Anamorph: not known.
Teleomorph: ascomata apothecia, hypogenous, to 350 (-500) μm diam., immersed in leaf tissue, sessile, discoid, opening by a variable number of irregularly torn teeth, the hymenium swelling when wet to become domed. Exciple dark brown below. Disc grey-green to ochre. Interascal tissue of paraphyses, cylindrical, septate, 2–3.5 (–4) μm diam., clavate (ca 5 µm diam.) and pigmented greenish brown at the tip. Asci 50-65 × 6-9 μm, cylindrical to clavate, arising from croziers, with a small pore blued by iodine, 8-spored. Ascospores biseriately arranged, 7.5-10 × 3-4 µm, ellipsoidal or rarely ovoid-ellipsoidal, aseptate, hyaline, without a gelatinous sheath or appendages.
Description adapted in part from Greenhalgh & Morgan-Jones (1964).
On dead leaves of Prunus laurocerasus and P. lusitanica.
Common throughout Britain and Ireland.