F.K.A.E.J. de Thümen [1-750, plus extras]
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University of Illinois Herbarium
Catalog #: ILL00085115
s.n.
Oidium leucoconium Desm.
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USDA United States National Fungus Collections
Catalog #: BPI 1033869
s.n.
Oidium leucoconium Desm.
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University of Nebraska State Museum, C.E. Bessey Herbarium - Fungi
Catalog #: NEB00061080
Bertha von Thumen s.n.
Oidium leucoconium Desm.
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