Name: Psilocybe samuiensis Guzmán, Bandala & J.W. Allen
Most Confident Observations:
Copyright © 1991 John W. Allen
Copyright © 1991 John W. Allen
Copyright © 1991 John W. Allen
Version: 4
Previous Version 

First person to use this name on MO: John W. Allen
Editors: Erlon Bailey, Excited delirium [EXD]▼

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Rank: Species

Status: Accepted

Name: Psilocybe samuiensis

ICN Identifier: missing

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Author: Guzmán, Bandala & J.W. Allen

Citation: Mycotaxon 46: 156 (1993)


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Agaricales

Family: Hymenogastraceae

Genus: Psilocybe

Notes on Taxonomy: [Edit]

Typification Details: Holotype XAL, Allen, 8 Aug. 1991

Host-Substratum/Locality: On sandy-clay soils in rice paddies and meadows: Thailand


Brief Description: [See More | Edit]

This species, known only from Thailand, grows on rich soil in meadows (Guzmán et al. 1993). It presents basidiomata like P. mexicana R. Heim, with pileus 7-15 mm diam., lamellae adnexed and stipe 40-65 × 1.5-2 mm, without annulus.

Basidiospores 10-13 × 6-8 µm, rhomboid to subrhomboid in faceview, thick-walled. Pleurocystidia 16-20 × 5-6.5 µm, scattered, sublageniform, hyaline and cheilocystidia 18-28(-30) x (5-)5.5-7(-8) µm, sublageniform, sometimes branched.

Basidiospore morphology supports P. samuiensis within sect. Mexicanae Guzmán. Molecular analyses by Borovička et al. (2011) that show this species as separate from sects. Cyanescens and Semilanceatae support sect. Mexicanae as independent.


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