Mycena renati
Cap: 10-32mm, campanulate, campanulate-expanded, finally convex, pruinose, glabrescent, shallowly sulcate, translucent-striate, dark reddish brown at first, becoming paler reddish brown to pinkish brown or pink, darker towards the centre. Gills: 16-26 reaching the stem, ascending, adnate with a short decurrent tooth, broad, intervenose with age; colour white, whitish, gray; concolorous edge which tends to turn reddish or violet-brown. Flesh: similar colour to cap with a brown hue. Stem: 1-2.5 mm x 15-65 mm, hollow, straight to curved, equal, terete, pruinose, glabrescent, uniformly bright yellow, turning brown from the base with age; the base covered with fine white fibrils. Smell indistinct to weakly nitrous. Spores: (4.5) 5-7 x (8) 9-12 (13) µm, Q = 1.4-1.8, Qav = 1.6, fairly broadly ellipsoid or pip-shaped, amyloid. Basidia: 25-34 x 8.5-10, clavate 4- spored. Cheilocystidia: 7-16 x 24-63 μm, fusiform, rarely lageniform (neck narrower than half the width of cell body) or clavate. Hyphae of the pileipellis: 2.5-12 µm wide, smooth or covered with coarse, rounded, mostly inflated excrescences 8-22.5 x 5.5-13.5 µm. Hyphae of the cortical layer of the stipe 2.5-3.5 µm wide, smooth or covered with scattered rounded warts, clamped, the terminal cells coarsely diverticulate. Clamp connections present in all tissues.
Map of known distribution in Great Britain and Ireland.
Description adapted from: A. Aronsen A Key to the Mycena of Norway 2016 and G. Robich Mycena d'Europa Volume: 1 2003
The combination of a pinkish cap and yellow stem is not found in any other British Mycena species.
In GB&I it has only been recorded from sites in England (VC66 Durham, VC64 Mid-west Yorkshire, VC62 North-east Yorkshire, VC54 North Lincolnshire, VC 8 South Wiltshire and VC13 West Sussex).
Found in small groups or fasciculate (many fruitbodies emerging from the same place) on the decaying wood of deciduous trees, including: Fagus (beech) Quercus (oak), Fraxinus (ash), Alnus (alder) and Corylus (hazel).