Panaeolus antillarum

Panaeolus antillarum is a common and widely distributed small to medium-sized gray mushroom which grows on dung. It is edible but not commonly eaten. Found from northern North America through Mexico into northern South America.

It is often mistaken for Panaeolus semiovatus var. phalaenarum or Panaeolus cyanescens, the latter species can be distinguished by the thinner, grayer cap and blue bruising.