Mycena corynephora

Corticolous species fruiting on the bark of various deciduous trees in small groups, with a campanulate to convex white pileus 2–5 mm across, adnate lamellae, and a cylindrical, watery-white stipe without a basal disc, its surface completely covered in whitish pruina.

Cuticle (pileipellis) formed by a layer of parallel hyphae 4–20 µm wide, topped by a large number of vesiculose to pyriform terminal cells measuring 20–50 µm long by 15–25 µm wide, with their surface completely covered in numerous excrescences 0.5–3 µm high.

Caulocystidia very abundant, large, cylindrical to clavate, measuring 40–190 µm long by 10–25 µm wide, completely covered over their entire surface with excrescences up to 6 µm high.

Cheilocystidia clavate, measuring 20–40 µm long by 8–25 µm wide, apically covered with numerous short excrescences up to 1.5 µm high.

Pleurocystidia absent.

Basidia clavate, 17–25 µm long by 9–13 µm wide, 4-spored.

Spores subglobose, ovoid to shortly ellipsoidal, smooth, hyaline, thin-walled, measuring 7–10 µm long by 6.5–8.5 µm wide, with an inconspicuous apiculus, amyloid in Melzer's reagent.

Herbarium material available: JTP2023/23.