Clavulina rugosa

Monomitic hyphal system, with tramal hyphae hyaline, smooth, moderately thick-walled, arranged more or less parallel and provided with prominent clamp connections.

Basidia cylindrical to only slightly widened at the apex, with granular content, 2-spored.

Spores ellipsoidal, smooth, hyaline, moderately thick-walled, with an inconspicuous apiculus at one end and with a large oil droplet occupying almost the entire spore.