• Micarea melaena (Nyl.) Hedl.
Micarea melaena
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 species forms a granular thallus which, to the naked eye, appears little more than a coarse, black charcoal stain on soil or wood. Black, globose discs are usually abundant with a dark, purple-brown hypothecium (bottom layer of the disc) under the microscope. Spores: three-septate. C+ red or C-: all other reactions are negative. Wooden tree stumps, decaying timber, acid bark and peat. Northern Ireland, rare elsewhere.

Key characteristics

  • Black, stain-like, granular thallus with abundant spherical discs
  • On decaying acid bark; disc with colourful purple-brown hypothecium in squash; occasionally C+ red.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Micarea melaena (Nyl.) Hedl.. [In] LichenIreland. Accessed on 2018-08-18.