| Name | Oidium irregulare Peck |
| Authorship | Peck |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Oidium |
| Citation | 1881 Mycoth. Univ. Cent. XIX: no. 1874 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Oidium irregulare Peck |
| Identification made in | [no date] (1) |
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