Observation 322378: Amanita stirps Sororcula

When: 2018-07-07

Collection location: Hawn State Park, Sainte Genevieve Co., Missouri, USA [Click for map]

Who: weed lady (Sylvia )

No specimen available

Found in sandy soil. Gray cap has warts. Stalk showing what I would call chevrons.
Brought this specimen home, however now cannot locate it. Darn!


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I appreciate your additional search on MO.
By: R. E. Tulloss (ret)
2018-07-10 06:16:46 PDT (-0700)

168062 in particular was identified with support of two gene sequences. That gives me a good deal of confidence in the identification of that material because we were only able to start sorting out the rhacopus-like taxa when we got access to DNA sequencing.

Very best,


Dr. T,
By: weed lady (Sylvia )
2018-07-10 05:12:51 PDT (-0700)

Sometime late last night I did think that the specimen would be compromised for your purposes. Yup! It was right at the bottom of the paper bag beneath numerous other mushrooms. I have now looked at observations: 212032 (from same location), 318194, 168062 and 279103. A. texasorora has been seen in that park quite close to the one under discussion. It was found in sandy soil with pines as in 168062 and 279103. So, I am changing my vote to A. texasorora as a “could be” and it could. That is an unscientific analysis, but I am an unscientific person. I really appreciate all your help and comments on this one. Wish I could have provided you with a good specimen to further investigate. I enjoyed finding it. Regards, Sylvia

Some times the warts are lost from the cap (under the right weather conditions).
By: R. E. Tulloss (ret)
2018-07-09 21:48:12 PDT (-0700)

I’m very happy to know you found the specimen. Do you think it might of a mixture of spores on it from the bag in the fridge? That might create contamination.

Very best,


I might add — as for color — I remember thinking that specimen was very well
By: Judi T. (AvidAmateur)
2018-07-09 14:39:38 PDT (-0700)

camouflaged against the light sandy soil; and, of course, photo colors are entirely dependent on light as your know.

Sylvia, As you requested, I posted all the photos I have of the cryptic
By: Judi T. (AvidAmateur)
2018-07-09 14:34:21 PDT (-0700)

Amanita you spotted at the very end of our bountiful foray last Saturday. Glad you found the specimen and can get it to Dr. Tulloss for a more definitive ID. Hawn Park is definitely Amanita Heaven:)

That is my Ob. #322504.

ret Dr. Tulloss
By: weed lady (Sylvia )
2018-07-09 12:00:20 PDT (-0700)

Eureka! I think I found it. Was at the bottom of a bag of throwaway fungi from Saturday still in the refrigerator. I know of nothing else I found that day that remotely looks like this one. If you like, I can dry thoroughly and mail it to you. The original cap photo was taken when I first saw it. Feel that the specimen was VERY fresh. It was not in a particularly sunny spot. I’d call this pearl gray, not dark gray.Soil quite sandy. Believe the other photos on my observation were taken later. Can send any further information when I hear from my friend who also posts on MO. Maybe she will comment further. I did look at Patrick’s observation, 109740, but did not see what I call warts on the cap. Regards, Sylvia

While sp-V03’s ITS sequence is distinctly different from that of A. rhacopus
By: R. E. Tulloss (ret)
2018-07-09 10:10:08 PDT (-0700)

…(consistently 3-4 characters of ca. 1300), it is less distant from texasorora (consistently 1 character). Hence, whether the latter two are distinct or not will depend on data we don’t yet have from other genes.

By: weed lady (Sylvia )
2018-07-09 09:35:28 PDT (-0700)

Yes, the color shown in the photo looks quite accurate to me. The specimen, when found, was fresh and pristine. I think there will be another person posting this. I will contact her and see if she agrees and most likely she will also post this observation. Sylvia

See MO #109740.
By: R. E. Tulloss (ret)
2018-07-09 09:33:27 PDT (-0700)


Of the species of stirps Sororcula, the only one know from Missouri is …
By: R. E. Tulloss (ret)
2018-07-09 09:28:59 PDT (-0700)

Amanita sp-V03. We now have sequences from several locales for this possible species. These sequences are strikingly similar to those of texasorora. More work with more different genes may clarify the situation.

The cap color in the photographs (if it is accurate), seems to have been faded a bit (perhaps from sunlight?) compared to other images of the two candidate IDs.

Very best,


By: weed lady (Sylvia )
2018-07-09 03:15:57 PDT (-0700)

Thought you were the bolete person, but sure looks like your knowledge is way beyond just that. I quickly looked at other observations of Amanita stirps Sorocula and that looks good to me. Think you have one. I had to look up the word “stirps”. Thanks so much for all your help now and in the past. Sylvia

Created: 2018-07-08 12:29:07 PDT (-0700)
Last modified: 2018-10-29 10:48:58 PDT (-0700)
Viewed: 104 times, last viewed: 2018-12-30 09:45:50 PST (-0800)
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