Known from west Mayo, this species of Caloplaca (best seen on sallow, but also on heather stems) colonises twigs and small branches of isolated trees, often in remote or far-flung places. The small grey thalli are abundantly fertile with rust-red discs.

Key characteristics

• On small branches and twigs of sallow
• Thallus tiny, grey with abundant rust-red discs.

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