Observation 168734: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2014-06-29

Notes: Oak and hardwood forest.

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Thanks Jon,
By: groundhog
2015-06-23 14:00:27 PDT (-0700)

We have recieved this material and it has been accessioned to Rod’s herbarium. We are scheduling it for DNA sequencing.

Thank you, Jon.
By: R. E. Tulloss (ret)
2014-06-30 09:02:23 PDT (-0700)


I will send it with the other collection Dr. T. Jon
By: Jon (watchcat)
2014-06-30 08:52:48 PDT (-0700)
The reason that I asked about cap size….
By: R. E. Tulloss (ret)
2014-06-30 07:39:25 PDT (-0700)

I notice the extreme prominence of the umbo. We have found (rarely) in Connecticut a species with a very prominent and hard umbo. It reminds me the similar umbo that is present on some species of Termitomyces and seems to serve the purpose of perforating a hard-as-concrete termite mound. (The weird case of the animal whose food blows up it house.)

The amanita mentioned seems to arise from a very deeply buried primordium and has to come up a long way through the soil before it breaks the surface.

If you find Vaginatae with very acute umbos such as the one in your photos, I think you should assume that the base of the stem is very, very much farther down in the grown than you might think…in larger specimens, I think may have to excavate as much as 8 inches of substrate to find the base of the stem.

If you are finding material in this group, I really would like to see it. We have had terrible luck with drying the collections that we have found to date. In once case, somebody shut off the power over night and we lost everything in the dryer…including this deeply originating critters.

Very best,


about 3 inches Dr. T.
By: Jon (watchcat)
2014-06-30 07:17:55 PDT (-0700)
Yes, I’d like to see the material.
By: R. E. Tulloss (ret)
2014-06-30 06:38:38 PDT (-0700)

It is not something that I see commonly in my home collecting area.

Can you give me an approximation of (say) the width of the cap?

Very best,


Not sure but I have this specimen saved for you. Jon
By: Jon (watchcat)
2014-06-30 05:57:43 PDT (-0700)
Hello, John.
By: R. E. Tulloss (ret)
2014-06-29 21:14:31 PDT (-0700)

The stipe base seems to have suffered some indignities between the picture of the stipe in the ground and the picture out of the ground. It was clearly hard to get a nice clean extraction. It looks to me as though there are some bits of gray volva on the stipe in the stipe-in-ground photo…or do you think they are just soil?

Very best,


Created: 2014-06-29 18:28:05 PDT (-0700)
Last modified: 2014-06-29 21:12:03 PDT (-0700)
Viewed: 36 times, last viewed: 2016-10-27 18:39:40 PDT (-0700)
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