Marasmius hudsonii

A minute fungus exclusively growing on decaying holly leaves (Ilex aquifolium), with a hemispherical to convex pileus 2–6 mm across, cream-coloured with pinkish hues, ornamented with erect reddish-brown hairs (setae), scarce, thick and distant lamellae, and a reddish-brown stipe with a whitish apex.

Hymeniform cuticle (pileipellis), formed by clavate to pyriform hyphae measuring 20–35 µm long by 12–15 µm wide, covered with numerous finger-like projections (digitations), with abundant fusiform to slightly capitate dermatocystidia measuring 50–70 µm long by 6–8 µm wide.

Cuticular hairs (setae) up to 0.7 mm long (700 µm), brown, thick-walled, with pointed tips.

Cheilocystidia and pleurocystidia fusiform, measuring 40–60 µm long by 7–12 µm wide.

Basidia cylindrical to clavate, 30–35 µm long by 7–10 µm wide, with basal clamps, 4-spored.

Herbarium material available: JTP1978/23.