| Name | Uredo fulva f. sonchorum (Rabenhorst) P. Karsten |
| Authorship | (Rabenhorst) P. Karsten |
| Rank | Forma |
| Placed in | Uredo fulva Schumacher |
| Citation | 1861 Fungi Fenniae Exsicc. 1: 83 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Uredo fulva f. sonchorum (Rabenhorst) P. Karsten |
| Identification made in | [no date] (1) |