| Name | Stereocaulon vesuvianum f. umbonatum (Wallroth) I. M. Lamb |
| Authorship | (Wallroth) I. M. Lamb |
| Rank | Forma |
| Placed in | Stereocaulon vesuvianum Persoon |
| GUID | urn:lsid:indexfungorum.org:names:354347 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Stereocaulon vesuvianum f. umbonatum (Wallroth) I. M. Lamb |
| Identification made in | [no date] (1) |