USDA United States National Fungus Collections
s.n.
Sphaerotheca humuli (DC.) Burrill
Germany
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USDA United States National Fungus Collections
Vill A. s.n. 00 September 1908
Sphaerotheca humuli var. fuliginea (Schltdl.) E.S. Salmon
Germany, Unterfranken, Gerolzhofen
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