• Staurothele succedens (Rehm ex Arnold) Arnold
Staurothele succedens
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The blackish thallus of this lichen is microscopically scaly and mixed with a thin smear of cyanobacteria. Though the tall discs (perithecia) are slightly immersed they form prominent structures with cylindrical algal cells and eight-spored asci. In Ireland, it grows on limestone near to where a stream emerges. It is tolerant of damp situations by watercourses, but generally avoids the most acid stream beds.

Key characteristics

  • Blackish, roughened thallus; grows in the amphibious zone of rivers and streams
  • Prominent perithecia containing eight-spored asci and cylindrical algae.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Staurothele succedens (Rehm ex Arnold) Arnold. [In] LichenIreland. Accessed on 2018-08-17.