Description contributed by Graham Kinsey, CABI, based on Wehmeyer (1933).
Anamorph: Phomopsis epilobii (Preuss) Petr. (1921). Conidiomata 200-300 x 100-140 µm. Conidiogenous cells 7-10 x 1.5-2 µm. Alpha-conidia 5-10 x 2-2.5 µm.
Teleomorph: stromata on the host surface as elongate blackened patches, abruptly but not prominently margined, limited in area (1-3 mm) or confluent and extending for some distance, surface of bark heavily blackened, ventral zone definite, just within the wood. Ascomata scattered singly, erumpent with very short ostioles. Ascospores 11-12 x 2.5-3.5 µm.
Wehmeyer considered this to belong within the D. pardalota aggregate.