Observation 180580: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2014-09-27
( 450m)
No herbarium specimen

Notes: Habitat: near oak tree.

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two days later…
By: Bojan Seguljev (Bojan)
2014-09-29 17:35:02 BST (+0100)

Today, I visited the site and collected the specimen. It is almost dried. I added two more photos.

As I remember:
By: Bojan Seguljev (Bojan)
2014-09-28 17:59:49 BST (+0100)

…cap was 7-8cm in diameter. When I took the picture I used silver collapsible reflector to get authentic colors. But it still could lead to shift in colors.
Volva, indeed, had a vivid rusty-red color.
I did not take a specimen. I left it as I found it. Tomorrow I’ll try to go to the same place, but I am not sure I’ll find it.
Once again thank you for your help.

The species of which I was thinking….
By: R. E. Tulloss (ret)
2014-09-28 16:24:30 BST (+0100)

is little known and is represented on-line here:

http://www.amanitaceae.org?Amanita+flaccida

the current correct name for this entity is A. umbrinolutea var. flaccida." I do not believe that it is closely related to A. umbrinolutea based on morphology.

I’m sorry that there is no world key for the Vaginatae. At least there is none of which I know.

I will wait for your reply to my previous questions and comments.

Very best,

Rod

Although it is not alone in this problem, sect. Vaginatae is one of the very…
By: R. E. Tulloss (ret)
2014-09-28 16:15:46 BST (+0100)

under-studied sections of the genus Amanita.

So there is no easy road to determination. It is even possible that the species you photographed is not named…despite the long European history of mycological studies.

First of all, is the green tint in the cap something you preceived with your eyes (as opposed to recording with your camera)? The green could be due to the color of light reflecting from leaves or the color of light passing through the tree leaves. Can you take another picture (without flash) in the shade with open sky above (to reduce glare and eliminate as much reflected color as possible)?

I would like to see the “true” color of the cap.

I assume that the volval sac at the base of the stem was roughly tubular. It looks as though it has a rather strong red stain on the outer surface. Are these assumptions and observations correct?

Can you give me an idea of the diameter of the cap? How about the length and width of the stem?

I know of one European species with a volval sac that can become distinctly orange-brown to red-brown. I will have to look up the color of the cap on that species. If I remember correctly it is known both from England and from an area near the Atlantic coast of France. I will get more information for you on that in a few minutes.

Do you have access to a microscope?

Did you retain dried material of the mushroom that you photographed?

I think it will be necessary to have well-dried material in a good state of preservation (not cooked, not burned, not covered with mold) in order to know if your material can be determined or is something new to science.

Very best,

Rod Tulloss

Amanita
By: Bojan Seguljev (Bojan)
2014-09-28 15:24:18 BST (+0100)

Thank you for your comment.
Is there a way to accurately determine the species.

Best regards,
Bojan.

The color pattern on the cap of A. umbrinolutea
By: R. E. Tulloss (ret)
2014-09-28 14:43:47 BST (+0100)

involves alternating zones of a dark reddish brown and a shade of somewhat yellowish-tan. Because of this, I don’t think that your image represents umbrinolutea.

It does seem that you have as species of Amanita sect. Vaginatae.

Very best,

Rod Tulloss

Created: 2014-09-28 08:58:42 BST (+0100)
Last modified: 2016-03-31 01:56:29 BST (+0100)
Viewed: 51 times, last viewed: 2016-03-31 01:56:29 BST (+0100)
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