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

University of Illinois Herbarium
Catalog #: ILL00085022
von Thumen s.n. 00 September 1874
Oidium erysiphoides Fr.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00061065
von Thumen s.n. 00 September 1874
Oidium erysiphoides Fr.
Germany