LichenIreland
  • Fuscidea austera (Nyl.) P.James
Fuscidea austera
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This species is only likely to be met with among the crooked outcrops and block scree of the Irish upland areas. It grows best on gritty, siliceous rocks where it is mosaic-forming. The thallus is predominantly chocolate brown, the surface cracked into areoles (‘islands’). The most distinctive feature is the thick, purple or red-brown, wavy-edged discs which lie conspicuously on the surface of the thallus. In Ireland, the species is only recorded from County Donegal.

Key characteristics

  • An upland lichen found on the sheltered sides of vertical gritstones; thallus brown spotted with purple-hued discs with thick wavy margins
  • All spot tests and reactions are negative.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Fuscidea austera (Nyl.) P.James. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18485 Accessed on 2017-11-24.