Entoloma undatum

An Entoloma with omphalinoid habit.

Pileipellis formed by parallel hyphae with ochraceous brown intracellular pigment and fine encrustations, with rounded emerging terminal cells up to 17 µm wide, and with clamped septa.

Lamellar edge without differentiated elements from basidia or basidioles (cheilocystidia absent).

Basidia cylindric-clavate, up to 50 µm long, partly with basal clamp connections, 4-spored.

Spores angular, with 6 to 8 slightly rounded, indistinct angles, an eccentric apiculus at one end and a large internal oil droplet.