Onnia tomentosa

Species associated with conifers, especially Picea (though collected under Pinus sylvestris in this study), with a flattened, centrally depressed pileus 4–10 cm across, yellowish-brown with a whitish margin, angular pores (2–4 per mm), and brownish to light brown context flesh.

Monomitic hyphal system; cuticular hyphae filamentous, thick-walled, 4–8 µm wide, containing pale yellow intracellular pigment, with abundant emergent terminal elements having rounded ends, septate with simple septa.

Hymenial setae present and abundant, thick-walled, brown, measuring 50–75 µm long by 7–12 µm wide, with an enlarged base.

Basidia clavate, 13–18 µm long by 5–7 µm wide, simple-based, 2- or 4-spored.

Spores ellipsoidal to oblong, smooth, hyaline, thin-walled, measuring 5–6 µm long by 3–4 µm wide, with an inconspicuous eccentric apiculus at one end, containing sparse oil droplets inside, inamyloid in Melzer's reagent.