Observation 177572: Amanita pachysperma G.F. Atk.
When: 2014-09-10

Notes: The stipe bases were buried, which made extracting the volva difficult at best. I managed to get one mostly intact.

Color in photos is true, gray centered caps fading toward the margins. No brown overtones.

Specimens are being preserved for study.

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Recognized by sight
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Add Comment
You’re welcome, groundhog.
By: Dave W (Dave W)
2014-10-28 18:32:05 PDT (-0700)

And thank you for taking the time to post a comment for every collection I submit.

These came from a corner of my brother’s property that I remember well. Eventually, I’ll post a few additional details about the habitat.

Thanks Dave,
By: groundhog
2014-10-28 14:05:59 PDT (-0700)

This material has been received and accessioned to Rod’s herbarium. We have also scheduled it for DNA sequencing.

I compared the spores…
By: Dave W (Dave W)
2014-09-11 18:22:29 PDT (-0700)

seen in this obs with some spores I believe to be A. crenulata spores. Assuming the observed crenulata spores have max length about 9 mu, then comparison with the spores in this post (177572) and a little arithmetic produce an estimate of about 15-16 mu for the max spore length observed here.

Eventually, I’ll have a micrometer mounted onto my scope.

Thank you, David.
By: R. E. Tulloss (ret)
2014-09-11 06:07:50 PDT (-0700)

We’re looking forward to seeing the material.

Very best,


These were in pretty good shape…
By: Dave W (Dave W)
2014-09-11 04:38:44 PDT (-0700)

when collected. And I got them into the dehydrator not long after collection. So I think this may be some useful material.

It’ll be time to put together another package soon. This will be included.

I suggest pachysperma.
By: R. E. Tulloss (ret)
2014-09-10 20:33:44 PDT (-0700)

We’ve never found a specimen of pachysperma that yielded DNA…if I remember correctly. This could be a very interesting find.


Created: 2014-09-10 19:50:04 PDT (-0700)
Last modified: 2014-10-28 17:20:06 PDT (-0700)
Viewed: 60 times, last viewed: 2017-06-18 17:33:25 PDT (-0700)
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