• Lecidoma demissum (Rutstr.) Gotth.Schneid. & Hertel
Lecidoma demissum
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(Map updated: 11 August 2009)

Extinct in Ireland since 1884 (County Down), this lichen is best known by its resemblance to small soily ‘cow pats’. It grows on acid, peaty gravel soils on mountain tracks and ridges and is easily missed. Discs are common, convex and red-brown to brown. They grow up to 1mm diam. It once grew in the Wicklow Mountains and should be searched for there again.

Key characteristics

  • Thallus brown to brown-grey scattered with clusters of red-brown discs — resembling a small ‘cow pat’
  • On gravelly, acid mountain soils (usually above 500m).

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Lecidoma demissum (Rutstr.) Gotth.Schneid. & Hertel. [In] LichenIreland. Accessed on 2019-07-17.