Observation 215183: Amanita pseudovolvata Tulloss nom. prov.
When: 2015-08-09
No herbarium specimen

Notes: Growing in mixed forest, including hemlock. No distinctive odor noted.

Images

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Copyright © 2015 Nancy Carey
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Copyright © 2015 Nancy Carey
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Copyright © 2015 Nancy Carey
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Copyright © 2015 Nancy Carey

Proposed Names

46% (2)
Recognized by sight
51% (3)
Eyes3
Recognized by sight: Cap margin distinctly short-striate.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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You’re welcome.
By: R. E. Tulloss (ret)
2015-09-05 08:07:55 CDT (-0400)

You might want to check the eastern North American options below.

Because of its long stem and large, often tubular volval sack, A.whetstoneae” can be eliminated in this case:

http://www.amanitaceae.org ?Amanita%20whetstoneae

Amanita volvata can be eliminated because it is more robust and has (at least at first) a densely floccose upper part of the stem:

http://www.amanitaceae.org?Amanita%20volvata

Amanita peckiana is the only species in section Amidella that is known to (briefly) have a partial veil in youth, and I’ve already mentioned other reasons that it is unlikely to be the species illustrated here:

http://www.amanitaceae.org?Amanita%20peckiana

There are at least two (usually) smaller species of which yours may be one (as David W. has suggested). These may have a 50-50 chance of being separated by the naked eye or in photographs:

http://www.amanitaceae.org?Amanita%20pseudovolvata

http://www.amanitaceae.org?Amanita%20dolichopus

And at least one more narrow-spores species

http://www.amanitaceae.org?Amanita%20sagittaria

In general, the species of sect. Amidella can be quite difficult to separate by macroscopic characters.

A study of the section using molecular characters has begun, but needs to progress in close association with expanding morphological knowledge. That is going to take time.

Very best,

Rod

Section Amidella
By: Pfiff Carey
2015-09-04 21:54:14 CDT (-0400)

Thanks for your info on A. peckiana and mention of other possibilities.

By: R. E. Tulloss (ret)
2015-09-04 07:56:37 CDT (-0400)

does not have darkening volval patches on the cap and the color changing reactions are very limited. The spores of peckiana are quite narrow compared to those of volvata, pseudovolvata, and dolichopus.

Very best,

Rod

Created: 2015-09-03 19:46:37 CDT (-0400)
Last modified: 2016-02-12 00:06:44 CST (-0500)
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