This lichen was collected from the Glendalough mica-schist in 2009. It grows under overhanging rock. The white-grey areolate thallus supports small black, Lecidea-like discs with narrowly ellipsoid simple spores (8–11 x 3–5µm). The discs contain several green-blue pigments and chemical substances including at Glendalough one that gives a C+ red reaction.

Key characteristics

• Thallus white, cracked into ‘islands’, discs black and grouped
• Discs with green pigments and chemical substances; overhanging mica-schist.

NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database

iNaturalist: Species account : iNaturalist World Species Observations database

Original text submitted by Vince J. Giavarini