• Collema undulatum var. granulosum Degel.
Collema undulatum var. granulosum
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This variety differs from var. undulatum (described elsewhere) in its globose or granular isidia. Records have originated from the Burren, County Clare and the Arran Islands.

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 var. granulosum Degel.. [In] LichenIreland. Accessed on 2018-08-16.