LichenIreland
  • Xanthoria polycarpa (Hoffm.) Th.Fr. ex Rieber
Click on the image to enlarge it in a new window
Xanthoria polycarpa
© Mike Simms
Xanthoria polycarpa
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 small (to 2cm diam.), rosette-forming, orange, foliose lichen is easily told by the abundant orange discs with yellow margins. It grows on enriched tree bark and in the angles of twigs and is very common often near areas of intensive farming.

Key characteristics

  • Its size, colour, rosette form and requirement for enriched or high pH bark, for example, elder, will help identify this species
  • It can be separated from Candelaria concolor by its K (Potassium hydroxide) + purple reaction and from fertile Xanthoria candelaria by the absence of powdery fragmentation (soredia).

Original text submitted by Simon Davey