Known in Ireland only from one site in County Clare, this is a grey, crustose lichen of basic mica-schists or similar rocks with short thick, fan-shaped lobes and black discs. The Pd+ faint orange reaction of the thallus is significant. It is an unmistakable species of mountain cliffs.

Key characteristics

• Near-complete grey rosettes 2–3cm diam., of short, thick fan-like lobes with black discs
• Tests Pd+ faint orange.

NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database

iNaturalist: Species account : iNaturalist World Species Observations database

Original text submitted by Vince J. Giavarini