Petticoat Mottlegill

''Panaeolus papilionaceus'', also known as ''Agaricus calosus'', ''Panaeolus campanulatus'', ''Panaeolus retirugis'', and ''Panaeolus sphinctrinus'', and commonly known as Petticoat mottlegill, is a very common and widely distributed little brown mushroom that feeds on dung.