Following the thread of Lieve Deceuninck's message in this same forum http://www.ascofrance.com/search_forum/48820 about Mollisia pteridis Gillet, I have found several cupulate and sessile ascomata up to 0.5 mm in diameter, KOH negative, on blackened parts of Pteridium aquilinum rachis. The exccipulum is hairy and formed by a brownish textura angularis which on the flanks of the fruitbodys forms septate, long and pigmented hairs, while on the margin these are also long but hyaline.
The paraphyses have small vacuoles that stain in cresyl blue, but do not contain the large cylindrical and refractive VBs typical of the genus Mollisia.
This fungus that Ellis & Ellis assimilate to Mollisia pteridis and that fits very well with the drawings they make of the lateral and marginal hairs, could also fits with Gillet's succinct description.
What do you think?