• Bacidia caligans (Nyl.) A.L.Sm.
Bacidia caligans
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 rather small and insignificant Bacidia with a grey, green or fawn, soft, scurfy, granular-sorediate thallus and reddish-brown discs grows on sheltered calcareous rocks, mortar and on bark. A feature of this species is the rather discrete soralia. The outer edge of the exciple in squash is K+ purplish; there is no trace of blue-green pigment. The conidia are curved.

Key characteristics

  • Thallus grey, green or fawn, soft-granular, the soralia discrete
  • Exciple outer edge, K+ purple.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Bacidia caligans (Nyl.) A.L.Sm.. [In] LichenIreland. Accessed on 2018-07-22.