| Name | Phragmidium incrassatum f. rosarum (Wallroth) P. Karsten |
| Authorship | (Wallroth) P. Karsten |
| Rank | Forma |
| Placed in | Phragmidium incrassatum Link |
| Citation | 1861 Fungi Fenniae Exsicc. 1: 4 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Phragmidium incrassatum f. rosarum (Wallroth) P. Karsten |
| Identification made in | [no date] (1) |