Ganoderma carnosum

A Ganoderma strictly confined to conifer wood, especially fir, collected here on an Abies alba trunk.

Trimitic hyphal system, with very thick-walled skeletal hyphae predominant in the context (5 to 7 µm wide, sparingly branched, aseptate), thin-walled clamped generative hyphae (3 to 5.5 µm wide), and thick-walled richly branched binding hyphae.

A distinctive laccate crust coats the entire pileus surface.

Cystidia and other sterile hymenial elements absent.

Basidia cylindrical, up to 25 µm long, with basal clamp connections, 4-spored.

Spores ellipsoidal, with a tapered apex, double-walled, yellowish-brown under the microscope, punctate with darker surface dots, with a large internal lipid guttule, inamyloid in Melzer's reagent.

Herbarium material available: JTP2565/25.