Description: Foliose lichen with a single-lobed thallus attached to the substratum by an umbilicus at the centre. Upper side brown, minutely dissected into islands by black lines, perforated or shredded towards the margins. Lower surface patchy grey to black with attachment structures: rhizinae. Discs frequent with a whirly surface ornamentation (gyrose). Mountain rocks and boulders: throughout Ireland.

Key Identification Features:

• Lower surface patchy grey to black
• Upper side crinkled into a mosaic of islands and lines, some lobes perforated or shredded.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Umbilicaria torrefacta at iNaturalist World Species Observations database.