Leucocoprinus brebissonii

About

Leucocoprinus brebissonii, commonly known as the gray-eyed dapperling, is a species of mushroom producing fungus in the family Agaricaceae. It is also known as the skullcap dapperling due to its distinctive pattern on the cap. This mushroom was only thought to be found in Europe but it has since been observed in the Pacific Northwest and may also be found in Asia.

Summary from Wikipedia