Caloplaca teicholyta. Seen here in the more usual, non-fertile state in which it occurs on artificial habitats. It is very common, and best learnt by familiarisation with its jizz. This photograph taken on a wall in the grounds of Elizabeth Castle, Jersey.
Species category:
Photo:
![](https://psl.brc.ac.uk/sites/default/files/upload/Caloplaca%20teicholyta%202.jpg)