Asterostroma laxum

Hyphal system monomitic, with only generative hyphae, very difficult to dissociate and without clamp connections.

Abundant asterosetae and asterohyphidia in the hymenium and subhymenium, thick-walled and brown under the microscope.

Large scattered gloeocystidia, protruding in many cases above the level of the basidia.

Basidia cylindrical to clavate, 4-spored.

Spores smooth, thin-walled, virtually spherical to ovoid, containing a large lipid droplet inside, amyloid in Melzer's reagent.