Colonies on oatmeal agar and malt extract agar 40-50 mm diam. in 7 days at 20°C; aerial mycelium in tufts, grey-olivaceous to dark olivaceous. Pycnidia brown to black, immersed, superficial or produced in the aerial mycelium, solitary to gregarious, globose, 110-280 µm diam.; with 1-many, cylindrical, 30-35 µm -long ostioles. Conidia hyaline, unicellular, oblong to elliptic, biguttulate, 3.5-7 x 1.5-3 µm.

COLONY MORPHOLOGY OA: Colonies 45-55 min diam. after 7 days. Mycelium; cottony, in numerous, small tufts, pale to dark grey or olivaceous at centre of colony, white at edge. Reverse; dark grey middle, saffron outside. ME: Colonies 35-45 mm. Mycelium; cottony, fine, often sparse, aggregated into small, scattered tufts, light to dark olivaceous at the centre of the colony, pale at tips of the tufts, broad, white marginal band. A ring with numerous pycnidia and no aerial mycelium may form halfway between centre and edge of colony. Reverse; olivaceous centre, amber edge. CHLAMYDOSPORES: None, but numerous, pale brown, thin-walled swollen cells, which develop into pycnidia, form in the aerial mycelium. CONIDIA: Uniform in shape, oblong with rounded ends, often with a large vacuole at each end. (3.5-) 5-7 x (1.5-)2-3 µm. PYCNIDIA: Often with more than one ostiole, solitary or in groups of 2-3 with confluent walls, with prominent ostiolar beaks, 30-35 µm long.