On (usually moss-covered) bark of various
living deciduous trees. Autumn to winter. Widely distributed in Southern Norway,
however not very common. See
The Norwegian Mycology Database.
Pileus up to 10
mm across, hemispherical, parabolical to convex,
often somewhat flattened or depressed centrally, sulcate, translucent-striate, pruinose, vinaceous red, brownish pink, dark
violet, pale brown with a lilaceous tinge, turning more
brownish at age. Lamellae 6 -
14 reaching the stipe, broad, the edge convex, ascending
to subhorizontal, adnate, more or less decurrent with a
short tooth, at first concolorous with the pileus, pallescent,
turning whitish, finally more or less sepia grey-brown,
the edge paler. Stipe curved,
pruinose to white-floccose, glabrescent, becoming shiny,
more or less concolorous with the pileus, the base densely
covered with long, white fibrils. Odour none.
Basidia 30-36 x 10.5-13.5 µm, clavate, 4-spored,
clamped or 2-spored, clampless. Spores
from 4-spored basidia 8-11 x 8-9.5 µm, from
2-spored basidia up to 14.5 µm, globose to subglobose,
amyloid. Cheilocystidia
15-40 x 6-14 µm, occurring mixed with the basidia, clavate, clamped or clampless,
covered with unevenly spaced, simple to branched, curved
to tortuous excrescences up to 12.5 µm long. Pleurocystidia absent. Lamellar trama vinescent in Melzer’s reagent. Hyphae
of the pileipellis up to 9 µm wide, covered with warts
or cylindrical excrescences. Hyphae of the cortical
layer of the stipe diverticulate, the terminal
cells up to 80 µm long, usually slender, clavate,
diverticulate.
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M. melligena and Mycena pseudocorticola
Kühner can often be found growing together on
the same trunk. M.
pseudocorticola seems to be more common.
Young, fresh specimens of the two species are not
difficult to separate, but with age they both turn
more brownish and can be hard to identify macroscopically.
Microscopically they are very similar too. Maas Geesteranus
(1982a) pointed at a quite reliable character to tell
them apart in the shape and size of the terminal cells
of the stipe cortex. In M.
pseudocorticola these cells are stubby, not
longer than 37 µm, whereas much longer, more
slender, cells are by far the more common kind in
M. meliigena.
The brown colours in older specimens
may cause confusion with M.
supina (Fr.) P. Kumm., but that species have
cheilocystidia with only short excrescences. M.
juniperina Aronsen has a pale yellowish
brown pileus and grows on Juniperus communis.
Go to key
to sect. Supinae.
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Further images
on the web:
Yves
Deneyer
Yves
Deneyer 2
Yves
Deneyer 3
Mycologie
en Catalogne nord |
