Occuring i Northern
parts of Europe. Rare (NT°) according to the Red List Of Threatened Fungi In Norway.
Densely gregarious to fasciculate on decayed wood of deciduous
trees, typically Fagus. Often in great numbers. Late autumn to early winter. Records in The
Norwegian Mycological Database.
mm across, at first hemispherical, then conical, parabolical,
convex to almost plane, sometimes with recurved margin,
often with a small umbo but also at times slightly depressed
at the centre, pruinose, glabrescent, not or very shallowly
sulcate, not striate or only striate at the margin, lubricous
to somewhat viscid, hygrophanous, dark brown with black-brown
centre to pale brown, darker at the centre and paler at
the margin, which often is whitish, or beige-brown to greyish
beige with whitish margin. Lamellae
23-28 reaching the stipe, ascending-arcuate, broadly adnate,
decurrent with a tooth, with age subhorizontal, elastic-tough,
somewhat veined and forked with age, whitish, pale grey
to pale brown, sometimes with brown spots, and in some collections
with a pink flush. Stipe 15-45 x 1-3 mm, hollow in the upper part, terete, equal, straight,
curved or somewhat flexuous, tenacious, pruinose at the
apex, glabrous farther down, whitish to greyish when young,
mostly with whitish apex and darker below, then becoming
more yellow brown, the base densely covered with whitish
fibrils. Flesh tenacious, greyish to whitish. Odour
Basidia 15-28 x 4.1-5, 4-spored, with sterigmata 2.5-4.5 µm long. Spores
4.5-6.5 x 2-3 µm, Q = 1.8-2.4, Qav = 2.2, narrowly pip-shaped, smooth, amyloid.
15-35 x 8-14, clavate to somewhat irregularly shaped, covered
with fairly few, unevenly spaced, coarse, simple to branched, more or less curved
excrescences 1.5-11 x 1-2 µm. Pleurocystidia
absent. Hyphae of the pileipellis
1-3 µm wide, embedded in gelatinous matter, more or less smooth or with scattered excrescences, often
undulate. Hyphae of the cortical layer of the
stipe 1.5-4 µm wide, embedded in gelatinous matter, smooth
to covered with excrescences 2-10 x 1-1.5 µm, terminal cells widened to 7 µm, variously shaped, coarsely divericulate. Clamp connections present at all tissues.
Microphotos of cheilocystidia 1
Microphotos of cheilocystidia 2
Microphotos of hyphae of the cortical layer of the stipe and terminal cells.
Mycena tintinnabulum is a member
of sect. Mycena, where it can be identified by
the more or less fasciculate growth, generally on Fagus stumps, and often in great numbers, late in the autumn and
also during mild winters. The thick gelatinous pellicle,
which gives it a viscid, lubricous or shiny appearance is
a typical feature. Microscpoically it is first of all characterized
by the very small spores,
that separate it from all the other species in the section.
Further images on the Internet: