Rinodina sophodes Obscure Black-shielded Lichen

Rinodina sophodes is scattered throughout Britain, especially in the west, but it is not common in south Wales. It prefers smooth barked trees like Ash (Fraxinus excelsior) and often occurs high up on the tree. The olive coloured thallus usually bears distinctive apothecia with dark brown or black discs which have paler margins. 

Listed by Alan Orange in Flora of Glamorgan (Wade et al, 1994).