Entoloma serrulatum

Cutis composed of very broad parallel hyphae (up to 17 µm wide) with abundant bluish-brown intracellular pigment, very broad pigmented emerging terminal elements, with simple septa without clamp connections.

Cheilocystidia abundant, rendering the lamellar edge practically sterile, cylindrical to fusiform, up to 100 µm long, with rich grayish-blue intracellular pigment responsible for the typical dark gill edge characterizing the species.

Basidia clavate, up to 32 µm long, without basal clamp connections, 4-spored.

Spores angular, large, 5- to 7-angled, with a prominent lateral apiculus at one end and one or several lipid guttules.