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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0082275
s.n.
Sclerophoma betulae Died.

USDA United States National Fungus Collections
Catalog #: BPI 359157
Petrak J. s.n. 14 December 1918
Sclerophoma betulae Died.
Czechoslovakia, Hranice (Maehr.-weisskirchen) Military Academy