Lichen on coastal granite

Lichen on coastal granite

Observation - Lichen on coastal granite - UK and Ireland. Description: No thallus observed. Black clusters, looking a bit like dried currants, of lecideine apothecia growing on a granite wall exposed to the sea. Possibly Polysporina simplex.

No thallus observed. Black clusters, looking a bit like dried currants, of lecideine apothecia growing on a granite wall exposed to the sea. Possibly Polysporina simplex.