When: 2010-06-19

Collection location: Bartow Co., Georgia, USA [Click for map]

Who: AmatoxinApocalypse (AmatoxinApocalypse)

No specimen available


[admin – Sat Aug 14 01:58:14 +0000 2010]: Changed location name from ‘Bartow County, Georgia’ to ‘Bartow Co., Georgia, USA’


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Some evidence, no certain conclusions…
By: R. E. Tulloss (ret)
2010-06-19 20:16:39 PDT (-0700)

Amanita farinosa is connected very far down the Amanita section Amanita tree. As you probably recall, the most recently sequenced part of section Amanita dealt largely with the near relatives of Amanita muscaria…and A. farinosa was not shown in the tree if I remember correctly.

I can recall two trees from the late 1990s. The papers’ authors were Drehmel et al. and Weiss et al. In the first paper, there was some confusion caused by the introduction of a sectional name (Ovigerae) that is a synonym of sect. Vaginatae. Even more confusion was introduced by by treating farinosa as a species belonging to that section Ovigerae. The type species of section Ovigerae is a species of section Vaginatae (we know this because it was illustrated in color by Bresadola and the two candidates for the type of the species were examined by Bas who wrote annotations based on his examination of the dried material … and I have copies of these notes.

One thing that both papers illustrate is that A. farinosa is “near” basal of section Amanita (i.e. is on a branching that connects to the rest of the tree near the bottom or root of the tree). Morphologically, candidates for relatives of A. farinosa include species such as A. nehuta and A. sinensis. If my memory serves, the latter is a market mushroom in southern China (i.e., apparently a desirable comestible).

From this you might suspect that nehuta and farinosa do not contain toxins either. But the only way to know for sure is to test them and their phenetic (morphological) relatives for ibotenic acid, etc.

Very best,


Muscimol and Ibotenic Acid?
By: AmatoxinApocalypse (AmatoxinApocalypse)
2010-06-19 17:21:15 PDT (-0700)

I was wondering about the content of these two chemicals in this species since it is related to A. muscaria and other Amanita species which contain these chemicals. I was just reading the wiki page about this species and found this out, I never knew this before, any info would be greatly appreciated.

Below is the link to the wiki page on this species.


Also if anyone knows where I can find info on the DNA studies that have been done on the genus recently I would be grateful.

God Bless