Lichen on church

Lichen on church

Observation - Lichen on church - UK and Ireland. Description: Crustose lichen with pale thallus growing on basic stones and mortar on north wall of church. Black lirellae sometimes massed together in bosses. Possibly Opegrapha calcarea.

Crustose lichen with pale thallus growing on basic stones and mortar on north wall of church. Black lirellae sometimes massed together in bosses. Possibly Opegrapha calcarea.