Variable. Large perithecia are half to fully immersed in +/- areolate pale brown thallus. Thallus can also be whitish, grey or green-grey, sometimes +/- immersed and appearing as brown flecks on substrate.

Found in man-made and natural habitats on calcareous rocks, limestone, mudstone, mortar and bricks.

All year round.

Widespread and quite frequent in Britain.

Fairly frequent in Leicestershire and Rutland.