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. 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. Entoloma species such as E. incarnatofuscescens may appear somewhat similar, but have a pink spore print. It can be found in moss in Europe and North America....read more on Wikipedia.