Panaeolus bispora

Panaeolus bispora, also known as Copelandia bispora is a rare little brown mushroom that bruises blue and contains the hallucinogen psilocybin.

This mushroom is similar macroscopically to Panaeolus tropicalis, Panaeolus cambodginiensis and Panaeolus cyanescens, but can be differentiated by its two spored basidia.

Description
This is a little brown mushroom that grows on dung and has black spores. Can be found in Hawaii.