Erysiphe polygoni
DC.
KW [Darwin] 11578. Place of collection: Ukraine; Kherson Oblast; Chaplynka District; Askania Nova reserve (N46°28' E34°00'). Date of collection: 18 August 1972. Associated organism: Polygonum aviculare (leaf). Collector: Dudka, I.O.. Identifier: Heluta, V.P..