Description: This crustose, lime-loving species should be searched for among moss on shady, mortared walls as well as on basic-barked trees and short limestone turf. It has a coarsely granular thallus with large, convex discs that vary in colour from beige to pink to black. It is common in suitable habitats throughout Ireland.

Key Identification Features:

• The granular thallus, habitat, and convex pink-red discs should suffice to identify this species
• It is best to first find it on a mossy wall where it is least likely to be confused with other species.

Original text submitted by Simon Davey

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

iNaturalist: Bilimbia sabuletorum at iNaturalist World Species Observations database.