Erysiphe polygoni
DC.
KW [Darwin] 11583. Place of collection: Ukraine; Cherkasy Oblast; Smila District; Smīla town (N49°14' E31°52'). Date of collection: 8 August 1939. Associated organism: Polygonum aviculare (leaf). Collector: Morochkovsky, S.F.. Identifier: Heluta, V.P..