Among fallen
leaves and on fallen, decaying branches in Fagus sylvatica
woods, more rarely on other hardwood, such as Alnus and Betula. Late summer to late autumn. Regular but not in great numbers where Fagus occurs.
Pileus 5-25(-38)
mm across, conical or campanulate to parabolical with a small papilla,
pruinose, glabrescent, shallowly sulcate, little translucent-striate,
dark red-brown at the centre, orange-brown to grey brown farther outwards, paler to grey or whitish towards
the margin, stained with yellow-red to orange-red spots.
Lamellae 15-25
reaching the stipe, ascending, narrowly adnate, white, stained
with yellow-red to orange-red spots. Stipe
50-95 x 1-2(-4) mm, hollow, equal, straight to somewhat curved, firm,
pruinose to minutely puberulous all over, more or less glabrescent,
often remaining pruinose at the apex, glabrous below, shiny,
pale yellow to orange yellow above, darker orange below,
bright orange to reddish at the base, rooting; exuding safran-red juice when
cut, the base densely covered with long, coarse, whitish
to orange-yellow fibrils. Odour
indistinctive
Basidia 25-37 x
8-10 µm, clavate, 4-spored, with sterigmata 5-7 µm long. Spores
8.2-11.5 x 5-7 µm, Q 1.4-1.8, Qav 1.6, pip-shaped, smooth, amyloid.
Cheilocystidia
13-32 x 7-14 µm, forming a sterile band, clavate,
covered with not very numerous, evenly spaced, simple, cylindrical,
straight to somewhat curved excrescences 1-8 x 0.9-2 µm, sometimes longer, irregularly inflated and branched. Pleurocystidia scarce, clavate, smooth or with few excrescences. Lamellar trama weakly dextrinoid. Hyphae
of the pileipellis 1-4 µm wide, covered with simple to
furcate or somewhat branched excrescences 1-6.5 x 1-2 µm. Hyphae
of the cortical layer of the stipe 1-3 µm wide, sparsely
covered with simple, cylindrical excrescences 1-5.5 x 0.5-1 µm, terminal
cells 3.5-7 µm wide, subcylindrical to clavate, diverticulate. Clamp connections present at all tissues.
Microphotos of cheilocystidia 1.
Microphotos of cheilocystidia 2.
Mycena crocata is the only species
in sect. Crocatae Maas Geest. It is very characteristic
with the yellow-red to orange-red stains and the reddish
juice in the stipe, in addition to the habitat.
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