Description contributed by Graham Kinsey, CABI, based on Wehmeyer (1933).
Anamorph: Phomopsis dulcamarae (Sacc.) Traverso (1906). Conidiogenous cells 25 x 1.5 µm. Alpha-conidia 8-10 x 2 µm.
Teleomorph: stromata on host surface as numerous ostioles, erumpent singly or in loose groups of 2-3, entostroma widely effuse, surface of bark or wood usually heavily blackened, ventral zone usually deep in wood or often along the margin of the pith. Ascomata 400-600 x 300-400 µm, scattered singly, usually embedded in the wood and often causing slight pustulate swellings, ostioles short-cylindrical. Asci 52-60 x 8-9 µm, clavate, with a refractive apical ring. Ascospores 13-15(-17) x x 2.5-4(-5) µm, fusiform-ellipsoidal.