Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.
A distinctive crustose lichen with a thick, pale grey, warted thallus. Conspicuous large black apothecia with pale margins are abundant. This is a common species of the 'Grey Zone' but also is found on siliceous rocks inland. Superficially similar to Lecidella subincongrua, but that species has a pale ochre thallus and the convex apothecia have black margins.
Original text submitted by Michael Simms