| Name | Erysiphe sp. |
| Authorship | |
| Rank | Species |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Holdings | 125 Specimens held in the Harvard University Herbaria identified as Erysiphe sp. |
| Identification made in | [no date] (113), 1983 (1), 1984 (1), 2022 (1), 2024 (6), 2025 (3) |
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