Diaporthe nobilis  

Description contributed by Graham Kinsey, CABI.

Anamorph: Phomopsis laurella (Sacc.) Traverso (1906). Conidiogenous cells 8-12 x 1.5-2.5 µm. Alpha-conidia 7.5-10 x 2.5-4 µm, ellipsoidal to obovoid, usually 2-guttulate.

Teleomorph: stromata broad, host surface blackened above the perithecia or only slightly so, periderm raised, with a distinct black margin or with a contorted black zone in the wood, with the epidermis blackened above the perithecia. Ascomata ca 750 µm diam., scattered singly or gregarious, immersed in bark or in leaf midrib, ostiole scarcely emergent. Asci 42-56 x 7-9 µm, elongate-clavate, with a refractive apical ring. Ascospores 11-16 x 2-4 µm, ellipsoidal-fusiform, constricted at the septum, 4-guttulate, initially with a hyaline appendage at each end.