• Leptogium gelatinosum (With.) J.R.Laundon
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Leptogium gelatinosum
© Mike Simms
Leptogium gelatinosum
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(Map updated: 11 August 2009)

The tops of mossy, limestone walls and rocks all over Ireland will support this foliose, non-isidiate species. The much divided, green-brown, paper-thin thallus is frequently found among moss. The wrinkled lobes and abundant reddish-brown discs are important characters. The specific epithet ‘gelatinosum’ alludes to its condition when wet when the thallus softens to form an almost translucent and delicate tracery. While the lobe ends are much divided, they do not draw out at the ends into cylindrical fibrils.

Key characteristics

  • Paper-thin, much divided, green-brown thallus on mossy limestone surfaces
  • Lobe ends divided and flattened (but not richly so) and never forming cylindrical extensions.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Leptogium gelatinosum (With.) J.R.Laundon. [In] LichenIreland. Accessed on 2019-06-25.