LichenIreland
  • Biatora britannica
Biatora britannica
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.

 

Formerly recorded as B. efflorescens (a taxon which is now known to have a more eastern distribution in Britain and Ireland) the thallus of this species has pale green or yellowish soralia which react Pd+ orange-red. The species is frequently sterile. When fertile it can be separated from B. efflorescens by the blue-grey colouration of the discs which, when squashed under a microscope slide, are seen to contain a blue-green pigment. There is one collection from County Fermanagh where material was gathered from a willow. The habitat of both B. britannica and B. efflorescens is identical: mossy tree bark of deciduous trees in old woodland.

Key characteristics

  • Pale green or yellowish soralia on mossy tree bark, testing Pd+ orange-red; discs when present, blue-grey (not beige to red-brown = B. efflorescens)
  • Disc in squash contains a blue-green pigment.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Biatora britannica . [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=433082 Accessed on 2017-10-23.