Agaricus urinascens (the macro mushroom)[2] is a species of fungus in the family Agaricaceae.

[3] The mushroom grows up to 30 centimetres (12 in) wide and 12 cm (4+3⁄4 in) tall.

The cap is whitish, domed then becoming convex in age.

The gills are whitish, then darken to pink or brownish with age.

[4] It can be found in pastures of Europe from June to September.