Panaeolus bisporus
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Basidiomycota
Class:	Agaricomycetes
Order:	Agaricales
Family:	Bolbitiaceae
Genus:	Panaeolus
Species:	P. bisporus
Binomial name
Panaeolus bisporus (Malencon and Bertault) Singer and Weeks
Synonyms
Panaeolus bispora Copelandia bisporus Copelandia bispora

Panaeolus bisporus Mycological characteristics
	Gills on hymenium
	Cap is convex
	Hymenium is adnexed
	Stipe is bare
	Spore print is black
	Ecology is saprotrophic
	Edibility is psychoactive

Panaeolus bisporus, also known as Copelandia bisporus is a rare and widely distributed 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 using a microscope by its two spored basidia.

Description

This is a little brown mushroom that grows on dung and has black spores. It has been found in Hawaii, Southern California, North Africa, Spain and Switzerland.

Cap: 15-30 mm tan to gray fading to black sometimes when covered with spores and with a defined ring zone somewhat globe shaped or bell shaped to convex, hardly expanding, margin often torn and pedaled, smooth not viscid, and slightly wrinkled and pitted with age. Dark grey-brown drying whitish.

Gills: adnexed or narrowly attachedtightly packed, mottled gray to jet black, white edges

Stem: white, fibrous, 65-120 mm long 2-3 mm thick, hollow, translucent gray, bruising heavily blue where bruised

Spores: jet black, elliptical, 12-14 x 8-10 x 6-7.5 µm smooth and opaque, elongated with germ pore straight off the end

Habitat: saprotrophic on grasses

Microscopic features: 2 spored basidia 18 - 23 × 8-10 µm, cheilocystidia are bottle shaped and clear 20-30 µm, metuloids with yellow brown walls 40-55 × 12-15 µm some with excreted crystals