Arrhenia rustica

Suprapellis filamentous, formed by a layer of hyphae arranged in parallel, with prominent, distinct clamp connections.

Lamellar trama parallel, with likewise clamped hyphae.

Without differentiated cystidia.

Basidia cylindrical, slightly widened at the tip, 4-spored and clamped.

Spores ovoid to broadly ellipsoidal, thin-walled, with vacuolar content inside, inamyloid in Melzer's reagent.