Key to the European members of section Fuliginellae

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



© Arne Aronsen 2002-2015