| Name | Peronospora illinoensis Farlow |
| Authorship | Farlow |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Peronospora |
| GUID | urn:lsid:indexfungorum.org:names:184113 |
| Citation | 1883 Bot. Gaz. 8: 332 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Peronospora illinoensis Farlow |
| Identification made in | [no date] (3), 1983 (3) |