• Arthrorhaphis grisea Th.Fr.
Arthrorhaphis grisea
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.


Parasitic on the soil-dwelling lichen Baeomyces rufus, A. grisea is easily identified by its dark grey-green colour which gives the host a sickly appearance. It is not uncommon to find it with pimple-like pycnidia only. It occurs wherever the host is found, such as on exposed soil over siliceous rocks, most commonly in hilly areas. In Ireland: Brandon Mountains, County Kerry and Comeragh Mountains, Waterford.

Key characteristics

  • On Baeomyces rufus it stands out as a grey-green discolouration of the thallus
  • Discs to 0.5mm diam. with thick margin; pycnidia black.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Arthrorhaphis grisea Th.Fr.. [In] LichenIreland. Accessed on 2018-07-22.