Panaeolus semiovatus var. semiovatus

'Panaeolus semiovatus var. semiovatus', also known as Panaeolus semiovatus and Anellaria separata is medium sized buff colored mushroom that grows on horse dung. While some guides list this species as edible, a few people experience gastric upset after consumption.

Description
This is a buff colored mushroom that grows in horse dung and has black spores. The cap is up to 8 cm across, buff to white, parabolic to nearly convex in age. The flesh is which and white. The stem is 15 cm by 20 mm, solid and smooth, with an annulus. The gills are adnexed and brown to black.

This mushroom is widely distributed and grows in many temperate regions of the world.