F.K.A.E.J. de Thümen [1-2300, plus extras]

University of Illinois Herbarium
Catalog #: ILL00077202
s.n.
Sphaerotheca niesslii Thüm.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00041847
Thumen #s.n. 00 September 1879
Sphaerotheca niesslii ThÙm.
Austria, Kalksburg