• Gyalidea hyalinescens (Nyl.) Vězda
Gyalidea hyalinescens
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A crustose species with a thin grey thallus bearing small, flat to concave, orange discs, this lichen is known from the west of Ireland where it grows on soft, siliceous rocks (including boulders) in damp ravines. When near streams, it can resemble some forms of Ionaspis lacustris but has a stouter disc rim and septate spores. In Ireland: Counties Kerry, Cork, Galway, Mayo and Donegal.

Key characteristics

  • Thallus grey with orange discs; spores are septate; in crevices and ravines
  • On soft, weathered rocks and boulders, especially basalt.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Gyalidea hyalinescens (Nyl.) Vězda. [In] LichenIreland. Accessed on 2018-07-19.