Erysiphe polygoni DC.

KW [Darwin] 12257. Place of collection: Ukraine; Republic of Crimea; Feodosiya District; Karadah reserve; Karahach mountain ridge (top, north side) (N44°55' E35°13'). Date of collection: 30 August 1982. Associated organism: Polygonum patulum (leaf). Collector: Heluta, V.P.. Identifier: Heluta, V.P..