Observation 23129: Amanita volvata (Peck) Lloyd
When: 2009-07-12
No herbarium specimen

Proposed Names

-15% (4)
Eye3
Recognized by sight: Bruises dark red. The volva is extremely thick.
65% (3)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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I agree this species is probably a species of sect. Amidella
By: R. E. Tulloss (ret)
2009-07-16 22:54:10 BST (+0100)

The lack of red-brown oxidation reactions on a mature cap is unusual for both A. volvata and A. pseudovolvata. This could be A. peckiana.

I have examined material of A. peckiana originating from Michigan to the Gulf Coast. I just determined two collections of Dr. Clark Ovrebo’s from eastern Oklahoma.

Amanita peckiana will often have a membranous partial veil (IN THE BUTTON STAGE ONLY) which quickly disappears. I think it is the only species in the section that has an annulus even briefly. Secondly, A. peckiana stains weakly compared to other species of sect. Amidella. Thirdly, by sectioning the stipe lengthwise you can see if the stipe splits on an imaginary line above its base making it appear that there is a substantial volval sac INSIDE the real volval sac. Fourthly, the spores of A. peckiana are strikingly narrower and more elongate than the spores of A. volvata, A. pseudovolvata, and two similar undescribed taxa of the eastern U.S. For interested parties who haven’t done so, I suggest a look at the species of section Amidella listed in the (1) NJ Pine Barrens, (2) East Texas, and (3) Great Smokies illustrated checklists on the Amanita Studies web site.

I hope to have some new illustrations for A. peckiana on the site relatively soon; but other useful info is already present.

Very best,

Rod

Saccate Volva
By: walt sturgeon (Mycowalt)
2009-07-12 23:29:18 BST (+0100)

Looks like Amanita volvata or Amanaita pseudovolvata.

Created: 2009-07-12 20:21:23 BST (+0100)
Last modified: 2009-07-12 20:21:23 BST (+0100)
Viewed: 156 times, last viewed: 2016-11-23 09:07:12 GMT (+0000)
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