Erysiphe polygoni
DC.
KW [Darwin] 11565. Place of collection: Ukraine; Rivne Oblast; Dubrovytsia District; Dubrovytsia town (N51°34' E26°34'). Date of collection: 3 September 1959. Associated organism: Polygonum aviculare (leaf). Collector: Smits’ka, M.F.. Identifier: Heluta, V.P..