• Micarea lutulata (Nyl.) Coppins
Micarea lutulata
Click on map to open large map in new window
(Map updated: 11 August 2009)

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.


This is a species of shaded, siliceous rock outcrops and dry stone walls in well-wooded hilly country. It has a scurfy, grey-green thallus and small black convex discs sometimes united to form lumpy aggregations. The spores are simple. A reddish-brown hypothecium forms a distinctive layer in the disc below an olivaceous ‘upper disc’ layer or epithecium. In Ireland, the species is rare.

Key characteristics

  • Cracked or scurfy grey-green (sometimes almost black) thallus on shaded rocks below trees
  • Discs small (0.2–0.5mm diam.), black with an olivaceous layer above the red-brown base layer (microscope squash to see).

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Micarea lutulata (Nyl.) Coppins. [In] LichenIreland. Accessed on 2018-07-23.