A Brown Lichen on a local Kerb Stone

When we first saw this lichen growing on a local kerb stone a few months ago it was a dark greenish colour. We wondered if it might be Phaeophyscia orbicularis: although the lobes seemed too big. 

It has subsequently turned a brown colour and been identified as a Xanthoparmelia species, possibly X. verruculifera, being the most common of the Xanthoparmelia species.

            

We had previously ignored another brown lichen, assuming it was dried up. We shall be more careful in future.