In Norway found in alpine habitats, on small
twigs and other plant debris on the ground, often apparently
growing on the ground, under Salix lapponum, and
probably under other Salix species. Single to gregarious.
On one location in great numbers on sandy soil in Salix
shrub.
Pileus up to 13
mm across, acutely conical in young stages, becoming broadly
conical with age, sometimes with a small umbo or papilla,
sulcate, translucent-striate or not striate, pruinose, glabrescent,
fulvous, usually with a dark brown centre, somewhat paler
at the margin, drying to yellowish brown; sometimes appearing
with a pink colour. Lamellae 13
- 16 reaching the stipe, ascending, narrowly adnate, not
decurrent with a tooth, yellowish to pale fulvous, sometimes
with a pink tinge. Stipe up to
65 x 1 mm, somewhat firm, hollow, terete, equal, straight
to somewhat flexuous, pruinose, glabrescent, fulvous to
brownish, often fairly dark, the base densely covered with
coarse, long, flexuous, whitish fibrils. Odour
of iodoform when drying.
Basidia
22-30 x 5.5-7.5 μm, clamped, slenderly clavate, 4-spored,
with sterigmata up to 5 μm long. Spores
8.0-10.5 x 4.3-5.5 μm, broadly pip-shaped, smooth,
amyloid. Cheilocystidia
14-32 x 6-14 μm, forming a sterile band, clamped, clavate,
covered with more or less evenly spaced warts and cylindrical
excrescences up to 5 x 0.5 μm. Pleurocystidia absent.
Lamellar trama ......Hyphae
of the pileipellis 1-5 μm wide, clamped,
covered with warts or simple to branched, straight to curved
cylindrical excrescences, tending to become somewhat gelatinized,
and eventually forming dense masses. Hyphae
of the cortical layer of the stipe 1.5-4
μm wide, clamped, not gelatinized, covered with warts
or straight to somewhat curved cylindrical to conical excrescences
2-5 x 1 μm, terminal cells cylindrical to clavate,
diverticulate.
This taxon has in Norway been recognized as
Mycena alexandri Sing., which is a species known
from North America. There are, however, several differences
that indicate that the Norwegian taxon is a separate species.
- Mycena alexandri occurs in America on fallen
pine needles and not in alpine Salix shrub.
- Mycena alexandri was described with a larger
number of lamellae reaching the stipe (17 - 20).
- The lamellae of Mycena alexandri are adnate,
decurrent with a small tooth.
- The lamellae were described as pale dingy reddish
brown.
- The pink colours, sometimes observed in the Norwegian
taxon, were not mentioned for M. alexandri.
- The spores of M. alexandri are much smaller
(6.3-8.1 x 4.0-4.9 μm measured by Maas Geesteranus,
1984, and 7-8 x 3.5-4 μm measured by Smith, 1947).
- The cheilocystidia of M. alexandri are more
irregularly shaped, with excrescences, which are both
simple and branched, up to 14.5 μm long (Maas Geesteranus,
1984).
The taxon is, no doubt, closely related to
Mycena alexandri. It has, just like the American
species, a decided resemblance to species of the genus Galerina.
The fulvous or tawny to ochraceous colours in all parts
are very peculiar for a Mycena. The Galerina-like
appearance was also mentioned by Gulden & Jenssen (1982).
On this basis it will formally be proposed
as a new species.
Norwegian records:
FINNMARK:
VADSØ, Vestre Jakobselv, mellom Førstefossen
og. Andrefossen. Høgstaude-bjørkeskog, 1979.08.03,
Høiland, Klaus; Østmoe, Knut H. 161-79 <Note:
Ytterligere opplysninger vedlagt (KØ & GG).>
(O-F162197).
HORDALAND:
ULLENSVANG, Maurset. Oligotrphic birch, 1971.08.09, Gulden,
Gro 853/71 (O-F162196).
ULVIK, Finse. At the road between the station and tourist.
hut, in Salix scrub, with M. epipterygia, M. filopes, 1977.09.08,
Gulden, Gro 162/77 (O-F162195).
ULVIK, Finse, S-side of Nordnut. Plot no GG10. Geranietum
silvatici alpicolum facies Salicetosum on twings, 1978.09.07,
Gulden, Gro 327/78 <Note: Ytterligere opplysninger vedlagt
(GG).> (O-F162198).
ULVIK, Finse, u/Nordnut. in Rumiceto-salicetum, lapponum,
under Salix lapp.bush, 1979.08.09, Gulden, Gro 58/79 <Note:
Described (GG).> (O-F162199). (Cfr.)
ULVIK, Finse, Fetene. Plot no GG4. Rumiceto-Salicetum lapponae,
1979.08.12, Gulden, Gro 141/79 (O-F162200). (Cfr.)
ULVIK, Finse, Fetene, on sandy soil under Salix lapponum,
26 Aug. 2005, A. Aronsen & G. Gulden, Aronsen A23/05.
ULVIK, Finse, South side of Nordnut, under Salix sp., 27
Aug. 2005, G. Gulden, Aronsen A30/05.
Go to sect. Filipedes
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