Order: Lecanorales Family: Lecanoraceae
Species: Lecanora barkmaniana
Photos: On Lime. Bantry, Co. Cork, SW Ireland.
Identified by Brian Coppins
A recently described member of the Lecanora subfuscata group.
Finely cracked, powdery, pale greyish thallus with a paler whitish-grey prothallus. Punctiform soralia with pale yellowish-green soredia spread to cover much of the thallus. Apothecia rare, discs pale brown with crenulate greyish margins. Pycnidia are absent.
Thalus K+ yellow, C-, P-, rarely P+ yellow
Found on dust- or nutrient-enriched wayside trees. Scattered distribution in Ireland, probably under-recorded.
Similar: L. compallens, K-, C-. L. expallens, C+ orange
Lecanora barkmaniana May 2010