LichenIreland
  • Collema undulatum Laurer ex Flot.
Collema undulatum
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. undulatum is a rare ‘jelly’ lichen of exposed limestone rocks. In general appearance it resembles C. cristatum (large, dark thallus and channelled lobes with wavy margins). Discs are numerous often crowded with exciple, level with, or lower than, that of the disc. The spores are three-septate and fusiform-ellipsoid. Forms with globose or granular isidia belong to the var. granulosum. In Ireland, it is only known from the Burren, though there are earlier records from stone walls in Connemara, County Galway.

Key characteristics

  • Like C. cristatum (described elsewhere) but with three-septate spores, concave lobes and exciple never above the level of the disc
  • On the hard limestones of exposed ridges.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Collema undulatum Laurer ex Flot.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18457 Accessed on 2017-11-18.