Suillus viscidus

A species typical of calcareous soils under larches (Larix), with a convex to flattened cap, 4 to 10 cm in diameter, viscid whitish to greyish-brown surface, brownish-grey pores that bruise upon handling, a cylindrical stipe, brownish-grey with an annular zone, with a faint odour and mild (insipid) taste.

Filamentous pileipellis, composed of cylindrical hyphae arranged more or less parallel, 3 to 6 µm wide, the uppermost ones separated by gelatinisation, septate and without clamp connections.

Cheilocystidia and pleurocystidia cylindrical to slightly clavate, 35 to 65 µm long, 6 to 10 µm wide, hyaline or with only faint ochraceous-brown intracellular pigment.

Basidia clavate, 25 to 35 µm long, 7 to 9 µm wide, with a simple base, 4-spored.

Spores cylindrical-ellipsoidal to fusiform, smooth, thick-walled, pale yellowish-brown under the microscope, 9.5 to 13 µm long, 4 to 5 µm wide, with an indistinct eccentric apiculus at one end, containing oil or lipid droplets inside.