| Name | Erysiphe flexuosa (Peck) U. Braun & S. Takamatsu |
| Authorship | (Peck) U. Braun & S. Takamatsu |
| Rank | Species |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | 2000 Schlechtendalia 4: 19 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Erysiphe flexuosa (Peck) U. Braun & S. Takamatsu |
| Identification made in | [no date] (1), 2024 (4) |