foliose and greener than it looks here
Caution: Do NOT use iSpot to identify fungi to eat!
Some fungi are very poisonous so a mistaken ID could have serious consequences.
No interactions present.
I agree with Synangium that C. foliacea is a likely identity.
I have a far from comprehensive knowledge of Greek Cladonia, but it is not C. convoluta, which I think would have been the most likely Mediterranean look-alike.
Lat/Lng: 38.65, 20.768