LichenIreland
  • Collema fragrans (Sm.) Ach.
Collema fragrans
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.

 

The ‘jelly lichen’ Collema fragrans is a rare species of rain or wound tracks on nutrient-enriched bark. The tiny (0-0.5cm diam.), deeply-lobed thallus — some with spiny outgrowths — forms tidy, cushion-like rosettes. When discs are present, these are often abundant and crowded. The asci (spore sacs) are (four- ) to eight-spored; spores submuriform. Owing to the demise of elm, its populations have crashed dramatically in Britain. In Ireland, there is only one nineteenth-century record which comes from near Bantry, County Cork. Though presumed extinct in Ireland, it is not beyond the bounds of possibility that relict populations still occur in the south-west.

Key characteristics

  • Thallus tiny, forming button-like, olive-black cushions on nutrient-rich bark
  • Favours wound tracks on trees such as elm, basic-barked oak and beech.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Collema fragrans (Sm.) Ach.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18441 Accessed on 2017-12-12.