Hebeloma mesophaeum

A species with a bicolored cap, darker in the center with a whitish margin, and a bitter taste.

Pileipellis with a superficial layer of hyaline hyphae, only 1.5-4 µm wide, widely separated by gelification; beneath these lie much broader, cylindrical hyphae with short septa and abundant yellowish-brown intracellular pigment inside.

Cheilocystidia cylindrical to swollen at the base (lageniform), 40-60 µm long and 6-10 µm wide.

Basidia clavate, 30-38 µm long and 8-10 µm wide, with basal clamps, 4-spored.

Spores ellipsoidal to citriform, thick-walled and slightly verruculose, yellowish-brown under the microscope, with darker warts, an eccentric apiculus at one end, indextrinoid in Melzer's reagent.