| Name | Rhizocarpon geographicum f. pulverulentum (Schaerer) Rabenhorst |
| Authorship | (Schaerer) Rabenhorst |
| Rank | Forma |
| Placed in | Rhizocarpon geographicum (Linnaeus) de Candolle |
| GUID | urn:lsid:indexfungorum.org:names:196309 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Rhizocarpon geographicum f. pulverulentum (Schaerer) Rabenhorst |
| Identification made in | [no date] (1) |
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