Description: This crustose epiphyte has a yellow-green thallus composed of minute isidia-like granules. Discs (to 1mm diam.) are common, orange-brown to almost red with pronounced margins. These are quick to attract the attention of the lichen hunter. It occurs on the basic bark of nutrient-rich trees, and is relatively frequent throughout Ireland.

Key Identification Features:

• The habitat, granular, yellow-green thallus and reddish-brown fruits are diagnostic
• It often occurs squeezed in between foliose species.

Original text submitted by Simon Davey

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

iNaturalist: Bacidia rubella at iNaturalist World Species Observations database.