USDA United States National Fungus Collections
Catalog #: BPI 994878
s.n.
Erysiphe tridactyla (Wallr.) Rabenh.

USDA United States National Fungus Collections
Catalog #: BPI 995408
s.n.
Erysiphe tridactyla (Wallr.) Rabenh.

USDA United States National Fungus Collections
Catalog #: BPI 603518
Fiedler s.n.
Podosphaera oxyacanthae var. tridactyla (Wallr.) E.S. Salmon
Germany, Schwerin