F.K.A.E.J. de Thümen [1-750, plus extras]
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University of Illinois Herbarium
Catalog #: ILL00085279
s.n.
Oidium lactis Fresen.
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University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00061078
von Thumen s.n. 00 September 1877
Oidium lactis Fresen.
Germany
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