Observation 72832: Amanita Pers.

When: 2011-07-27

Collection location: Lackawanna Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Upon digging down about 1.5 inch along the stipe I could find no basal bulb or well developed volval sac. There did appear to be remains on a friable volva. The stipe was growing wedged alongside a tree root, which may account for an abnormality. Spore profile fits bisporigera.

Compare with: http://mushroomobserver.org/72548?q=5p0p



Proposed Names

48% (2)
Eye3 Eyes3
Recognized by sight
Based on microscopic features: wide range in spore size/quotient with some large elongated spores.
Based on chemical features: Spores strongly amyloid.
31% (2)
Recognized by sight: See comment.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
The voucher for this collection has been sampled; the sample has been sent for DNA sequencing.
By: R. E. Tulloss (ret)
2018-06-01 07:34:57 PDT (-0700)

Since this was reported as KOH-, I thought we should check into it.

Very best,


By: I. G. Safonov (IGSafonov)
2018-01-03 08:03:53 PST (-0800)

Interestingly, I saw this observation yesterday – or may be even the day before when it got updated concomitantly with 73731 with a herbarium record – and maryaliceae did cross my mind, as its pic looks like the one on Rod’s website. In addition, your comment regarding the absent bulb and friable volva in the ground made me more suspicious about this not being a Destroying Angel type. But after reading the below comments from you and Rod and being unable to zoom in into the pix, I kind of discarded this idea.
However, I now agree that this obsie has a better chance of being maryaliceae than 73731.

Found in the same area…
By: Dave W (Dave W)
2018-01-03 07:19:33 PST (-0800)

as obs 73731 and bears resemblance to this other mushroom.

Spore pic is not very good, but good enough to see that Q for this mushroom is significantly smaller than what appears to be the case for 73731, and possibly in line with maryaliceae (if one discounts those with profile likely angled, presumably causing the length to appear smaller).

Thanks Dave,
By: groundhog
2013-07-02 07:49:06 PDT (-0700)
This material has been accessioned into Rod’s herbarium.


By: R. E. Tulloss (ret)
2011-08-15 19:08:47 PDT (-0700)

Then we’ve got it. Your bag arrived in Roosevelt safe and sound.

Very best,


The one seen here in this obs
By: Dave W (Dave W)
2011-08-15 18:34:18 PDT (-0700)

is one which I handed to Christina at NEMF.

By: R. E. Tulloss (ret)
2011-08-15 09:45:10 PDT (-0700)

We’ll try the experiment on some of our dried material of A. bisporigera. If I don’t report soon, bug me.


Broke off a little piece of cap.
By: Dave W (Dave W)
2011-08-11 05:47:56 PDT (-0700)

No yellow reaction with 5% KOH.

Why not try it?
By: R. E. Tulloss (ret)
2011-08-11 05:11:16 PDT (-0700)

I’ve never done it, and I’m sure someone has tried it, but I can’t remember the results with certainty. Why not give it a try?


By: Dave W (Dave W)
2011-08-10 23:57:03 PDT (-0700)

I keep forgetting that yellow with KOH is a bisporgera trait!

Does it make sense to break off a little piece of the dried cap and apply KOH?

By: R. E. Tulloss (ret)
2011-08-10 07:50:08 PDT (-0700)

Did you try putting 5% or, better, 10% KOH on the cap or stem?


Created: 2011-07-29 06:52:13 PDT (-0700)
Last modified: 2018-06-01 07:34:59 PDT (-0700)
Viewed: 155 times, last viewed: 2018-09-07 21:32:58 PDT (-0700)
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