| Name | Erysiphe depressa var. carduorum Desmazières |
| Authorship | Desmazières |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Erysiphe depressa (Wallroth) Link |
| Citation | 1846 Pl. Crypt. N. France Fasc. 31: no. 1516 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Erysiphe depressa var. carduorum Desmazières |
| Identification made in | [no date] (3) |