| Name | Erysiphe communis f. rumicis Fuckel | 
| Authorship | Fuckel | 
| Rank | Forma | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Erysiphe communis (Wallroth) Schlechtendal: Fries | 
| Citation | 1863 Fasc VII: no. 681 | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Erysiphe communis f. rumicis Fuckel | 
| Identification made in | [no date] (2) | 
