F.K.A.E.J. de Thümen [1-750, plus extras]

University of Illinois Herbarium
Catalog #: ILL00085279
s.n.
Oidium lactis Fresen.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00061078
von Thumen s.n. 00 September 1877
Oidium lactis Fresen.
Germany