Sistotrema confluens

An uncommon species associated with conifers, with stipitate basidiomes; pileus applanate to infundibuliform with an undulate margin, 1 to 2.5 cm across, white to slightly ochre, slightly velvety surface; hymenium with white decurrent spines; stipe whitish to ochre, cylindrical, slightly enlarged at the base.

Cuticle formed by cylindrical, hyaline, slightly thick-walled hyphae, interwoven, 2 to 5 µm wide; subhymenial hyphae containing minute oil droplets; all septate with clamp connections difficult to observe.

Terminal hyphae at the spine tips arranged parallel, cylindrical, 4 to 5 µm wide with rounded apices.

Cystidia and other sterile hymenial elements absent.

Basidia subcylindrical to urniform, 15 to 25 µm long, 3 to 5 µm wide, with basal clamp connections, bearing 6 to 8 sterigmata.

Spores not obtained; according to literature ellipsoidal to oblong, smooth, hyaline, thin-walled, 4 to 5.5 µm long, 2 to 2.5 µm wide, containing oil droplets of varying size inside, and inamyloid in Melzer's reagent.

Herbarium material available: JTP2751/25.