iNaturalist Research Grade Observations
Catalog #: 4676093
Taxon: Psilocybe caerulescens Murrill
Family: Hymenogastraceae
Collector: alan_rockefeller      
Date: 2008-09-14
Verbatim Date: 2008-09-14
Locality: United States, South Carolina, Seneca, South Carolina, USA
34.6767  -82.9616 +-4976m.
Georeference Remarks: GEODETIC_DATUM_ASSUMED_WGS84
Description: Original observation #4676093 (iNaturalist)
Occurrence Remarks:

Found by SEmushroomHunter, ID’d by Workman, who says "Spores: subrhomboid 6.6-8.2 microns
Cheilocystidia: 16.4-22.3 microns
Pleurocystidia: absent

Psilocybe weilii has smaller spores and abundant pleurocystidia. This specimen keys out solidly as Psilocybe caerulescens which is not unknown in the SE United States. P. caerulescens was first described by Murrill from Alabama in 1923 and as far as I can tell it hasn’t been reported from anywhere in the US since. This sample could be a remnant of that first described collection. Samples should be sent to a herbarium to officially document the find.
The only reason this sample was determined to be different from P. weilii is because of the microscopic examination. The two species are macroscopically virtually indistinguishable. I suspect that many of the “weilii” collections are actually unrecognized caerulescens or a mix between the two species. Further microscopic examinations of various collections is needed."

Specimen Images
Rights Holder: © held by the observer (listed as 'Collector') at, with some rights reserved (CC BY-SA)
Record Id: 6adb70a7-ea99-4b63-9cc9-d87bb2aa1b1d
Occurrence ID (GUID):
For additional information on this occurrence, please contact: Ken-ichi Ueda (
No comments have been submitted
New Comment
Login to leave a comment.