Description: Where the mortar of walls is old and crumbly the much contracted, thick and gristly thallus of this poorly understood species should be looked for. The olive green to red-black shiny surface, turned-down edges of the thick lobes, and numerous granular isidia should help to identify it. Discs are rare, but when present are surprisingly plentiful. Under-recorded: Counties Donegal, Antrim and Kerry only.

Key Identification Features:

• Thallus olive green to black, shiny with thick lobes turned down at the edges
• Isidia granular or globose when wet; calcareous soils and crumbly walls.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Scytinium turgidum at iNaturalist World Species Observations database.