• Opegrapha cesareensis Nyl.
Opegrapha cesareensis
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(Map updated: 11 August 2009)

The mosaic-forming crustose lichen, O. cesareensis can be found by searching the damp gullies and crevices of coastal siliceous rocks. In the field, it is the lilac sheen of the thin, bleached thallus that often draws the attention of the observer. The crooked, scribble-like discs (lirellae) are typically black, with 4-5-septate spores. Exposed coasts and headlands.

Key characteristics

  • Thin, lilac-grey thallus with scribble-like discs; 4-5-septate under the microscope
  • Damp gullies at the foot of siliceous cliff outcrops.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Opegrapha cesareensis Nyl.. [In] LichenIreland. Accessed on 2020-07-12.