Podosphaera tridactyla (Wallr.) de Bary

KW [Darwin] 11801. Place of collection: Russia; Leningrad Oblast; Sankt Peterburg Raion; Petrodvorets (N59°53' E29°54'). Date of collection: 29 July 1927. Associated organism: Prunus avium (leaf). Collector: Anon. [students].