Observation 222120: Hypholoma (Fr.) P. Kumm.

When: 2015-11-07

Collection location: Ricketts Glen State Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

One cap appears to show bluing.

I believe this species has been incorrectly called Psilocybe caerulipes. The spores are too large for caerulipes (11-15 × 6.5-7.5), and the fruit bodies larger and more robust. Also the season is different. Caerulipes is a summer mushroom. My observations of these have been in mid-fall.

I think the micros show cystidia… long thin projections from smash-mounted gill material (in Congo red).

Same exact location as obs 187220 and obs 185988.



Proposed Names

33% (3)
Recognized by sight
33% (3)
Recognized by sight
Based on microscopic features: Are there chrysocystidia present?
2% (2)
Based on microscopic features: Are there cylindrical cheilocystidia?

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Mushroom seasons…
By: Dave W (Dave W)
2015-11-12 04:33:20 GMT (+0000)

relevant to the PNW and Pennsylvania do not correlate very well. As for the autumn ovoideocystidiata observation in Ohio… I haven’t seen this. I’d have more confidence in this if it appeared here on MO where such things are subjected to peer review.

First photo here (this obs), middle mushroom (with no stipe showing), in closeup areas of bluing may be observed along the margin. Dark ground color of cap kinda masks the effect.

Once again, the spores observed in this collection do not look like ovoideocystidiata spores.

Ovoids do grow in fall
By: PNWShroomer
2015-11-12 03:48:36 GMT (+0000)

Ovoids do grow in the fall. just about 2 weeks ago they were reported from Ohio and around Seattle and pics were provided and posted on facebook. Saw the same thing last year.

Not sure if the cystidia…
By: Dave W (Dave W)
2015-11-09 19:01:03 GMT (+0000)

seen in the photos are cheilo- or pleuro-. Observed as a result of a smash mount, so material gets kinda mixed beneath the slip… difficult to keep track of the gill edge. Cystidia appear to be cylindrical to slightly thickened below.

Aside from Leratiomyces squamosus var thraustus, I am aware of no other species of this genus that occurs here in PA. I doubt these represent L. squamosus var. thraustus. I see this species often, and it does not look like these. Three collections taken form the same location (square yard), two last year and this one all look the same, not like L. th var. sq.

Thanks for the info, Sporulator.
By: Dave W (Dave W)
2015-11-08 22:00:59 GMT (+0000)

Maybe there are some eastern NA ovoideocystidiata observations out there that I’m just not aware of. As Eric says in a previous comment, the spores seen here are not shaped like ovoideocystidiata spores, which have a sorta sub-rhomboid profile due to portions of the contour well approximating linear.

As said in the notes, these are not caerulipes. Both spores and fruit bodies are too large.

Dave W: “P. ovoideocystidiata strictly spring species”
By: Sporulator
2015-11-08 19:01:14 GMT (+0000)

P. ovoideocystidiata was introduced to Europe years ago by mushroom enthusiasts.
And in Europe they fruit regularly not only in spring but also during fall. Maybe due to different climatic conditions.



Spore size/shape…
By: Dave W (Dave W)
2015-11-08 18:27:32 GMT (+0000)

does fit Leratiomyces squamosus thrausta, which is the only member of this genus that I know which grows around here. But these don’t look much like L. squamosus. Neither do the ones I got in the same spot last year (see notes).

Bluing does not come through well in the photos. The cap sans stipe showed darkening that appeared to be the result of bluing.

I believe that P. ovoideocystidiata is strictly a spring species, appearing when the temps first climb up around 80F At least I am unaware of observations of this species during chilly fall conditions. Also, ovoideocystidiata has cap context more durable than the fragile flesh comprising these caps.

The spores
By: Eric Smith (esmith)
2015-11-08 17:39:42 GMT (+0000)

seem the wrong shape for ovoideocystideata. They don’t look much like caerulipes to me either and seem much too big for that. I don’t see any blue bruising. Maybe Leratiomyces?

Maybe psilocybe ovoideocystidiata?
By: PNWShroomer
2015-11-08 17:28:44 GMT (+0000)

Have you ruled out psilocybe ovoideocystidiata?

Created: 2015-11-08 15:24:04 GMT (+0000)
Last modified: 2015-11-12 04:01:42 GMT (+0000)
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