Rhizocarpon concentricum Beltr.

Lich. bass. p. 187, excluso syn. Jacquini ad Rhizoc. petraeum pertinente.
Synonyms: Lichen concentricus Davies; Lecidea petraea Ach. (Meth. p. 36, exclusis synonymis Wulfeni et Hoffmanni); Rhizocarpon petraeum var. dealbatum Mass. (Ric. p. 103)
Localirty of collection: Ad rupes vulcanicas montis Glozo in ditione Bassanensi.
Catalogue ID: MSNVE-24987

All images have been taken by Dr. Maria Zardini. They are property of the Natural History Museum of Venbice, and are distributed under a CC BY licencse.