Erysiphe polygoni DC.

KW [Darwin] 53652. Place of collection: Ukraine; Ternopil Oblast; Husiatyn District; Medobori Nature Reserve; Viknyans’ke forestry, road along the field to Skeli Franka parcel (N49°20' E26°09'). Date of collection: 8 September 1994. Associated organism: Rumex confertus (leaf). Collector: Dudka, I.O.. Identifier: Kolomīyets’, Ī.V..