Anonymous, Krypt. Exs. [ 1- 100] ; Beck & Zahlbruckner, Krypt. Exs. [101 - 400]
G. Beck and A. Zahlbruckner [1-400, plus extras]

University of Illinois Herbarium
Catalog #: ILL00090071
s.n.
Podosphaera tridactyla (Wallr.) de Bary

USDA United States National Fungus Collections
Catalog #: BPI 1040716
s.n.
Podosphaera tridactyla (Wallr.) de Bary

USDA United States National Fungus Collections
Catalog #: BPI 603512
Pfeiffer P. A. (A); Strasser P. P. (b) s.n. 00 August 0000
Podosphaera oxyacanthae var. tridactyla (Wallr.) E.S. Salmon
Austria, Kremsmuenster (A), Lower Austria, Sonntagsberg, near Rosenau (B)

USDA United States National Fungus Collections
Catalog #: BPI 603524
Pfeiffer P. A. (A); Strasser P. P. (b) s.n. 00 August 0000
Podosphaera oxyacanthae var. tridactyla (Wallr.) E.S. Salmon
Austria, Kremsmuenster (A), Lower Austria, Sonntagsberg, near Rosenau