Family: Acarosporaceae
Myriospora smaragdula (Wahlenb.)Nägeli ex Uloth
Type: Crustose
Widespread and quite variable in colour and form. Found on siliceous rock, sometimes base-rich. Thallus irregular, broken into areoles which contain up to seven apothecia
Determiner:
Paul Cannon
References:
Smith et al. editors (2009) The Lichens of Great Britain and Ireland
Dobson (2018) Lichens: an Illustrated Guide to the British and Irish Species