| Name | Oidium quercinum Thümen |
| Authorship | Thümen |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Oidium |
| Contains | Oidium quercinum var. gemmiparum Ferraris |
| Citation | 1878 Jorn. Sci. Math. Phys. Nat. 1 Ser., 6(21-24): 233 |
| Holdings | 8 Specimens held in the Harvard University Herbaria identified as Oidium quercinum Thümen |
| Identification made in | [no date] (8) |
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