Observation 154621: Amanita muscaria var. guessowii Veselý nom. inval.

When: 2013-10-17

Collection location: Turkey Point, Ontario, Canada [Click for map]

Who: Eva Skific (Evica)

No specimen available



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Very interesting
By: Erlon (Herbert Baker)
2013-12-09 17:07:02 CST (-0500)

While I got you on the line; do you consider clade II/A to be a solid yellow species in the PNW? If yes, where are the other color variants in the west(I see none here at M.O.)? Also, what can you tell me about the morphology of clade I/A in the east? I will check out the search feature in the comments section. Thank you!

Hi, Herbert.
By: R. E. Tulloss (ret)
2013-12-09 16:47:32 CST (-0500)

I suggest that you use the comment search capability to look for my comments on chrysoblema.

1. We know that in North America,
..in the northwest there are red, yellow, and white color variants of A. muscaria; and

..in much of the remainder of the content as well as in the NW there are three names being applied to color variants of a single, strictly American species with a natural range extending from southern Alaska to at least Costa Rica.

2. David Jenkins proposed that A. chrysoblema is a taxonomic synonym of A. muscaria var. alba Peck.

3. If that is true, then A. chrysoblema is the only existing name at species rank that could be applied to all the red, white, and yellow color variants of the dominant muscaria-like species in our continent.

4. So far all the muscarioid taxa on the MAINLAND of North America have come out as four genetic clades:

..muscaria color variants ..persicina ..regalis ..the N. A. dominant muscarioid taxon’s color variants.

5. We have too few collections of the white variant of the fourth taxon.

6. If we had MORE collections of the white variant of the fourth taxon, it
would be much more supportive of the idea that Jenkins was correct, that is, that there is one muscarioid species with a single white variant in eastern North America.

7. Hence, this year I have asked for every “muscaria var. alba” collection that I saw mentioned on MO.

8. These are all going to be sampled for DNA sequencing.

9. If we end up with specimens from Michigan-Ontario-Wisconsin to the Atlantic being all one taxon, then I’ll propose that there appears to be only one thing that is white and muscarioid in that region and that the proper name for that entity is chrysoblema and, hence, that the proper name at species rank for the dominant N. A. muscarioid is chrysoblema no matter what color any individual specimen may be.

I’d really like this to be the last time I explain this on MO.

Very best,


Question for Rod
By: Erlon (Herbert Baker)
2013-12-09 15:51:51 CST (-0500)

Is Amanita chrysoblema a synonym of A. muscaria var. guessowii that would currently take precedence since it was published in 1918? Thank you.

Hello, Eva.
By: R. E. Tulloss (ret)
2013-12-09 15:33:04 CST (-0500)

I’m inclined to think this is a pale var. guessowii, Eva.

Very best,


Created: 2013-12-09 14:54:45 CST (-0500)
Last modified: 2013-12-09 15:38:45 CST (-0500)
Viewed: 46 times, last viewed: 2017-06-17 18:14:48 CDT (-0400)
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