Mycena capillaris (Schumach.) P. Kumm.

Führ. Pilzk. (Zwickau): 108 (1871)

© A. Aronsen
VESTFOLD, Nøtterøy, Brattås 25 Oct. 2008

Gregarious on fallen, decaying leaves of Fagus. Occuring late in the autumn. Regular in Vestfold, and also recorded in other counties. See The Norwegian Mycological Database.

Pileus up to 3 mm across, hemispherical, parabolical, conical to convex, often slightly depressed centrally, pruinose, glabrescent, sulcate, translucent-striate, whitish grey to pale grey or white, sometimes with darker centre. Lamellae 6 - 10 reaching the stipe, ascending, very narrow to fairly broad, the edge at first concave then convex, narrowly adnate to adnate, sometimes making a pseudocollarium, whitish grey to white, the edge white. Stipe 20-40 mm long, filiform, flexuous, cartilaginous (?), pruinose, glabrescent except for the usually puberulous base, shiny, when young entirely blackish or dark grey or blackish or dark grey at the apex, becoming grey to grey-brown, finally watery white, the base somewhat bulbous or not, attached to the substratum by a patch of radiating, dark brown to blackish fibrils, not easily seen, and often seemingly insititious. Odour none.

Basidia 17-21 x 6-8.5 μm, clavate, 2-spored and clampless or 4-spored and clamped. Spores 8.5-13.5 x 2.8-4.5 μm, elongated, cylindrical (more cylindrical in 2-spored form), amyloid. Cheilocystidia 14-26 x 7-15 μm, forming a sterile band, clavate to obpyriform, clampless (2-spored form) or clamped (4-spored form), covered with evenly spaced, cylindrical, straight, simple excrescences or warts 2-4.5 x 0.5-1 μm. Pleurocystidia absent. Lamellar trama dextrinoid. Hyphae of the pileipellis 4-15 μm wide, densely covered with warts or short cylindrical excrescences. Hyphae of the cortical layer of the stipe up to 3.5 μm wide, densely covered with short cylindrical excrescences 1-2 μm long. Caulocystidia at the base of the stipe 5-15 μm wide, clavate, obpyriform or spheropedunculate, densely covered with short cylindrical excrescences.

Mycena capillaris is a member of sect. Polyadelphia Singer ex Maas Geest. It is characterized by the small size, the white to greyish pileus, the distant lamellae, the dark stipe (at least in younger specimens), the cheilocystidia and hyphae of the pileipellis covered with warts or short cylindrical excrescences, and the occurence on Fagus leaves. It is close to M. polyadelpha (Lasch) Kühner, but differs in several features as colour of pileus and stipe, the attachment of the lamellae, and the spore width.

According to Kühner (1938: 250) the base of the stipe is "naissant d'une petite tache brune ou noire, à peine nette à l'œl nu, formée de fibrilles noires rayonnantes, étroitement apprimées sur le support". Maas Geesteranus (1986: 163) described the stipe as "arising from a small whorl of radiating, very fine, dark brown mycelial hyphae (sometimes subepidermal and not easily discernible)". In my experience these fibrils are not easy to see, and very often they seem to be absent. Consequently this is quite useless as an identification character.

Go to key to sect. Polyadelphia.

Further photos on the web:

Pilze Pilze Pilze

Pilze Pilze Pilze 2

Bio Images 1

Bio Images 2

Bio Images 3

Grzyby Polskie

Jean-Luis Cheype

Ole Bidstrup

Huby 2006

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© Arne Aronsen 2002-2015