LichenIreland
  • Usnea cornuta Körb.
Click on the thumbnails to enlarge the images
Usnea cornuta
© Robert Thompson
Usnea cornuta
© Robert Thompson
Usnea cornuta
© Robert Thompson
Usnea cornuta
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.

 

Well distributed throughout Ireland, this beard lichen is shiny grey to pale olive green (sometimes bluish) in colour and unlike U. subfloridana, is not blackened at the base where it attaches to the bark. The main stems appear turgid and swollen, yet are markedly constricted at the point of attachment to the side branches. The small branches are covered in minute white spots which can develop into isidia or soredia. It should be searched for in boggy areas on tree trunks and branches or in woodland by rivers and streams.

Key characteristics

  • Base not blackened where attached to the bark; branches slightly inflated
  • Side branches markedly ‘pinched’ where they join the main stems.

Original text submitted by Vince J. Giavarini