Mycena section Fuliginellae (A.H. Smith ex Sing.)
Maas G. comprises only three species in Europe in addition
to the American species M. austinii (Peck) Kühn.,
M. egregia Maas G., M. mackinawensis A.H.
Smith, and M. tenax A.H. Smith.
The European species are M.
vulgaris (Pers.: Fr.) Kummer, M. geesterani
Heykoop, Esteve-Raventós & Moreno, and M.
agrestis Aronsen & Maas G.
Since there are only seven species in the section it seems
natural to provide a key that takes all the species into
account.
| 1. Lamellae ascending, with convex edge. |
| |
2. Cheilocystidia generally slender, 4.5-10
µm broad (except where much branched excrescences
seem to form a head) Pleurocystidia with strikingly
acute apex. Hyphae of the pileipellis smooth or with
few excrescences: M. tenax |
| |
2. Cheilocystidia stubby, 9-18 µm
broad. Pleurocystidia apically not particularly acute,
more often broadly rounded. Hyphae of the pileipellis
covered with scattered to very numerous excrescences:
M. egregia |
| 1. Lamellae arcuate, with concave edge. |
| |
3. Pleurocystidia present. Cheilocystidia
clavate. |
| |
|
4. Pileus white. Terminal cells of the
hyphae of the cortical layer of the stipe in part with
long and very much branched excrescences: M.
austinii |
| |
|
4. Pileus grey in various shades. Terminal
cells of the hyphae of the cortical layer of the stipe
with short and simple to little branched excrescences:
M. mackinawensis |
| |
3. Pleurocystidia absent. |
| |
|
5. Cheilocystidia clavate, with rather
few, very coarse excrescences. Not associated with conifers:
M. agrestis |
| |
|
5. Cheilocystidia not clavate, apically
densely branched, with fine, cylindrical excrescences.
Associated with conifers. |
| |
|
|
6. Spores 6.7-8.3 x 3.6-4.9 µm:
M. vulgaris |
| |
|
|
6. Spores 4-5 x 2-2.5 µm, strongly amyloid:
M. geesterani |
|
