Petrak, Crypt. Exs.F. Petrak [3201- 4700]
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USDA United States National Fungus Collections
Catalog #: BPI 1042957
s.n.
Sphaerotheca humuli (DC.) Burrill
Hungary
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USDA United States National Fungus Collections
Catalog #: BPI 604854
Norrman C. M. s.n. 18 July 1960
Sphaerotheca humuli (DC.) Burrill
Switzerland, Tessin, Lugano District, Comano
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