Trametes trogii

On dead wood of broadleaf trees, preferring Populus or Salix, with sessile, effused-reflexed, rarely resupinate basidiocarps, semicircular pilei up to 10 cm across, with a yellowish-ochre hirsute surface covered with coarse, disorderly hairs, without concentric zones, 1 to 2 angular to labyrinthine pores per mm, yellowish-ochre, and a coriaceous context of the same color.

Trimitic hyphal system, with thick-walled skeletal hyphae, hyaline, aseptate, 4 to 6 µm wide; thin-walled generative hyphae, hyaline, 2 to 4 µm wide, sparsely branched, septate and with clamp connections; and thick-walled binding hyphae, hyaline, branched, tortuous, 2 to 3.5 µm wide.

Without cystidia or other sterile elements in the hymenium.

Basidia clavate, 15 to 25 µm long, 6 to 8 µm wide, with basal clamp connections, 4-spored.

Spores cylindrical with one side flatter, slightly allantoid, smooth, hyaline, thin-walled, 9 to 12 µm long, 3.5 to 4 µm wide, with an eccentric apiculus at one end, containing granular oil contents inside, inamyloid in Melzer's reagent.