Thallus granular-squamulose, often rather glossy, more rarely finely granular, greenish grey, forming a crust or restricted to small patches. Photobiont Stichococcus.
Anamorph: no information available.
Teleomorph: ascomata stalked mazaediate apothecia, 1-1.9 mm tall, 12-38 times as long as the width of the stalk. Stalk 50-100 µm diam., the upper part often with a faint whitish pruina, the lower part black. Head obconical- to lens-shaped. True exciple well-developed, sometimes with a faint whitish pruina below. Asci shortly cylindrical or irregular, formed in chains. Ascospores uniseriately or partially biseriately arranged, 3-4 μm diam., globose, aseptate, golden brown, smooth or with inconspicuous irregular, narrow cracks.
Chemistry: lichen products not detected by TLC.
Assessed by Woods & Coppins (2012) as of Least Concern.
Frequent in NE England & E Scotland, occasional elsewhere, but rare in Ireland. BLS map here.
In dry, acid bark crevices and on rotten wood.