Anamorph: not known.
Teleomorph: ascostromata perithecia, 200-300 µm diam. and 300-400 µm high, pyriform, immersed in host tissue with a short conical neck 70-100 µm long and 50-70 µm diam., dark brown, the surface of the substratum often pink- to red-pigmented. Interascal tissue of thin-walled pseudoparaphyses 2-3 µm diam., longer than the asci. Asci 120-135 (to 180 µm fide Walker 1980) x 4-5 µm, numerous, long cylindrical with a short foot-like base, fissitunicate, thickened to 2 µm at the apex (to 6-7 µm in immature asci). Ascospores helically arranged and probably longer than the ascus, 1.5-2 µm diam., filiform, the apex obtuse and the base acute, indistinctly multiseptate, pale yellowish brown in mass, without an epispore, gelatinous sheath or appendages.
Not formally assessed, but the species is common and widespread.
Presumably saprotrophic, on dead stems of a very wide range of herbaceous plants, especially Anthriscus, Arctium, Cirsium, Epilobium, Heracleum, Rumex and Urtica.
Throughout Great Britain and Ireland.