Thümen, Fungi Austr. Exs.
F.K.A.E.J. de Thümen [1-1200]

University of Illinois Herbarium
Catalog #: ILL00085897
de Thümen s.n.
Oidium fusisporioides f. brassicae Fr.
Czech Republic, Bohemia, Konigswald; Konigswald

Rutgers University, Chrysler Herbarium - Mycology Collection
Catalog #: CHRB-F-0012643
De Thumen s.n.
Oidium fusisporioides Fuckel
Czech Republic, Bohemia

USDA United States National Fungus Collections
Catalog #: BPI 409491
Thuemen s.n.
Oidium fusisporioides f. brassicae
Czechoslovakia, formerly Austria Bohemia, Libouchec (Koenigswald)