Stromata absent. Ascomata immersed in plant tissues, usually thinly scattered, to 500 µm diam, subglobose with a papillate ostiole 40-50 µm diam that usually extends just above the leaf surface. Interascal tissue composed of cellular pseudoparaphyses to ca 2 µm diam. Asci 130-190 x 24-38 µm, cylindrical, thick-walled and fissitunicate, the endotunica indistinctly multi-layered, 8-spored. Ascospores 40-54(-60) x 14-18 µm, (3-)6- to 7-septate, fusiform, yellowish brown, often with the end cells paler than the others, with a well-developed gelatinous sheath that is divided at the primary septum and umbilicate at the apices.
Anamorph: Amarenographium metableticum. Conidiomata pycnidial, 200-450 µm diam, scattered, subglobose, weakly papillate with an ostiole that just penetrates the epidermis. Conidiophores hyaline, septate, irregularly branched, apparently deliquescent by the time that the conidia are mature. Conidiogenous cells cylindrical, holoblastic, not proliferating. Conidia 22-30 x 9-13 µm, yellowish, fusiform to ellipsoidal or ovoid, the ends acute to rounded, hardly constricted at the median point, with 3-7 transverse septa with some segments with 1(-2) longitudinal septa, conidial wall thick and 2-layered, with large ± globose gelatinous appendages at each end.