• Opegrapha viridis (Ach.) Nyl.
Opegrapha viridis
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(Map updated: 11 August 2009)

This ‘scripture lichen’ is mainly restricted to the Kerry woodlands of the south-west. The thallus is thin, dull olive or brown and forms small, scattered patches on the bark of hazel, holly, oak and willow. Discs are short, rounded and scattered (often button-like), each with a narrow slit. Spores are 11- to 15-septate. South-west Ireland.

Key characteristics

  • Thallus in small patches, dull olive-green; discs, short (< 1mm long), knot-like
  • Spores 25-60ųm long; 11- to15-septate.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Opegrapha viridis (Ach.) Nyl.. [In] LichenIreland. Accessed on 2019-01-19.