• Collema crispum (Huds.) F.H.Wigg.
Collema crispum
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(Map updated: 11 August 2009)

This greenish-brown to black ‘jelly lichen’ is most frequently seen on damp, artificial calcareous substrates such as wall tops and mortar. When wet, it becomes swollen. The thallus is covered in rounded, overlapping lobes that are densely clustered. It is common in suitable localities throughout Ireland.

Key characteristics

  • It has many overlapping lobes that are covered with more or less semicircular flattened lobes or isidia
  • Discs are uncommon.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Collema crispum (Huds.) F.H.Wigg.. [In] LichenIreland. Accessed on 2018-12-18.