• Collema cristatum var. marginale (Huds.) Degel.
Collema cristatum var. marginale
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Like C. cristatum (described elsewhere), which has an abundance of narrow, concave lobes and numerous discs but differs in its less incised lobes and predominance of wart-like projections in the centre (isidia). North and north-west Ireland.

Key characteristics

  • Sometimes with numerous globose isidia centrally
  • Less deeply-cut, unwrinkled lobes.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Collema cristatum var. marginale (Huds.) Degel.. [In] LichenIreland. Accessed on 2018-08-20.