| Name | Erysiphe cruciferarum Opiz ex L. Junell |
| Authorship | Opiz ex L. Junell |
| Rank | Species |
| Placed in | Erysiphe R. Hedwig ex de Candolle: Fries |
| Citation | Svensk Bot. Tidskr. 61(1): 217 |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Erysiphe cruciferarum Opiz ex L. Junell |
| Identification made in | [no date] (5), 1982 (1), 1984 (1), 1985 (1) |
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