Description: S. myrticola is a crustose species with a chalky-grey, uneven, lumpy white thallus with slightly raised, pruinose patches packed with a tiny mosaic of grey-black discs (lirellae) of brain-like appearance. It is a lichen of coastal dry rock crevices and sheltered underhangs. In Ireland, the species occurs in County Kerry and the Blasket Islands but there are few modern records.

Key Identification Features:

• Chalky thallus with some raised frosted patches containing a dense mosaic of grey-black brain-shaped discs
• In dry rock crevices and under overhanging rock near the sea.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Syncesia myrticola at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Syncesia myrticola at iNaturalist World Species Observations database.