Observation 68518: Psilocybe guilartensis Guzmán

When: 2011-05-27

Collection location: Las Casas de la Selva, Patillas, Puerto Rico, USA [Click for map]

Who: patty (patty)

No specimen available

Notes:
Solitary, growing from ground (clay) on path. Cap 3cm, broadly convex, center slightly depressed with small umbo, cinnamon center, darker almost to dark brown towards margin, smooth, dry, slightly striate. Context thin, beige, bruising blue/green. Gills free, tan to dark plum, deep (4-5mm), close, hymenium easily peeling from cap. Stipe 6cm long, 2mm wide, equal, stuffed, fibrillose. Spore print dark purple brown, spores 5.5-6.5µm x 5-5.5µm, thick walled.

Species Lists

Images

149210
Copyright © 2011 David Croad
149211
149212
1000x
149213
1000x, 1µm scale

Proposed Names

59% (3)
Used references: Guzman et al. New species of Psilocybe in the Caribbean, with an emendation of P. guilartensis http://www.treesearch.fs.fed.us/pubs/25900
10% (2)
Used references: Used references: Guzman et al. New species of Psilocybe in the Caribbean, with an emendation of P. guilartensis http://www.treesearch.fs.fed.us/pubs/25900
66% (4)
Eye3 Eyes3
Recognized by sight: Dark brown cap and stem
Based on microscopic features: Spores subrhomboid

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
nice guilartensis
By: Sovereign
2011-08-10 02:40:40 CDT (-0500)

These are definitely P. guilartensis. The yellowish mycelium on the base is one of the defining characteristics of this species.

P. caribaea more resembles P. caerulescens than it does P. guilartensis.

Your photos match up well with my 2008 collection.

these forest psilocybes
By: patty (patty)
2011-06-02 09:03:22 CDT (-0500)

all seem to have annoyingly similar characteristics, even the microscopic ones. Psilocybe caribaea and Psilocybe guilartensis both have subrhomboid spores and a dark cap. P. caribaea tends to have a larger cap (35-60mm), as compared to P. guilartensis (15-20)… my collection had a cap of 30mm, so I leaned towards the larger of the two.

However, looking more, P. guilartensis does have a more similar habitat (on clay, pathsides, landslide, disturbed areas), and is more common. One of the defining charcteristics of P. guilartensis is having two distinct types of pleuro- and cheilocystidia… Which I have not looked at.

next time
By: patty (patty)
2011-06-01 15:25:02 CDT (-0500)

I’ll pay more attention… I almost didn’t make this collection (hence the bad photos), I’m a little LBM-phobic.

Nice find!
By: Eric Smith (esmith)
2011-06-01 15:07:45 CDT (-0500)

I hope they come back so we can see more pics.

Created: 2011-06-01 15:01:10 CDT (-0500)
Last modified: 2018-01-15 21:10:53 CST (-0600)
Viewed: 323 times, last viewed: 2018-07-16 14:00:52 CDT (-0500)
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