• Collema subflaccidum Degel.
Click on the image to enlarge it in a new window
Collema subflaccidum
© Mike Simms
Collema subflaccidum
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.


C. subflaccidum is somewhat similar in appearance to C. flaccidum (described elsewhere) but there the similarity ends as the latter is predominantly a lichen of aquatic habitats. C. subflaccidum is an epiphyte of mature basic-barked trees often confined to rather sheltered situations. The near black thallus is covered with tiny pebble-like isidia giving the upper side a scurfy appearance. Sheltered, well stocked country gardens with mature ash trees would be promising search areas. Western Ireland.

Key characteristics

  • Near-black ‘jelly-lichen’ with flat lobes covered in pebble-shaped isidia
  • On mature, basic-barked trees in damp, relatively sheltered habitats.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Collema subflaccidum Degel.. [In] LichenIreland. Accessed on 2018-07-23.