• Porina curnowii A.L.Sm.
Porina curnowii
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This species is restricted to south-west Ireland where it grows in seepage tracks on sheltered siliceous rock near the coast. The cracked thallus is grey-brown and the spherical discs (perithecia) are black. Spores are persistently seven-septate, 3752m long, but only 35m wide. It is this last feature which truly distinguishes it from P. guentheri var. guentheri which has wider spores as well as a greater variation in spore septa.

Key characteristics

  • Grey-brown cracked thallus with black perithecia; spores seven-septate, narrow
  • Seepage cracks in hard siliceous rocks; near the coast.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Porina curnowii A.L.Sm.. [In] LichenIreland. Accessed on 2018-08-17.