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

USDA United States National Fungus Collections
Catalog #: BPI 603562
Steppan R. s.n. 00 January 1913
Sphaerotheca pannosa (Wallr.) Lév.
Czechoslovakia, Bohemia, Luditz, Krasch