Placodium crassum Flotow, forma (caespitosum).

Synonyms: Psoroma crassa var. caespitosa Massal. (Ric. p. 49)
Localirty of collection: Ad terram et saxa circa Caltrano in prov. Vicetina.
Catalogue ID: MSNVE-25054

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.