Diplodia confluens  

Anamorph: conidiomata pycnidial, solitary or aggregated and sometimes confluent, immersed in the host, partially emergent at maturity, dark brown to black, ostiolate, non-papillate, thick-walled, outer layers composed of dark brown angular cells, inner layers of thin-walled hyaline angular tissue. Conidiogenous cells 7-9 x 2.5-4 μm, hyaline, thin-walled, smooth, cylindrical to truncato-conical, proliferating percurrently with periclinal thickening. Conidia 22-24.5 × 8.5-9.5 μm, ovoid-cylindrical to cylindric-ellipsoidal, straight or slightly curved, the apex rounded and the base rounded to truncate and sometimes somewhat eccentric, hardly constricted at the narrow ± median septum, initially hyaline, becoming dark brown, thick-walled, smooth, without an epispore, gelatinous sheath or appendages.
Teleomorph: not known.