ascoma_shape_perithecia
<perithecia> perithecial
basal, central, black, obtusely rounded nucleus 120-180 µm diam, composed of dark brown, thin-walled, pseudoparenchymatous angular cells originating from the perithecial wall; margins subglobose, 0.35-0.45 mm diam.
Hypoxylon ribicolor
Hypoxylon ribicolor