Arrhenia chlorocyanea

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.