Anamorph: not known. Teleomorph: stromata absent. Ascomata perithecia, scattered or in clusters of 2-8, visible from the surface as minute papillae surrounded by a weakly defined dark grey clypeal region, 300-400 µm diam., globose to slightly oblate, with a short apical papilla that just perforates the host tissues with a distinct, sometimes slightly angular pore. Peridium leathery, dark brown, 10-15 µm thick, composed of polygonal cells 4-5 µm diam. with a thin outer layer of intertwined hyphae ca 3 µm diam. Interascal tissue of simple unbranched paraphyses 3-4 µm diam. at the base and tapering to ca 2 µm diam. at the apex, developing in small clusters from basal cells, hyaline, thin-walled, not constricted at the septa. Asci 160-190 x 9-11 µm, cylindrical, with a short tapering stalk, thin-walled and not fissitunicate, rounded at the apex, with an apical ring staining blue in iodine, 3.5-4 µm diam. and ca 2µm in height, slightly narrowed upward. Ascospores uniseriate, 19-21.5 x 7-8 µm, ellipsoidal, usually slightly curved, 2-celled, constricted at the slightly thickened median septum, rounded at both ends, light to mid brown, finely striate (ca 20 ridges), with oil drops, gelatinous sheath not clearly visible in Irish material studied.