LichenIreland
  • Verrucaria caerulea DC.
Click on the image to enlarge it in a new window
Verrucaria caerulea
© Mike Simms
Verrucaria caerulea
Click on map to open large map in new window
(Map updated: 11 August 2009)
 

This is a crustose species characteristic of hard limestones, often in shady situations. It is easily told from other species by its finely cracked, blue-grey to silver-grey colour. The spherical discs (perithecia) are abundant and over three-quarters immersed in the thallus. It is common in areas with suitable habitat, especially on the limestones of western Ireland.

Key characteristics

  • The thick, finely cracked, silver-grey thallus, abundant discs and the habitat strongly suggest this species
  • The discs that are tiny flasks embedded in the thallus have a conspicuous concave depression at the top, which can be seen with a hand lens.

Original text submitted by Simon Davey

 
 Simms, M. J., (2016). Verrucaria caerulea DC.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=20671 Accessed on 2018-10-20.