• Cliostomum tenerum (Nyl.) Coppins & S.Ekman
Cliostomum tenerum
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This light-shy maritime lichen inhabits the dry, shady crevices of the ‘grey lichen zone’ of siliceous rocks on coasts around Ireland. The tiny, scattered, creamy-grey, minutely warted thallus has mostly pinkish-brown discs (0.1-0.2mm diam.) with a thin, unevenly wavy margin. Reactions: K+ yellow, Pd + red. Throughout Ireland.

Key characteristics

  • Small, cream-grey, minutely warted thallus with pinkish-brown discs
  • Only on sheltered rock surfaces of sea cliffs within the ‘grey lichen’ zone; coasts with siliceous rocks only.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Cliostomum tenerum (Nyl.) Coppins & S.Ekman. [In] LichenIreland. Accessed on 2018-07-16.