Anamorph: not known.
Teleomorph: ascomata perithecial, developing from superficial vegetative hyphae running along the furrowed veins of the adaxial face of the host leaf; 80-100 µm diam., ± pyriform with a short wide truncate neck ca 60 µm diam. and 30 µm tall. Peridium composed of dark brown thick-walled angular cells 6-9 µm diam., apparently without an inner layer. Interascal tissue not seen (but described as sparse septate interthecial threads by Holm, 1979). Asci few (<10), 50-55 x 20-25 µm, saccate to ovoid with a short stalk, the apex rounded, rather thin-walled and possibly not fissitunicate, apical structures not clearly visible, 8-spored. Ascospores arranged irregularly, 14.5-16 x 7.5-8.5 µm, broadly clavate, with a slightly constricted submedian septum, becoming pale brown, thin- and smooth-walled, without a gelatinous sheath or appendages.
Not formally assessed and very probably under-recorded. It would potentially be considered as Vulnerable bearing in mind the paucity of records and the restricted distribution of its host plant.
The minute broad-mouthed perithecia formed on superficial mycelium in furrows on the upper leaf surface are diagnostic.
Apparently restricted to dead leaves of Dryas octopetala.
Known from a single collection (on a single leaf!) from a site in W Ross. Reported from various localities in arctic-alpine regions of Scandinavia and Central Europe.
No research is available, but possibly a saprobe acquiring nutrition from leaf exudates.