Anamorph: conidiomatal locules formed within the stromata, often multilocular, convoluted and radiating from the centre, probably preceeding perithecial formation. Conidiophores hyaline, septate, branched irregularly at the base and above, formed from the inner cells of the locule walls. Conidiogenous cells not clearly distinct morphologically from the conidiophores, usually formed as long distinct branches, straight, hyaline, smooth, proliferating percurrently, collarette and periclinal thickening inconspicuous. Conidia (4-) 6-8 (-13) x 1-1.5 (-2.5) µm, cylindrical to allantoid, hyaline, thin-walled, aseptate, without guttules, often extruded as globose droplets or tendrils. Teleomorph: stromata 1-2 mm diam., the exposed part conical, prominent, often erumpent through a small transverse fissure, containing 6-12 ascomata. Ectostromatic disc at first slightly yellowish, then becoming greyish white, dotted with black perithecial necks. Entostroma white to greyish, composed of interwoven hyphae with some host cells intermixed in the lower part, well-developed, delimited by a conspicuous black stromatic zone line, particularly prominent beneath the perithecia. Ascomata perithecia, 250-750 µm diam., ± globose with elongate necks 250-900 µm long and 90-400 µm wide at the base, black, upright to oblique, necks converging, emergent through the disc but only just exceeding the upper surface. Peridium 20-25 µm thick, composed of dark, thick-walled angular cells. Interascal tissue absent, but neck periphysate. Asci (46-) 56-66 (-81) x (7-) 9-14 (-17.5) µm, cylindrical-clavate with a tapering base, apically thickened, with a refractive I- apical ring, becoming detached within the perithecial cavity, 8-spored. Ascospores (8-) 13-20 (-30) x (2-) 3-5 µm, allantoid to cylindrical, hyaline, aseptate, smooth- and thin-walled, without a gelatinous sheath or appendages.