Colonies black, thin and effuse.Mycelium mostly immersed, composed of branched, septate, pale brown to brown hyphae 2-5um wide.Conidiophores arising singly. occasionally in tufts of 2 or 3, erect, straight or slightly bent, cylindrical, 100-135um long and 7-10um wide. thickwalled, dark brown to black toward the base which is swollen up to 12.5um and surrounded by pseudoparenchymatous cells forming a very dark brown to black stroma up to 35um wide. Conidiophores are paler toward the apex, up to 3-septate with the cells 30-50um long, and terminate in a conidiogenous cell. Conidiogenous cells 19-20um long. basally brown distally pale brown to brown and funnel-shaped at first bluntly rounded at the apex: the distal part of the pigmented outer wall of the conidigenous cells becomes torn as the hyaline, inner. thickerwalled layer expands outwards, thus differentiating it funnel-shaped structure composed of the ruptured distal outer wall of the conidiogenous cell. Up to 15 conidia are produced successively in a cluster on the hyaline extension which becomes subglobose and up to 21um wide. The hyaline conidiogenous cell finally extends upwards into it hyaline, subulate thick-walled (up to 4um) structure which is rounded at the apex, up to 4-septate, and up to 150um long.

Conidia are blastic broadly ellipsoidal. pale brown, to brown, smooth, 3-septate (pseudoseptate), thick-walled (up to 3µm), and measure 21.5-32.5(-43) X ( 11.7-)12.5-14.5µm. The first septum is central and the additional septa arise more-or-less simultaneously rear the ends of the initial, so the two central cells are large and the polar cells, are much smaller. Conidia are somewhat pendant at maturity with the conidium scar lateral rather than strictly basal. A proliferation from the basal septum of a presumably aborted conidiogenous cell has been seen with another conidiogenous cell formed at the apex of the proliferatio n: this gives the appearance of the collarette of a proliferated phialide.