Anamorph: conidiomata pycnidia, 150-280 µm diam., black, hemispherical to oblate, immersed beneath the host cuticle, the ostiole not papillate, very inconspicuous. Upper wall to ca 10 µm thick (in addition to the cuticle), composed of small dark-walled globose to angular cells. Lower wall 20-25 µm thick, the cells largely occluded. Paraphyses not seen. Conidiophores ± cylindrical, short, hyaline, smooth, in a palisade lining the lower part of the conidiomatal wall. Conidiogenous cells 4.5-7 x 2.5-3 µm, terminal or intercalary, ± cylindrical to ampulliform, tapering towards a truncate apex with inconspicuous periclinal thickening, collarettes not seen. Conidia solitary, 20.5-23 x 2.5-3 µm, cylindrical, the apex rounded and the base slightly tapering with a minute scar, with large guttules, thin- and smooth-walled, without appendages or a gelatinous sheath.
Teleomorph: not known.
On a broad range of angiosperm leaves (usually leather and slow to decay), including Eucalyptus spp., Hedera helix ,Ilex aquifolium, Laurus nobilis, Prunus laurocerasus and Rhododendron spp. Presumably saprotrophic, perhaps initially endophytic.
Common throughout Britain and Ireland.