• Rinodina isidioides (Borrer) H.Olivier
Rinodina isidioides
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(Map updated: 11 August 2009)

The exotic-looking, crustose to scaly thalli of grey, clustered isidia (thallus pegs) which are much branched like a marine coral, bears numerous scattered discs also fringed with isidia. The thallus is K+ yellow. It is rare in Ireland and present only in Counties Kerry and Cork. It grows best on the mossy or Frullania-rich bark of old oak trees that are warmed by the sun.

Key characteristics

  • Thallus grey, of peg-like isidia much branched like an underwater coral
  • Often with discs isidiate at the fringes; sunny, bryophyte-rich trees in the old oak woodlands of the south-west.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Rinodina isidioides (Borrer) H.Olivier. [In] LichenIreland. Accessed on 2019-01-23.