Lichen with pink-brown apothecia

Lichen with pink-brown apothecia

Observation - Lichen with pink-brown apothecia - UK and Ireland. Description: Thin white thallus growing on mortar of siliceous sandstone church wall. Pink-brown apothecia. Some almost spherical. A few smaller apothecia seem to be still partially embedded in the thallus e.g. one about half way across and a third of the way up image

Thin white thallus growing on mortar of siliceous sandstone church wall. Pink-brown apothecia. Some almost spherical. A few smaller apothecia seem to be still partially embedded in the thallus e.g. one about half way across and a third of the way up image iii. Possibly Trapelia coarctata.