First person to use this name on MO: Michael Wood
Name: Hypholoma popperianum
Author: (Singer) Guzmán
Deprecated Synonyms: Naematoloma popperianum Singer
does a single, poorly preserved, probably misidentified fruit body constitute sufficient evidence to describe a new species?
This species is only known from a single collection, by Singer from an unknown location in San Francisco prior to 1973. He claims that he observed blue staining on this specimen, and this was the basis for it being frequently mentioned as a psilocybin-containing species.
While I was at SFSU, I had the opportunity to carry out a type study on the collection, which consists of a single cap and some stipe material. (That is the only collection of this species ever made.) The material was in a very poor state of preservation, but it appeared to either Leratiomyces ceres or perhaps a Pholiota (chrysocystidia were abundant). My guess is that the “blue staining” observed may have been some sort of blackening reaction of the pileus that was misinterpreted. I was not able to nail down an identification of it due to the state of preservation of the material (also, I never tried to get DNA for sequencing), but in all likelihood, this is simply a more commonly occurring Leratiomyces or Pholiota that was misidentified as being distinct and blue-staining.
Created: 2007-12-23 16:41:26 EST (-0500) by Michael Wood (mykoweb)
Last modified: 2017-07-24 21:16:30 EDT (-0400) by Michael Wood (mykoweb)
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