• Lecidea lithophila (Ach.) Ach.
Lecidea lithophila
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(Map updated: 11 August 2009)

This is a common, crustose, siliceous rock species regularly present in upland areas, especially near streams. It has compact, black apothecia (so flat they look ironed) and a smooth, cracked areolate, occasionally reddened thallus. A useful character is the brown colour of the discs when moist. It is generally scattered in Ireland, mainly in upland areas.

Key characteristics

  • The key features are the abundant flat, black discs, smooth surface to the thallus and ‘ironed’ appearance. The black discs turn brown when moistened
  • Loose rocks and boulders between the amphibious and terrestrial zones of upland acid streams usually provide plentiful material.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Lecidea lithophila (Ach.) Ach.. [In] LichenIreland. Accessed on 2019-07-16.