Calonarius atrovirens

Suprapellis hyphae filamentous, heavily encrusted with dark greenish-brown intracellular pigment, strongly separated from each other by gelification and clamped.

Lamellar edge without elements differentiated from basidia or basidioles.

Basidia clavate and 4-spored.

Spores yellowish under the microscope, amygdaliform (almond-shaped), with their surface carpeted with darker warts, and with a prominent lateral apiculus.