Radulomyces molaris

On bark of branches still attached to the tree, or on decaying fallen branches of Quercus, with resupinate basidiomes forming isolated patches that tend to merge, ochre to greyish, with a hydnoid hymenium bearing spines 2 to 4 mm long, waxy in consistency when fresh and coriaceous when dry.

Hyphal system monomitic, formed by cylindrical, filamentous generative hyphae, hyaline or with faint brownish intracellular pigment, moderately thick-walled, 2 to 4 µm wide, septate with coarse, prominent clamp connections.

Cystidia absent.

Basidia cylindrical-clavate, 35 to 50 µm long, 8 to 12 µm wide, with basal clamp connections and four-spored.

Spores short-ellipsoidal to oblong, smooth, hyaline, thin-walled, 8.5 to 11 µm long, 6 to 7.5 µm wide, containing oil droplets of varying size inside, and inamyloid in Melzer's reagent.

Herbarium material available: JTP2490/25.