Erysiphe polygoni
DC.
KW [Darwin] 53375. Place of collection: Ukraine; Odesa Oblast; Kiliya District; Black Sea; Zmiyinii island (N45°15' E30°12'). Date of collection: 29 October 1997. Associated organism: Rumex acetosella subsp. acetoselloides (leaf, petiole). Collector: Heluta, V.P.. Identifier: Heluta, V.P..