Hairy Long Stem Marasmius

The Hairy Long Stem Marasmius (Rhizomarasmius pyrrhocephalus) is a mushroom in the family Physalacriaceae (Agaricomycetes, Agaricales) formerly known as Marasmius pyrrhocephalus but transfererd to the new genus Rhizomarasmius erected by R.H. Petersen (2000) of which it is the type species.