Observation 94872: Amanita volvata (Peck) Lloyd
When: 2011-08-25
Herbarium specimen reported
0 Sequences

Proposed Names

30% (2)
Recognized by sight: The only thing I can find that resembles this is Amanita species in section Amidella. Not a well pronounced bulb at the base of the stem though.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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The apparent bulb in amidellas is
By: R. E. Tulloss (ret)
2012-05-16 21:14:38 PDT (-0700)

due to the extreme thickness of the volval sac.

The staining reaction looks too strong for both A. peckiana and A. whetstoneae. The mushroom is too robust for A. dolichopus,and A. pseudovolvata is only very rarely as large as you describe and doesn’t have the densely floccose upper stem.

I’m going to suggest A. volvata.

Very best,


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-05-16 20:53:46 PDT (-0700)

About the bulb, I guess I was looking at so many pictures and the majority showed a bulbous base.

Cap: 2.5 inches
Stem: 6.5 inches long from apex to base, slender.

Also there were some orange/red staining on the volva. I added some new pics.

Amidella doesn’t have a bulb, so that’s fine…I’d say, “Go for it.” [edit]
By: R. E. Tulloss (ret)
2012-05-16 20:30:34 PDT (-0700)

Can you give me a feeling about the dimensions of this mushroom?

Can you get an image of the cap in natural light? It would be good to see what colors are developing on the remnants of volva and on the cap’s surface as well.

The dense layer of flocculence at the top of the stipe suggests A. volvata, I’m not sure that I can discount some other taxa because I can’t tell what the intensity of the color will be when the oxidation reactions of the volval material set in.

[edit] I think the volval sac has collapsed and was probably more globose in its original form (ignoring the flap of tissue that got flipped to one side off the expanding cap). If this guess is correct it would eliminate A. whetstoneae.


Created: 2012-05-16 19:58:21 PDT (-0700)
Last modified: 2012-05-16 21:16:10 PDT (-0700)
Viewed: 51 times, last viewed: 2017-06-12 22:10:02 PDT (-0700)
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