Dark brown lichen on limestone

Dark brown lichen on limestone

Observation - Dark brown lichen on limestone - UK and Ireland. Description: Dark brown thallus growing on limestone ledge on church wall. Lobes curved and rising with spherical isidia on both surfaces. Possibly Collema auriforme.

Dark brown thallus growing on limestone ledge on church wall. Lobes curved and rising with spherical isidia on both surfaces. Possibly Collema auriforme.