Growing on a ridge side below hickories and oaks (in moss) in a dense mixed hardwood/coniferous forest.

Zonate cap. Stem hollow. I, unfortunately, made a mess of the bulb when trying to dig it out from deep moss! See this observation:


Proposed Names

91% (2)
Based on chemical features: nrLSU is distinctive for this amanita. This collection provides the concept for the provisional name

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= Observer’s choice
= Current consensus


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You have found somethign very interesting and with interesting (apparent) …
By: R. E. Tulloss (ret)
2019-09-16 06:02:09 PDT (-0700)

… relationships to other amanitas.

I don’t know how it is I have become so fascinated with such a difficult (and large) group of amanitas late in my working life, but I’ve managed to get caught up. :) I’m really grateful that there are a lot of people, like yourself, that are willing to help me wade into what seems like an ocean of data with regard to section Vaginatae.

Many thanks.


By: Lisa Kimmerling (L_Kimmerling)
2019-09-14 09:50:34 PDT (-0700)

I am beyond excited to hear your results. I must admit that your naming is absolutely PERFECT!

I am so happy to have contributed to your research (and to have given you something challenging). Thank you so much for all of your hard work!

I think that I can’t resist “oakman” in a name. It is totemic.
By: R. E. Tulloss (ret)
2019-09-14 09:05:43 PDT (-0700)

I propose the name Amanita oakmanensis nom. prov.

In a BLAST run against GenBank’s current data set, the closest species is Amanita trygonion with a genetic distance of 1.0% (10 differences out of 974 characters).

I am swamped right now, but we will aim to create a more than skeletal page at this address:

After carefully revisiting the cap coloring I think there are two colors. The shadows in the striations give the illusion of a dark zone to the striate region of the cap. I find this is a rather common phenomenon.

Very best,


A good nrLSU sequence has been derived from the voucher of this observation.
By: R. E. Tulloss (ret)
2019-09-14 08:53:43 PDT (-0700)

The sequence has a small ambiguous region early in the nrLSU sequence and ambiguities are so numerous in the nrITS that I made the decision to only use the “half” of that sequence that connected with the LSU sequence. This is the first case of sequencing this particular species. However, I suspect that all attempts to sequence this mushroom will prove to have difficulties with editing that we experienced in this case.

The species has the initial character segment of nrLSU that determines the “series Penetratrices”.

After looking at the images further, I will have another sentences or two.

Thank you very much for sending me something puzzling.

Very best,


This material was accessioned in our herbarium today.
By: R. E. Tulloss (ret)
2018-11-25 19:45:32 PST (-0800)

The accession number has been added to this observation (above).

We are scheduling the material for sequencing and will notify you of sequencing results on on this page in the future.

Thank you very much for send your material to us for our research.

Very best,

Rod Tulloss

Thanks for the heads up on facebook.
By: R. E. Tulloss (ret)
2018-10-16 08:52:08 PDT (-0700)

Yes, I would like to examine this material.

Very best,