Lichen overgrowing lichen

Lichen overgrowing lichen

Observation - Lichen overgrowing lichen - UK and Ireland. Description: Green-brown squamules with black lecideine apothecia overgrowing black lichen on a limestone outcrop. Possibly Toninia verrucarioides. (Black lichen is possibly Placynthium nigrum with blue colour of prothallus visible just above shadow on right side of

Green-brown squamules with black lecideine apothecia overgrowing black lichen on a limestone outcrop. Possibly Toninia verrucarioides. (Black lichen is possibly Placynthium nigrum with blue colour of prothallus visible just above shadow on right side of image. Also possibly Dermatocarpon miniatum visible top left of image.)