Anamorph: conidiomata absent. Conidiophores (25-) 40-50 (-80) µm long, tapering uniformly from ca 3.5 µm diam. at the base to ca 2 µm at the tip, 1- or 2-septate, roughened, proliferating percurrently with visible periclinal thickening, collarette inconspicuous. Conidia (5-) 7-9 x 4-6 µm, ellipsoidal to limoniform, unicellular, with a protuberant, flat basal abscission scar, smooth, hyaline. Teleomorph: ascomata perithecia, in clusters of up to 20 from a small basal cushion, surrounded by cottony, conidiogenous white mycelium (yellowish when wet), (260-) 330-400 (-480) µm tall, (160-) 220-250 (-360) µm diam., narrowly ovoid, at most slightly constricted below the apex, smooth, yellow to yellow-orange, not changing colour in KOH, collapsing by lateral pinching. Cells of the perithecial wall surface formed of densely intertwined hyphae. Perithecial wall 20-30 µm thick, composed of flattened, compressed cells. Ostiolar region formed from thin-walled elongate cells, the terminal cells subglobose to slightly clavate, 6.5-12 x 5-7.5 µm in size, lined with well-developed periphyses. Interascal tissue absent. Asci (110-) 130-210 (-235) x (3.5-) 5-8 (-9.5) µm, narrowly cylindrical, with an elongate tapering base, thin-walled and not fissitunicate, the apex with a conspicuously thickened cap, 8-spored. Ascospores fasciculate, 35-75 x 1.5-3.5 µm (measured in the asci) narrowly cylindrical, 0- or 1-septate, hyaline, smooth, without an epispore, gelatinous sheath or appendages. Discharged ascospores 130-185 x (4.5-) 5-6 (-6.5) µm in size, to 15-septate.