Mycena flavescens

Among moss on plant litter of Fagus or Picea, with a convex pileus bearing an obtuse umbo, 1–1.5 cm across, greyish-brown, darker at the centre, with a whitish margin, a cylindrical, hollow, glabrous stipe of brownish-grey colour with a whitish apex, and an odour of raw potato.

Cuticle (pileipellis) with a superficial layer of parallel hyphae 5–10 µm wide, with abundant short wart-like excrescences, underlain by a layer of broader hyphae 12–22 µm wide, septate and clamped.

Cheilocystidia and pleurocystidia subglobose, pyriform, vesiculose to clavate, measuring 25–65 µm long by 10–25 µm wide, covered with short cylindrical excrescences up to 2.5 µm long by 0.5–1 µm wide.

Basidia clavate, 18–25 µm long by 7–9 µm wide, with basal clamps, 4-spored.

Spores ellipsoidal, smooth, hyaline, thin-walled, measuring 8–10 µm long by 4–5 µm wide, with a slightly eccentric apiculus at one end, faint granular contents inside, amyloid in Melzer's reagent.