• Rinodina luridescens (Anzi) Arnold
Rinodina luridescens
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This is a distinctive and sizeable crust of siliceous, maritime rocks with a thick, irregularly cracked, dark-grey to violet-black thallus. The black discs are large (0.8-1.5mm diam.), flat and immersed. The thallus is C+ orange-red which separates it from similar species. Widely but thinly distributed in Ireland, coastal.

Key characteristics

  • Grows with other crustose lichens in grey zone (directly above the orange zone) of maritime rocks; has a thick dark-grey to violet-black thallus, the mauve tinge predominating
  • Large immersed discs without a raised edge, thallus C+ orange-red.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Rinodina luridescens (Anzi) Arnold. [In] LichenIreland. Accessed on 2018-08-16.