Bjerkandera adusta

Hyphal system monomitic, with only hyaline generative hyphae provided with prominent clamp connections.

Cuticle filamentous, with multiple bundles of emerging hyphae arranged in parallel with brown intracellular pigment.

Without observed cystidia.

Basidia clavate, small and 4-spored.

Spores small, subglobose to ellipsoidal, thin-walled, smooth and inamyloid in Melzer's reagent.