I found this wierd Mitrula-like fungus in an Alnus swamp on the Danish island Læsø. It grew mostly on last years Alnus cones dropped in the swamp, in some instances also on Alnus twigs:

Frb. 12-28 mm high with a ± globose, sometimes hollow, 2-7 mm broad, pale brownish head; stipe 1-2 x 8-17 mm, concoloures abowe, darker below (dirt?).

Spores flattened ellipsoid or cylindrical, smooth, wall thin, without septae or in a single spore with one septum, hyalin, non-amyloid, 13-21 x 3-4 µm; asci cylindrical, wall unitunicate, with 8 spores, 90-170 x 20-21 µm, apical apparatus blue in Melzer; paraphyses cylindrical, 1,5-2,5 µm wide; septate, branched several times (almost fasciculate), cylindrical, nonconstricted at the septae, with blunt apices containing yellowish droplets; exipulum a textura intricata.