Mycetinis opacus

Mycetinis opacus is a species of agaric fungus first described in 1849 by Miles Joseph Berkeley and Moses Ashley Curtis as Marasmius opacus.^[2] Andrew Wilson and Dennis Desjardin transferred it to Mycetinis in 2005.^[3]

Mycetinis opacus
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Omphalotaceae
Genus:	Mycetinis
Species:	M. opacus
Binomial name
Mycetinis opacus (Berk. & M.A.Curtis) A.W.Wilson and Desjardin (2005)
Synonyms[1]
Marasmius opacus Berk. & M.A.Curtis (1849) Chamaeceras opacus (Berk. & M.A.Curtis) Kuntze (1898) Marasmiellus opacus (Berk. & M.A.Curtis) Singer (1951) Gymnopus opacus (Berk. & M.A.Curtis) J.L.Mata & R.H.Petersen (2004)

The cap reaches only to about 2 centimetres (3⁄4 in) in diameter.^[4] The stem is up to 5 cm (2 in) long and the spore print is white.^[5] The species has conspicuous pale mycelial cords and unlike some other members of its genus, it does not smell of garlic.^[4]

It is found in eastern North America (May–September)^[5] and rarely in Japan, growing especially on dead Rhododendron material, but also on debris of oak, pine, and eastern hemlock.^[4]