Apothecia solitary or in small clusters, superficial; disc convex or repand, olive-green, drying black, up to 5 mm. diameter; receptacle obconical with a short, stout, longitudinally furrowed base, pruinose throughout with minute, downy, blackish-brown hairs. Flesh composed of tightly woven hyphae, light brown in section, subhymenium thin, dark brown; excipulum dark brown, that of the stalk composed of undulating short-celled hyphae, approximately at right angles to the surface, that on the under side of the receptacle appearing pseudoparenchymatous in section, with angular, thin-walled, brown cells 10-15um across, that on the flanks of the hymenium composed of brown, parallel, slender hyphae, with clavate terminal cells. Excipular hairs short, thin-walled, brown, with rounded and swollen tips about 10um across. Asci narrowly clavate-cylindric, 115 x 6um, 8-spored, pore blued by Melzer's reagent; ascospores uniseriate, elliptic-cylindric or slightly allantoid, 10-12 x 2.5-3.5um; paraphyses cylindrical, slightly enlarged to 3um at the tip. On dead wood, not stained green.