Erysiphe polygoni DC.

KW [Darwin] 45107. 采集地点: 乌克兰; Luhansk Oblast; Sverdlovsk District; Provallia village; Provalsky Steppe reserve (N48°08' E39°48'). 相关生物: Polygonum aviculare (叶片). 鉴定人: Heluta, V.P..