Zahlbruckner, Krypt. Exs.A. Zahlbruckner [401-2600, plus extras]
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USDA United States National Fungus Collections
Catalog #: BPI 1041493
s.n.
Oidium quercinum Thüm.
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USDA United States National Fungus Collections
Catalog #: BPI 409737
Keissler C. de s.n. 00 July 0000
Oidium quercinum Thüm.
Austria, Styria, Landl, near Hieflau
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