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

University of Illinois Herbarium
Catalog #: ILL00085095
s.n.
Microsphaeria friesii

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00045638
de Thumen s.n. 00 September 1873
Cercospora chenopodii Fresen.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00059772
Thumen s.n. 00 September 1874
Microsphaera friesii Lév.
Germany, Bayern: bei Bayreuth