Tricholoma atrosquamosum

Under broadleaf trees or conifers, with a preference for calcareous soils, with a convex to flattened pileus, 3 to 8 cm in diameter, fibrillose and scaly surface with dark greyish-brown squamules most abundant at the center, adnate white lamellae, whitish stipe with blackish scales, peppery odor, and sweet taste.

Cuticle filamentous, formed by parallel-arranged hyphae, 3 to 5 µm wide in the suprapellis with brownish intracellular pigment, and thicker hyphae below, 6 to 15 µm wide, all septate with simple septa (without clamp connections).

Without cystidia.

Lamellar trama regular or parallel.

Basidia cylindric-clavate, 25 to 35 µm long, 6 to 8 µm wide, with simple base, 4-spored.

Spores ellipsoid, smooth, hyaline, thin-walled, with a lateral apiculus at one end, 6 to 7.5 µm long, 3.5 to 5 µm wide, mostly containing a large oil droplet inside, inamyloid in Melzer's reagent.