| Name | Rhizocarpon lavatum (Fries) Hazslin |
| Authorship | (Fries) Hazslin |
| Rank | Species |
| Placed in | Rhizocarpon Ramond ex de Candolle |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Rhizocarpon lavatum (Fries) Hazslin |
| Identification made in | [no date] (3) |