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

USDA United States National Fungus Collections
Catalog #: BPI 409554
Petrak F. s.n. 15 September 1909
Oidium erysiphoides Fr.
Czechoslovakia, Moravia, Hranice (Maehr.-weisskirchen), Austy