Diaporthe laschii  

Description contributed by Graham Kinsey, CABI, based on Wehmeyer (1933).

Anamorph: Phomopsis foveolaris (Fr.) Traverso (1906). Conidiogenous cells 15-20 x 1-2 µm. Alpha-conidia 10 x 2.5-3 µm.

Teleomorph: stromata scarcely visible on host surface, ostioles barely erumpent, entostroma irregularly pustulate effuse, pustulate areas rather widely extended within the bark, dorsal zone usually present only where it dips into the bark and absent from the bark surface. Ascomata 400-640 x 320-480 µm, scattered singly or in small groups within the pustulate areas, usually separately erumpent, ostioles short-cylindrical. Asci 55-67 x 7-9 µm, clavate, with a refractive apical ring. Ascospores 13-17.5 x 3.5-5 µm, fusiform-ellipsoidal, constricted at the septum, 4-guttulate, often with a faint hyaline appendage at each end.

Identifications have been confused with an unnamed member of the 'eres' group on Euonymus.