

USDA United States National Fungus Collections
Catalog #: BPI 990994
s.n.
Peronospora holostei Caspary
Czech Republic