| Name | Erysiphe parnassiae (Halsted) Jaczewski |
| Authorship | (Halsted) Jaczewski |
| Rank | Species |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | 1927 Karm. Opred. Grib. Vyp. 2. Muchn.-Ros. Griby 165 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Erysiphe parnassiae (Halsted) Jaczewski |
| Identification made in | 1983 (2) |
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