Observation 97028: Amanita sect. Amanita

When: 2012-06-10

Collection location: Briarcrest Elementary School, Shoreline, Washington, USA [Click for map]

Who: Tim Sage (T. Sage)

Specimen available

Under Douglas fir. Snakeskin pattern on stipe, some specimens had a distinct annulus on lower stipe.

See this observation for what I believe to be the same species:


Species Lists


A couple days later, cross-section of button, and red staining on cap.
A couple days later, cross-section of button, and red staining on cap.
Spores 8-10.5 um, subglobose

Proposed Names

29% (1)
Recognized by sight
45% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Why Sect. Vaginatae?!
By: I. G. Safonov (IGSafonov)
2012-06-15 08:27:44 WIB (+0700)

I don’t quite get it, gentlemen… These specimens clearly have a ring and a fairly conspicuous bulb. The volva is friable and doesn’t look particularly saccate at any stage of development. Hence, why not consider section Validae or Amanita?
What about clamp connections? Were the spores amyloid?

By: Tim Sage (T. Sage)
2012-06-14 09:51:23 WIB (+0700)

I’ll pack it up and let you know when I ship. Address?

Maybe I should take a look at some of the material that was…
By: R. E. Tulloss (ret)
2012-06-14 09:48:03 WIB (+0700)

dried in good condition.


Not good…
By: Tim Sage (T. Sage)
2012-06-14 09:35:56 WIB (+0700)

Not very experienced and I also can only go to 400×.

Interesting spore photo.
By: R. E. Tulloss (ret)
2012-06-14 08:26:31 WIB (+0700)

The average spore is probably not globose. That’s cool.

How are you at spore measurement?


Spore photo added
By: Tim Sage (T. Sage)
2012-06-14 08:05:54 WIB (+0700)
Thanks, Rod….
By: Tim Sage (T. Sage)
2012-06-14 02:17:35 WIB (+0700)

It was beginning to rot in the fridge, but the other specimens seem fine. They are dried.

The button seems to have decay well under way.
By: R. E. Tulloss (ret)
2012-06-14 02:15:55 WIB (+0700)

Nevertheless, I can see that the stipe base seems not to be expanded and is inserted in a cupulate volva. Hence, I think that we could say this belongs in sect. Vaginatae at least from the existing evidence. A sectioned button young enough for the stipe not to be extended very much would help clarify the sectional placement further.


I’m surprised I haven’t seen it….
By: Tim Sage (T. Sage)
2012-06-14 01:42:28 WIB (+0700)

Bacteria had crossed my mind as well, but it seems rather deep into the flesh (but then again, what do I know about bacteria….).

Thanks, Walt.

Red stains
By: walt sturgeon (Mycowalt)
2012-06-14 00:28:29 WIB (+0700)

are not uncommon on Amanita species. I think it is bacterial.

Note odd red stains in last picture…
By: Tim Sage (T. Sage)
2012-06-14 00:09:58 WIB (+0700)

This was after 2 days in a paper bag, outside.

Thanks for the input, Rod
By: Tim Sage (T. Sage)
2012-06-12 13:06:53 WIB (+0700)


I’ll try to work on this collection tomorrow.

Maybe the apparent annulus is the limbus internus of the volva.
By: R. E. Tulloss (ret)
2012-06-12 04:31:04 WIB (+0700)

Also, it would be interesting to see a cross-section of the lower stem from a button. The point would be to see if there is a hint of a bulb or not. An even younger button sectioned (drawing may be necessary if the outlines of developing tissue are to subtle…because everything is white) would indicate whether the primordium has a roughly centrally located stem or whether it is entirely dominated by a bulb that reduces in later development.

The point of the above is to get support for sectional placement in Amanita.


I’ll post more notes and micrographs later….
By: Tim Sage (T. Sage)
2012-06-12 01:05:06 WIB (+0700)


Very interesting, Tim
By: R. E. Tulloss (ret)
2012-06-11 15:12:10 WIB (+0700)

Have you had a chance to look at the spores?


Created: 2012-06-11 11:41:34 WIB (+0700)
Last modified: 2012-06-15 09:40:46 WIB (+0700)
Viewed: 209 times, last viewed: 2017-10-12 23:39:20 WIB (+0700)
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