Observation 25395: Amanita castaneogrisea Contu nom. inval.
When: 2009-09-11
Who: clancy
No herbarium specimen

Proposed Names

-5% (3)
Recognized by sight
61% (2)
Used references: See comments from RET.
54% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Yes, Paul
By: R. E. Tulloss (ret)
2009-09-25 09:03:58 PDT (-0700)

Contu (who doesn’t know the taxon so far as I know), simply proposed a name on the grounds that I had said it was a new taxon. Apparently, he was a bit hasty and didn’t fulfill the requirements of the Intl. Bot. Code of Nomenclature. Actually, I planned to use a different name; but Contu’s name is (occasionally) in use. I don’t want to change it just for my bruised ego. :) I will eventually validate Contu’s name.


By: Paul Derbyshire (Twizzler)
2009-09-25 07:01:33 PDT (-0700)

is the name considered “nom. inval.” rather than “nom. prov.”?

The graying upper part of the volval sack….
By: R. E. Tulloss (ret)
2009-09-25 06:52:20 PDT (-0700)


The graying upper part of the volval sack is not a character associated with A. vaginata.

In Scotland, I have personally collected a species that has a rather deep brown cap and a graying upper portion of the volval sack. This material has been incorrectly referred to Amanita submembranacea in the past.
After a review of the type collection of Amanita submembranacea var. bispora D. A. Reid (published in Mycotaxon in 1994), I concluded that the entity was an undescribed species. An invalid name was proposed for the species by Dr. M. Contu — A. castaneogrisea. The name has not been validated, but it is in use:


The picture at the site is a bit too dark, and the fruiting bodies are older than the ones in your pic; however, your pix and mine (from the Highlands and Islands Region) seem very similar to me.

Very best,


P.S. The range of “castaneogrisea” extends to Norway at least.

Created: 2009-09-16 15:36:10 PDT (-0700)
Last modified: 2015-05-30 09:19:08 PDT (-0700)
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