Observation 187212: Amanita sect. Vaginatae sensu Zhu L. Yang

One young specimen, solitary
Pileus chestnut brown brighter to the margin
Found near Alnus/Pinus
1 dried specimen available.
Odd volva, with limbs 0,5 cm thick

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in situ
in situ
in situ
in situ

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Thanks Luca
By: groundhog
2014-11-25 15:34:08 EST (-0500)

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

Aha! You are thoroughly ahead of me.
By: R. E. Tulloss (ret)
2014-11-04 06:40:02 EST (-0500)


Yes, I think magnivolvata and pachyvolvata are distinct taxa. I’ve studied the types of both of them. The issue is complicated because magnivolvata was typified by a very northerly collection. This was not a one-of-a-kind accident. A. magnivolvata has been collected repeatedly in Scandinavian countries. I don’t think think this is true (yet) of pachyvolvata. I recently received a collection of the latter from Turkey and there are several good images in books and journals from countries along the northern coast of the Mediterranean.

I am looking forward to your generous packet of materials that sound quite interesting.

Very best,


one more thing about the taxa you mentioned
By: Luca Pasquali (luca)
2014-11-04 05:21:59 EST (-0500)

I came across both the links you mentioned from your site when I found this in late August.
Do you believe A. magnivolvata and A. pachyvolvata to be different taxonomies?
It seems there is confusion among italian mycologists about these two taxa and they tend to think about them as conspecific. I am very happy you are interested in studying this specimen (I sent you a whole half from pileus to volva).
It was amazing finding it, as it’s rare here to find big species of Vaginatae, I hope so see them again next season.
Also when I found it I was unsure about Vaginatae, as there were remains of lamellae attached to the stem which looked like striped annulus in Validae, but there was no bulb, and there had to be more annulus remains; so it had to be in Vaginatae.

herbarium deposits being sent to Roosvelt
By: Luca Pasquali (luca)
2014-11-04 04:48:26 EST (-0500)

I was so sure you could be interested in this collection that I already packaged with your collecting form and sent it to you as well with other 6 different taxa collected and published here (you will have this odd taxa, 4 white Vaginatae with umbonate pileus and smooth stipe and thicker volva, 2 white Vaginatae with convex to depressed pileus with little white cottony scales on the stipe). I’ll email you the complete list of collection in a while, so you’ll know if something is missing, I have backups for 4 of 7 collections.

There are a limited number of taxa in the Northern Hemisphere with a very robust volva.
By: R. E. Tulloss (ret)
2014-11-03 21:33:19 EST (-0500)

In Europe there are at least two such taxa Amanita pachyvolvata and A. magnivolvata. Amanita islandica can have a very large volva; however, I can’t recall if it is also thickened as in the other two species. The latter may be restricted to more northern regions and is quite white. However, pachyvolvata and magnivolvata have both been claimed for Mediterranean countries including Italy.



I would be very interested in seeing your dried material…whatever portion of it that you wish to share. It is important that I get parts of all tissues from top to bottom if you plan to send a piece of the material.

Very best,


Created: 2014-11-03 20:30:22 EST (-0500)
Last modified: 2018-01-05 13:35:52 EST (-0500)
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