LichenIreland
  • Porina guentheri var. lucens (Taylor) Swinscow
Porina guentheri var. lucens
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This lichen with spherical discs (perithecia) grows on damp siliceous rocks by loughs and upland rivers like the related P. guentheri var. guentheri (described elsewhere). Microscopic examination of the spores is required for certain identification. It differs in several respects from var. guentheri (i) spores are six-eight-septate, (ii) spores have from one-three longitudinal septa, and (iii) the spores are slightly broader. Western Ireland.

Key characteristics

  • Thallus often with violaceous or purple tinge; clustered perithecia up to half immersed and large spores (six-nine-septate)
  • On damp, granitic rocks: stream gorges, outcrops by lough edges; differs from the var. lucens in spores lacking longitudinal divisions.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Porina guentheri var. lucens (Taylor) Swinscow. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=19890 Accessed on 2017-10-23.