Erysiphe polygoni
DC.
KW [Darwin] 12309. Place of collection: Ukraine; Donetsk Oblast; Novoazovsk District; Khomutovskyi Steppe reserve; Hruz’kiĭ Yelanchik river (side) (N47°17' E38°10'). Date of collection: 23 September 1954. Associated organism: Rumex confertus (leaf). Collector: Morochkovsky, S.F.. Identifier: Heluta, V.P..