| Name | Erysiphe tomentosa G. H. Otth |
| Authorship | G. H. Otth |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | 1866 ["1865"] Mitth. Naturf. Ges. Bern. 580-602: 168 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Erysiphe tomentosa G. H. Otth |
| Identification made in | [no date] (1) |