Tricholoma fracticum

A species typical of pine woods, preferably under Pinus sylvestris on calcareous soils, with a convex to flattened pileus, 5 to 14 cm in diameter, smooth dark reddish-brown surface, adnate to emarginate cream-colored lamellae, cylindrical stipe with an annular zone, farinaceous odor, and bitter taste.

Cuticle filamentous, composed of cylindrical hyphae arranged more or less parallel to irregularly interwoven, 3 to 5 µm wide, upper layer hyphae separated by gelatinization, with abundant brown pigment inside, all septate with simple septa (without clamp connections).

Without cystidia.

Lamellar trama regular or parallel.

Basidia clavate, 35 to 45 µm long, 7 to 8 µm wide, with simple base (not clamped), 4-spored.

Spores subglobose to ovoid, smooth, hyaline, thin-walled, with a prominent eccentric apiculus at one end, 5.5 to 6.5 µm long, 4.5 to 5.5 µm wide, containing a large oil droplet inside, inamyloid in Melzer's reagent.