• Collema furfuraceum (Arnold) Du Rietz
Click on the thumbnails to enlarge the images
Collema furfuraceum
© Mike Simms
Collema furfuraceum
© Mike Simms
Collema furfuraceum
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.


Nicknamed ‘bats’ wings’ by lichenologists it’s easy to see why. This epiphytic ‘jelly lichen’ has blackish lobes with radiating ridges (like a skin membrane stretched across bone) studded with tiny projections (isidia). Discs are rare. Best looked for on old wayside trees near country gardens and hotels, estates, golf courses, etc., where they favour the well-lit bark of tree trunks — rarely the upper branches. Throughout Ireland.

Key characteristics

  • Thallus black like bats’ wings with longitudinal ridges covered in isidia
  • Discs very rare; on big wayside trees, for example, sycamore, ash, horse-chestnut.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Collema furfuraceum (Arnold) Du Rietz. [In] LichenIreland. Accessed on 2018-08-16.