The thallus is grey, thick and warty and may have a yellowish tinge. The cup-shaped black apothecia grow up to 3mm and look like mini volcano craters.
Usually on siliceous rocks.
All year round.
Widespread and fairly frequent in Britain.
Status in Leicestershire and Rutland not known.
Leicestershire & Rutland Map
Enter a town or village to see local records
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015