Verdigris navel

''Arrhenia chlorocyanea'', commonly known as the verdigris navel, is a species of agaric fungus in the family Hygrophoraceae. Originally named as a species of ''Agaricus'' in 1885, and later classified as a member of ''Omphalina'', the species was transferred to the genus ''Arrhenia'' in 2002. It is found in Europe and North America.