| Name | Erysiphe ulmariae Persoon ex Desmazières |
| Authorship | Persoon ex Desmazières |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | 1846 Ann. Sci. Nat., Bot. sér. 3 6: 66 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Erysiphe ulmariae Persoon ex Desmazières |
| Identification made in | [no date] (3), 1984 (1), 1985 (1), 1987 (1) |
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