Species: Degelia plumbea sens. str.Growth type foliose. Identified by John Douglass
Photos: On Oak. Tomies wood, Killarney, Co. Kerry, SW Ireland.
Usually fertile, squamules present but lacks isidia. Thin lobes, bluish-grey, tinged +/- yellow-brown, network of linear maculae most noticeable towards margins. Blue-black hypothallus. Apothecia frequent, light reddish-brown. Ascus 8-spored, spores simple, colourless, 17-25 x 7-10 Ám. Microscope photographs below. Chemical reactions negative.
Occurs on well-lit trees in un-disturbed woodland, occasionally found on coastal rocks. Most frequent in western Ireland.
Similar: Degelia cyanoloma was recently restored to specific rank, having been formerly included with D. plumbea.
Also similar: Degelia atlantica and Pannaria rubiginosa