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

University of Illinois Herbarium
Catalog #: ILL00085650
de Thümen s.n.
Erysiphe horridula f. echii Lev.
Czech Republic, Bohemia, Teplitz

USDA United States National Fungus Collections
Catalog #: BPI 563441
Thuemen s.n.
Erysiphe horridula (Wallr.) Rabenh.
Czechoslovakia, Bohemia, Teplitz