Hi,

Collected on Marchantia polymorpha:
Apothecia subsessile, 2,5-3,5 mm diam., disc flat, yellowish orange, outer surface slightly paler, margin with inconspicuous hyaline hairs. Asci operculate, cylindrical-clavate, IKI-, biseriate 8-spored, e.g. 260-285x27-29 µm.Spores ellipsoid to ovoid, (25)31-34x15-18(20) µm, smooth, hyaline, guttulate, most probably with 1-2 large LBs but disturbed by frost. Several misshapen spores due to frost.Paraphyses 4 µm diam., branched, tip clavate and 9-12(15) µm diam., with pale orange granular content.Ectal excipulum of thick-walled, hyaline textura globulosa-angularis, covered with hyaline, thick-walled hairs, 0-3-septate, 65-135x13 µm.
This is probably a Neottiella but I do not know any species with such large spores.
Any help is welcome.

Bernard