• Fuscidea lygaea (Ach.) V.Wirth & Vězda
Fuscidea lygaea
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(Map updated: 11 August 2009)

This brown, purple-tinted, crustose lichen with scattered, black discs (to 0.6mm) is an acid rock specialist often dominating rock surfaces in upland areas together with F. cyathoides (described elsewhere) and the ‘map lichen’ Rhizocarpon geographicum. Chemical reactions are negative. Northern and western Ireland.

Key characteristics

  • Thallus brownish-purple with scattered, black, almost margin-free discs
  • An upland species of hard, acid rocks.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Fuscidea lygaea (Ach.) V.Wirth & Vězda. [In] LichenIreland. Accessed on 2019-01-19.