Entoloma clandestinum

Pileipellis with filamentous hyphae arranged more or less parallel, with clamped septa and some broad, cylindrical, hyaline terminal hair-like hyphae.

Stipitipellis without observed caulocystidia, with clamped hyphae.

Lamellar edge homomorphic without differentiated elements from basidia or basidioles.

Basidia clavate, with basal clamp connections, 2- or 4-spored.

Spores large, with undulate margins (without sharply defined angles), a very prominent apiculus and granular content.

The original spore measurements, given their large size, deviated from standard literature; expert consultation suggested that these large spores derived from 2- and 1-spored basidia, while spores among 4-spored basidia were more isodiametric. Measuring 21 mature spores yielded 7–10.8 (11.1) × 5.7–7.8 (8.7) µm, fully matching the species concept.