| Name | Tubercularia vulgaris f. betulae (Wallroth) P. Karsten |
| Authorship | (Wallroth) P. Karsten |
| Rank | Forma |
| Placed in | Tubercularia vulgaris Tode |
| Citation | 1861 Fungi Fenniae Exsicc. 1: 14 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Tubercularia vulgaris f. betulae (Wallroth) P. Karsten |
| Identification made in | [no date] (1) |