Mycelium superficial, membranous, composed of branched brown thick-walled and sometimes verrucose, ± moniliform strongly gelatinized hyphae. Anamorph: conidiomata pycnidial, very variable in shape, usually narrowly ovoid with an extended neck, thin-walled, composed of overlapping broad flattened hyphae which become narrower in the neck region. Ostiole surrounded by hyaline tapering setose extensions of the neck hyphae. Conidiogenesis not clear. Conidia initially small, hyaline and bacillar, when mature 11-24 x 5-11 µm, becoming mid brown, usually with three transverse septa and often with one or more cells subdivided by a vertical septum, not or hardly constricted at the septa, smooth, without an epispore, gelatinous sheath or appendages. Teleomorph: ascostromata ovoid, to 350 µm tall and 200 µm diam., unilocular, black, smooth, ostiolate, composed of angular cells. Interascal tissue not present, or deliquescent. Asci 40-75 x 20-27 µm, obovoid to saccate, fairly thick-walled, fissitunicate, 8-spored. Ascospores arranged biseriately, 20-26 x 8-14 µm, clavate to cylindric-clavate with rounded ends, slightly constricted at the mid septum and with two further transverse septa, some or all cells subdivided with straight to oblique longitudinal septa, brown, smooth, without an epispore, gelatinous sheath or appendages.