Description: This crustose epiphyte with a smooth to slightly warted grey to grey-green thallus is a common sight on trees in Ireland. It does best on ash, sycamore, maples, wayside poplars and fruit trees and others with smooth basic bark that is slightly roughened. The flat to convex brown-black discs are highly conspicuous against the grey of the thallus. It is evenly distributed throughout Ireland.

Key Identification Features:

• The dark brown to black fruits on a smooth, grey thallus helps to suggest this species
• It is separated from dark-fruited examples of Bacidia arceutina by the larger discs and the purple tinge to the edge of the disc sections that are not obvious using the naked eye alone.

Original text submitted by Simon Davey

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

iNaturalist: Bacidia laurocerasi at iNaturalist World Species Observations database.