| Name | Peronospora gangliformis f. cirsii-arvensis P. Karsten |
| Authorship | P. Karsten |
| Rank | Forma |
| NomenclaturalStatus | NomInvalid |
| Placed in | Peronospora gangliformis (Berkeley) Tulasne |
| Citation | 1866 Fungi Fenniae Exsicc. 6: 584 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Peronospora gangliformis f. cirsii-arvensis P. Karsten |
| Identification made in | [no date] (2) |
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