Observation 143706: Amanita sect. Caesareae Singer

Proposed Names

86% (1)
Eye3 Eyes3
Recognized by sight: This is A. jacksonii, but there is something EXTREMELY weird going on with the gills! Is this the result of a parasite?

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks Patrick,
By: groundhog
2013-11-26 21:23:33 CET (+0100)

This material has been recieved and accessioned into Rod’s herbarium. We have also scheduled it for DNA sequencing.

Thank you, Patrick.
By: R. E. Tulloss (ret)
2013-08-25 18:21:21 CEST (+0200)

I had seen two, and you got them both. It’s very kind of you to take the time to fix them.

Very best,


I caught one …
By: Patrick Harvey (pg_harvey)
2013-08-25 17:51:39 CEST (+0200)

Let me know if I missed any others

There’s nothing like having someone post one’s email to bring out the evidence…
By: R. E. Tulloss (ret)
2013-08-25 17:36:13 CEST (+0200)

of one’s typographical errors. :)


Reply to my email from Dr. Tulloss
By: Patrick Harvey (pg_harvey)
2013-08-25 17:12:04 CEST (+0200)

Hello, Patrick.

Just woke up after a long, long day yesterday traveling to and from DC and
participating in the March on Washington.

It looks a bit as though a Hypomyces is starting to attack the entire fruiting
body. There’s a white film over the caps of many of the specimens; and the stem
surface also seems abnormal. There is another disease that attacks some species of section Caesarea…Mycogone rosea.

The margin of the cap is too yellow too soon for jacksonii, I think.

Very best,


Dr. R. E. Tulloss
ret@eticomm.net [<= Share DropBox folders to this email only, please]


Herbarium Amanitarum Rooseveltensis
P. O. Box 57, Roosevelt, NJ 08555-0057, USA

Hello, Patrick.
By: R. E. Tulloss (ret)
2013-08-25 17:07:03 CEST (+0200)

If you would most my response to your email, I’d appreciate it.

Very best,


The normal ones all have yellow gills and stipe
By: Patrick Harvey (pg_harvey)
2013-08-25 14:34:25 CEST (+0200)

Perhaps the color is from the Hypomyces, or whatever it is. I have never found other Caesareae in the picnic area of the park. A. banningiana has been found, but farther away, up in the hills. See my recent A. jacksonii observation.

It is cool whatever it is,
By: Martin Livezey (MLivezey)
2013-08-25 04:07:24 CEST (+0200)

and it could be a mold or hypomyces of some type. It seems odd that it would affect the button, which does not look much like Aj. Also, Aj in my neck of the woods has yellow gills, ring, and stipe – distinctly yellow even when old. I guess most any mushroom can split as this cap has – especially amanitas – but the striate cap I look for is not here, or it is hidden. The last one I saw had a serrate margin.


Patrick – my congrats on your recent article in FUNGI magazine.

oh yeah…
By: Debbie Viess (amanitarita)
2013-08-25 02:02:50 CEST (+0200)

something rotten in gill city!

but how are you so sure that the base amanita is a jacksonii?

Created: 2013-08-25 01:16:27 CEST (+0200)
Last modified: 2013-08-25 17:47:53 CEST (+0200)
Viewed: 67 times, last viewed: 2017-06-16 18:01:20 CEST (+0200)
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