Order: Verrucariales Family: Verrucariaceae
Species: Verrucaria macrostoma forma furfuracea de Lesd
Photos: Church wall. Macroom, Co. Cork, SW Ireland.
Identification needs confirming
The thallus is pale to dark brown, areolate or almost squamulose. Very similar to Verrucaria macrostoma but with soredia and blastidia (vegetative propogules) developing on the edges of the areoles. Pycnidia are visible on the surface of the areoles.
Occurs throughout Ireland on calcareous rocks, limestone and on mortar. Chemical reactions negative.
Verrucaria macrostoma forma furfuracea de Lesd. On north-facing church wall. August 2009