Observation 60410: Psilocybe “franciscana”

When: 2010-12-03

Collection location: Oakland, California, USA [Click for map]

Who: Peter G Werner (pgwerner)

Specimen available

This collection has a very unusually conic to campanulate to umbonate pileus shape for this species.

[admin – Tue Feb 08 12:35:01 +0000 2011]: Changed location name from ‘Oakland, CA’ to ‘Oakland, California, USA

Proposed Names

83% (1)
Eye3 Eyes3
Based on microscopic features: Characteristic large ellipsoid spores and ventricose-rostrate, lageniform, and utriform cheilocystidia of P. cyanescesns group. Of the two local species that share this micromorphology, the macroscopic appearance is closest to P. “franciscans”.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Before anyone suggests….
By: Peter G Werner (pgwerner)
2010-12-06 23:16:28 PST (-0800)

No, it isn’t Psilocybe ovoideocystidiata. The microscopic characters are consistent with the P. cyanescens group and not at all with P. ovoideocystidiata. (I’ll add some micrographs in the next few weeks, hopefully.) Also, the annulus is cortinate, not membranous, even in young fruiting bodies.

However, this is clearly an unusual collection, with a pileus shape that is very unusual for this species. I will note that the P. cyanescens group of species are largely separated by pileus shape, but I would be very reluctant to call something a new species based merely on one collection.

Created: 2010-12-06 23:01:55 PST (-0800)
Last modified: 2011-02-08 04:35:01 PST (-0800)
Viewed: 359 times, last viewed: 2018-02-18 19:48:48 PST (-0800)
Show Log