When: 2019-10-16

Collection location: Lincoln Co., Maine, USA [Click for map]

Who: jtibbs

Specimen available

• Pileus: 1-4cm; margin translucent striate when moist, hygrophanous with a separable gelatinous pellicle, sometimes turning blue
• Stipe: 2-6cm; An annulus/ring zone often present, streaked with blue (or black) in mature specimens or soon after collection. Other regions of the stipe, especially the base, usually turn blue after handling.
• Microscopic: Spores dark purplish; I have not measured the spores or the cheilocystidia, pleurocystidia absent.
• Habitat: Mulched/wood-chipped area adjacent to a river, woodchips are softwood (probably white pine); occurring in patches with a max distance of ~200ft apart. Shade and slope is variable between patches.

The thin membranous partial veil/annulus isn’t always present in mature specimens, seems to depend on various environmental factors or maturity. Sometimes the veil is stuck to the cap margin or stuck to a neighbor’s cap.


separable gelatinous pellicle
after removing some of the top layer the veil fragments from fruiting bodies on the upper layer are stuck to top of caps in the next layer
Note the partially detached rings
This wasn’t the typical form but a nice example of the annulus.
Flash makes the blue look silvery
Annulus/ring zone under a dissecting scope

Proposed Names

38% (9)
Recognized by sight: blue annulus
Used references: Guzmán, G. The Genus Psilocybe: A Systematic Revision of the Known Species Including the History, Distribution and Chemistry of the Hallucinogenic Species. Beihefte zur Nova Hedwigia Heft 74. J. Cramer, Vaduz, Germany (1983)
Stamets P. (1996). Psilocybin Mushrooms of the World: An Identification Guide. Berkeley, California: Ten Speed Press.
Based on microscopic features: pleurocystidia absent
-25% (4)
Recognized by sight: dingy olivaceous, hygrophanous, striate with a nipple

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

= Observer’s choice
= Current consensus


Add Comment
By: Erlon Bailey (Herbert Baker)
2020-11-25 14:03:35 JST (+0900)

Yes. I have found P. caerulipes on softwood mulch. https://www.inaturalist.org/observations/5700751

By: Ryan Patrick (donjonson420)
2020-11-25 07:36:51 JST (+0900)

Has caerulipes been recorded on softwood? jtibbs reports it on softwood, likely white pine.

Not P. ovoideocystidiata….
By: Michael W (Michael Wallace)
2019-11-06 13:53:21 JST (+0900)

…. the cheilocystidia here are not a good match for P. ovoideocystidiata, the neck is too long and the shape is mostly lageniform with a long flexuous neck.
P. ovoideocystidiata has globose, pedunculate or subpedunculate cheilocystidia.

This looks more like P. stuntzii.

By: jtibbs
2019-11-06 12:18:07 JST (+0900)

This photo of the cheilocystidia is not good, I know. It is the best I can do for now with my scope at home. I will try to get some better photos and measurements on here soon. The cystidia are tiny, abundant, and they have shoulders with long neck-like projections.

Does P. ovoideocystidiata usually have a separable gelatinous pellicle?

Microscopic features
By: Alan Rockefeller (Alan Rockefeller)
2019-11-05 03:50:14 JST (+0900)

Are you able to post some photos of the cheilocystidia?