• Rinodina bischoffii (Hepp) A.Massal.
Rinodina bischoffii
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(Map updated: 11 August 2009)

This is one of only a few lichen species that appear to thrive on small pebbly rock fragments lying on the disintegrating tops of limestone outcrops and cliffs. The grey, scurfy thallus has no lichen substances but the prominent brown to black discs, which become convex through exclusion of the rim, make them instantly identifiable. The hymenium of the disc contains tiny oil droplets; spores broad with a thick, pigmented band dominating the centre. In Ireland, the species is very rare.

Key characteristics

  • Thallus grey, scurfy; discs common, sitting on the surface, rim becoming excluded with age
  • Hymenium with oil droplets; spores barrel-shaped with thick, dark banded septum.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Rinodina bischoffii (Hepp) A.Massal.. [In] LichenIreland. Accessed on 2020-05-26.