| Name | Erysiphe horridula (Wallroth) Rabenhorst |
| Authorship | (Wallroth) Rabenhorst |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Contains | Erysiphe horridula f. symphyti-officinalis Saccardo |
| Citation | 1844 Deutschl. Krypt.-Fl. 1: 235 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Erysiphe horridula (Wallroth) Rabenhorst |
| Identification made in | [no date] (3) |
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