Phaeolus schweinitzii

Parasite and saprophyte on decaying stumps and root collars of conifers, especially pines, of substantial dimensions, with a pileus 10 to 30 cm across, reddish-brown with a yellowish margin, velvety/tomentose, concentrically zonate, and a hymenophore of yellow labyrinthine/daedaloid pores that bruise dark brown upon handling.

Hyphal system monomitic; hyphae cylindrical, containing brown intracellular pigment, 5 to 12 µm wide, thin- to moderately thick-walled, septate with simple septa (lacking clamp connections).

Hymenial cystidia (gloeocystidia) thin-walled, cylindrical, slightly sinuous, large, 70 to 130 µm long, 7 to 14 µm wide, containing granular inclusions, projecting beyond the basidia.

Basidia cylindrical-clavate, 20 to 28 µm long, 6 to 8.5 µm wide, simple-septate at the base, 4-spored.

Spores ellipsoidal, smooth, hyaline, thin-walled, 6.5 to 9 µm long, 3.5 to 5 µm wide, containing small guttules, inamyloid in Melzer's or IKI reagent.