LichenIreland
  • Buellia griseovirens (Turner & Borrer ex Sm.) Almb.
Click on the thumbnails to enlarge the images
Buellia griseovirens
© Mike Simms
Buellia griseovirens
© Mike Simms
Buellia griseovirens
Click on map to open large map in new window
(Map updated: 11 August 2009)
 

This crustose species is mostly characteristic of old wooden fencing and twigs and branches of acid-barked trees. The thallus is usually sterile (without discs), grey, and is covered with ulcer-like dark green to blue-green soralia. Owing to the nature of the climate, the interior of Ireland has its field boundaries rarely fashioned from wood so weather-worn worked timber is in short supply. Picnic tables are today one of the best alternative habitats for it. B. griseovirens turns K+yellow to red. It is a much overlooked species.

Key characteristics

  • The grey, sterile thallus and scattered blue-green soredia reacting K+yellow to red should confirm it
  • It is most likely to be confused with Trapeliopsis flexuosa which is C+ red.

Original text submitted by Simon Davey

 
 Simms, M. J., (2016). Buellia griseovirens (Turner & Borrer ex Sm.) Almb.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18275 Accessed on 2018-10-19.