Description: This epiphyte of old, mossy bark may be known at once by the bright orange or yellow-orange discs (up to 2mm diam.) ringed by paler orange (or yellow) margins. The thallus, a grey-green colour, grows as a spreading crust over the surface of mosses sometimes binding them into its structure. It can tolerate both damp and shade.

Key Identification Features:

• Unique bright orange discs with paler margins on a crust spreading across (or hidden within) mossy bark
• Mainly old woodland trees in areas with a long tree canopy history.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Coenogonium luteum at iNaturalist World Species Observations database.