Family: Lecanoraceae
Lecanora chlarotera Nyl.
Type: Crustose
Common on smooth, nutrient-rich barked trees. The commonest of a complex of similar species that require chemical tests and microscopic examination for certain identification
References:
Smith, C.W. et al. editors (2009) The Lichens of Great Britain and Irelandd
Dobson, F.S. (2018) Lichens: an Illustrated Guide to the British and Irish Species