Mycena sect. Intermediae Kühner ex Maas Geest.

In the Northern hemisphere sect. Intermediae comprises the following five species: Mycena latifolia Peck (A.H.Sm.), M. font-queri Maire, M. haushoferi Robich, Miersch & Karasch, M. silvae-pristinae Veerkamp & Kuyper, and M. borealis A. H. Sm., of which the latter has only been collected in the USA and Canada. From Norway only M. latifolia is known.

According to Robich et al. (2005) the other species in the section differ from M. latifolia in having smooth to sparsely diverticulate hyphae of the pileipellis. Robich (2003: 424), however, showed that in M. font-queri the outermost hyphae of the pileipellis are distinctly diverticulate. This was also demonstrated by Moreno et al. (1995). Robich (2003: 429) stated that M. font-queri differs from M. latifolia by a much larger number of lamellae reaching the stipe, much larger spores, and the clavate cheilocystidia with small warts. M. silvae-pristinae and M. borealis have cheilo- and pleurocystidia apically covered with excrescences.

Robich, Miersch & Karasch (2005) provided a key to the section.

Key to the species of the Northern Hemisphere:

1. Pleurocystidia apically covered with cylindrical excrescences
2. M. silvae-pristinae
2. M. borealis
1. Pleurocystidia apically smooth
3. Spores shorter than 10 μm
4. Hyphae of the pileipellis smooth or with rare excrescences, caulocystidia diverticulate: M. haushoferi
4. Hyphae of the pileipellis diverticulate, caulocystidia lacking: M. latifolia
3. Spores longer than 10 μm: M. font-queri



© Arne Aronsen 2002-2015