• Buellia stellulata (Taylor) Mudd [3]
Buellia stellulata
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 rock-inhabiting, crustose lichen is virtually identical to B. aethelea (described elsewhere) but with a tiny, cracked thallus that is more or less white in colour. It is a coastal species that is usually associated with rocky places close to the sea. It is relatively common in suitable habitats in Ireland, but unlike Buellia aethelea tests K+ yellow not K+ yellow to red. Present in most coastal districts of Ireland.

Key characteristics

  • Very close to Buellia aethelea, and may also be confused with some small Rhizocarpon species. The almost-white thallus helps to suggest this species, being much paler than that of Buellia aethelea which is brown-grey (never white)
  • Both species are K+ yellow, but in the case of Buellia stellulata, the yellow colour change progresses through to red.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Buellia stellulata (Taylor) Mudd [3]. [In] LichenIreland. Accessed on 2017-10-17.