| Name | Erysiphe occidentalis M. Bradshaw, U. Braun & Quijada |
| Authorship | M. Bradshaw, U. Braun & Quijada |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | 2025 Forest Pathol. 55: e70005, 16 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Erysiphe occidentalis M. Bradshaw, U. Braun & Quijada |
| Identification made in | [no date] (1), 2025 (3) |