• Porocyphus coccodes (Flot.) Körb.
Porocyphus coccodes
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(Map updated: 11 August 2009)

This crustose lichen has cyanobacteria (blue-green algae) fastened into its structure which makes it gelatinous when wet, thus capable of surviving in aquatic or semi-aquatic environments. Look for the black, approx. 2cm-diam. thallus, on boulders, around the edges of loughs during the middle of the year, when the discs with a pore-like opening, shrivel to resemble the pimpled surface of a table-tennis bat. It is very rare in Ireland.

Key characteristics

  • Cannot be confused with other Porocyphus species; thallus crustose, brown to black, mostly smooth
  • Discs in tight, erect pimple-like clusters, black with pore-like opening at the tip, through which the paler contents may be glimpsed.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Porocyphus coccodes (Flot.) Körb.. [In] LichenIreland. Accessed on 2019-08-25.