Arrhenia chlorocyanea

Division:Basidiomycota

Class:Agaricomycetes

Order:Agaricales

Family:Hygrophoraceae

Arrhenia chlorocyanea
Scientific classification
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Hygrophoraceae
Genus:	Arrhenia
Species:	A. chlorocyanea
Binomial name
Arrhenia chlorocyanea (Pat.) Redhead, Lutzoni, Moncalvo & Vilgalys (2002)
Synonyms[1]
Agaricus umbellifer var. viridis Hornem. (1819) Agaricus chlorocyaneus Pat. (1885) Omphalina umbellifera var. viridis (Hornem.) Quél. (1886) Omphalia chlorocyanea (Pat.) Sacc. (1887) Omphalia umbellifera var. viridis (Hornem.) Sacc. (1887) Omphalia viridis (Hornem.) J.E.Lange (1930) Omphalia umbellifera f. viridis (Hornem.) Cejp (1936) Omphalina chlorocyanea (Pat.) Singer (1952) Omphalina viridis (Hornem.) Kuyper (1984)[2]

Arrhenia chlorocyanea, commonly known as the verdigris navel,^[3] is a species of agaric fungus in the family Hygrophoraceae. Originally named as a species of Agaricus in 1885,^[4] and later classified as a member of Omphalina, the species was transferred to the genus Arrhenia in 2002.^[5]

The blue mushroom's caps are under 2 centimetres (3⁄4 in) wide and the stems are 1–4 cm (3⁄8–1+5⁄8 in) tall. The spore print is white.^[6] Entoloma species such as E. incarnatofuscescens may appear somewhat similar, but have a pink spore print.^[6]

It can be found in association with mosses in Europe and North America.^[6][5]