| Panaeolus bisporus | |
|---|---|
 | |
Scientific classification | |
| 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 | |
| Panaeolus bisporus | |
|---|---|
| Mycological characteristics | |
 | Gills onhymenium |
 | Cap is convex |
 | Hymenium is adnexed |
 | Stipe is bare |
 | Spore print is black |
 | Ecology issaprotrophic |
 | Edibility ispsychoactive |
Panaeolus bisporus, also known asCopelandia bisporus is a rare and widely distributed little brown mushroom that bruises blue and contains the psychedelic compoundpsilocybin.
This mushroom is similar macroscopically toPanaeolus tropicalis,Panaeolus cambodginiensis andPanaeolus cyanescens, but can be differentiated using a microscope by its two spored basidia.
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This is alittle brown mushroom that grows on dung and has black spores. It has been found inHawaii,Southern California,North Africa,Spain andSwitzerland.
The cap is 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.The gills are adnexed or narrowly attachedtightly packed, mottled gray to jet black, white edges.The stem is white, fibrous, 65-120 mm long 2-3 mm thick, hollow, translucent gray, bruising heavily blue where bruised.It produces spores that are jet black, elliptical, 12-14 x 8-10 x 6-7.5 μm smooth and opaque, elongated with germ pore straight off the end.Microscopic features are 2spored 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.
Its habitat aresaprotrophic ongrasses.
