Description contributed by Graham Kinsey (CABI).
Teleomorph: stromata absent. Ascomata 200-300 µm diam, crowded, often in groups of 2-3, the necks central, 250-350 x 60-100 µm and straight, broad and tapering upwards. Peridium 10-12 µm thick, composed of ca 3 layers of cells. Asci 30-45(-50) x 5-6.5 µm, 4-spored, sometimes with a further 1-4 smaller degenerated spores. Ascospores 12-18 x 2.5-3 µm, narrowly ellipsoidal, septum median, with appendages, each cell containing 2 large guttules at maturity.
The systematic position of this species is uncertain; it was not treated by Sogonov et al. (2008). Morocko & Fatehi (2007) considered that it belonged within the main Gnomonia clade, but more detailed molecular analysis is needed.
On dead stems and leaves of Rosa and Rubus.
From England (including South Devon, West Gloucs, East Kent, West Norfolk, Surrey, Warwicks), Scotland (Clyde Isles, Mid Ebudes) and Wales (Merioneth).
Pathogenic, reported as causing necrotic lesions and dieback of Rubus stems, and of cold-stored Rosa tissues.