Cucurbitaria rubefaciens  

Anamorph: unknown.

Teleomorph: Stroma poorly developed, some hyphal development visible between bark and wood. Ascomata 250-350 µm diam, ± spherical, minutely papillate, forming individually or in groups of 2-3, hardly erumpent, with reddish soluble pigments produced in the ostiolar region. Peridium composed of an outer layer of strongly melanized rather irregular textura angularis with cells to 10 µm diam, and a wide inner layer of similarly shaped but less strongly melanized cells, the locules lined with thin-walled hyaline cells. Interascal tisue composed of copious branched and anastomosing pseudoparaphyses ca 2 µm diam, tending to fragment at maturity. Asci 116-144 x 12-13.5 µm, cylindrical, usually rather short-stalked, fairly thick-walled and fissitunicate, the apex rounded with a rather inconspicuous apical invagination in the inner wall, 8-spored. Ascospores 21-24 x 8-9 µm, clavate-ellipsoidal, strongly constricted at the ± median primary septum, the upper part ellipsoidal and the lower part fusiform-ellipsoidal, mid brown, without a mucous sheath, with 4(-6) secondary transverse septa, and usually most of the non-apical segments subdivided by a longitudinal septum, the arrangement rather irregular.

The shape and ± immersed nature of the ascostromata are not typical of Cucurbitaria.