• Opegrapha viridis (Ach.) Nyl.
Opegrapha viridis
Click on map to open large map in new window
(Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.


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 2018-08-15.