On moss-covered trunks of deciduous trees,
e. g. Fagus, Salix, Ulmus. Summer to winter. Widespread and common in the area covered, but becoming rare in Northern parts of Scandinavia. In Norway fairly common in southern parts.
Pileus 2-10 mm
across, campanulate, conical, sometimes becoming convex to applanate,
with or without a small papilla, shallowly sulcate, translucent-striate, glabrescent, very variable in colours, fairly dark brown with the centre blackish brown, turning paler brown with age or at
first pale grey-brown and dark brown at the centre, paler
with age, becoming very pale brown to beige, mostly darker
at the centre, sometimes entirely white, the margin usually white. Lamellae 8-14
reaching the stipe, ascending, narrowly to more broadly adnate, pale grey to white. Stipe
10-35 x 0.5-1 mm, hollow, curved, terete, equal, pruinose or minutely puberulous, glabrescent except for a pruinose apex,
white, occasionally yellowish towards the base
with age, the base covered with long, coarse, flexuous white fibrils. Odour
and taste indistinctive.
Basidia 25-35 x 6-7 µm, clavate, 2-spored (rarely 4-spored). Spores
7-9.5 x 5.2-7 µm, Q 1.1-1.5, Qav~1.3, broadly pip-shaped, smooth, non-amyloid.
30-55 x 9-15 µm, forming a sterile band, fusiform to utriform, smooth, usually broadly
rounded. Pleurocystidia similar,
if present. Lamellar trama weakly dextrinoid. Hyphae
of the pileipellis 2-4 µm wide, sparsely diverticulate, covered with usually simple, more rarely furcate, cylindrical, straight to curved excrescences 2-9 x 1-3 µm. Hyphae of the cortical layer of the stipe
2-6 µm wide, smooth, terminal
cells (caulocystidia) 12-55(-64) x 4-24 µm, variously shaped,
generally inflated, smooth. Clamps absent in 2-spored form, present in 4-spored.
Microphotos of cheilocystidia, pileipellis and caulocystidia
Phloeomana hiemalis was formerly recognized as a a member of Mycena sect. Hiemales. Usually it can be recognized by the growth
on moss-covered trunks of deciduous trees, the usually pale pileus
generally with a brownish centre, and the ascending, narrowly
adnate lamellae. It can, however, sometimes be confused
with P. alba
or with P. minutula. P. alba can be distinguished
by the hyphae of the pileipellis that are covered with scattered,
coarse, inflated, simple or broadly lobed excrescences,
and by the globose spores. P. minutula
differs in having a whitish pileus with a yellowish centre, smooth hyphae of the pileipellis and somewhat
differently shaped cheilocystidia. Dark brown specimens of P. hiemalis can be confused with Mycena erubescens, but the latter is easily separated on account of pointed pleurocystidia, reddening flesh and bitter taste.