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

Rutgers University, Chrysler Herbarium - Mycology Collection
Catalog #: CHRB-F-0006999
s.n.
Erysiphe horridula (Wallr.) Rabenh.
Czech Republic

University of Illinois Herbarium
Catalog #: ILL00086060
de Thümen s.n.
Erysiphe horridula f. lithospermi Lev
Czech Republic, Bohemia, Teplitz; Teplitz

USDA United States National Fungus Collections
Catalog #: BPI 561056
Thuemen s.n.
Erysiphe cichoracearum DC.
Czechoslovakia, Bohemia, Teplitz