Observation 214290: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2015-08-22
No herbarium specimen

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I wish you good luck.
By: R. E. Tulloss (ret)
2015-08-29 11:34:24 CDT (-0400)


I sure wish
By: Matt Welter (mattfungus)
2015-08-29 09:19:23 CDT (-0400)

I still took pics of the fungi with my gps. I use to do that but found it too tedious and others asked why I was even doing that. Right now I know its at navarino near a patch of ginger and the approximate relativity to other mushrooms I had seen. Its only been a week.

I did carefully extract the specimen from the soil to try to get the volva, so what you see in the pic is what I was able to get. I will let you know after sunday if i am able to find similar specimens but I doubt I will find the same specimen.

No, we’re not going that way, Matt.
By: R. E. Tulloss (ret)
2015-08-29 09:02:45 CDT (-0400)

Notice that the edge of the cap has short, but distinct and relatively regular grooves. A striate cap margin is not typical of destroying angels. It is typical of species in sections Vaginatae (ringless in almost all species outside of a few in central Africa) and Caesareae (bearing a ring on the stem in all species that are known).

So David and I are talking about whether this species (which we think would have a sack-like volva if it were collected in its entirety) could be in the Caesareae or the Vaginatae.

David is suggesting that the material on the top of the stem could be a membranous, skirt-like ring. I was saying that my first impression was that it was not, but that he could be right.

In the end we hand it back to you. If you find the material again, your observation of the material, your careful collection of the whole stem, and your new photographs are the best chances that this mushroom has to being placed in the correct section of the genus Amanita. If you collect and dry the material, then greater goals could be reached, microscopic examination could be done, molecular data could be extracted, etc.

Very best,


I thought that it might be raised surface material or surface splitting.
By: R. E. Tulloss (ret)
2015-08-29 08:17:22 CDT (-0400)

This is another thing that could be checked if the material can be found again. Also, the base of the stem should be carefully extracted from the soil. The stem base is very critical to identification of Amanita species.

With regard to my studies, Matt. I concentrate on the family Amanitaceae. I’ve studied species in this group for over 35 years. One product of this study is the www.amanitaceae.org website. I am particularly interested in section Vaginatae and other groups that have been largely ignored because of their daunting complexity. This is possible today because we can combine molecular and morphological methods.

Very best,

Rod Tulloss

If I follow what you’re saying
By: Matt Welter (mattfungus)
2015-08-29 08:15:04 CDT (-0400)

this is more likely virosa than vaginata.

There appears to be…
By: Dave W (Dave W)
2015-08-29 00:20:09 CDT (-0400)

material on the upper stipe. Looks like it may be an appressed annulus.

I will remember that
By: Matt Welter (mattfungus)
2015-08-29 00:07:44 CDT (-0400)

I am going back out to the spot on the 30th. perhaps there will be some still remaining.

What is your study?

White the stipe base is missing (too bad), there is…
By: R. E. Tulloss (ret)
2015-08-28 23:59:57 CDT (-0400)

a membranous white patch of volva on the cap.

I am very interested in white species of section Vaginatae. If you ever have the time to dry such material, I would be interested in looking at it.

Very best,

Rod Tulloss

Created: 2015-08-28 23:49:58 CDT (-0400)
Last modified: 2015-08-29 00:02:47 CDT (-0400)
Viewed: 59 times, last viewed: 2017-06-20 16:20:10 CDT (-0400)
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