Observation 209352: Amanita penetrans Tulloss & Kudzma nom. prov.
When: 2015-07-09

Notes: 2 of 2 found on this mornings hike.
very tall white stipe over 9" in length
deeply rooted in the ground
very nice cone shaped base and cup intact

Proposed Names

54% (1)
Based on chemical features: This material forms the basis of the concept of the temporary code name.
81% (1)
Based on chemical features: Amanita penetrans is a provisional name proposed to replace the code name “sp-MO05.”

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
You’re very welcome, John.
By: R. E. Tulloss (ret)
2016-04-03 23:06:57 CST (+0800)


thanks for the update!
By: John McDonough
2016-04-03 22:16:10 CST (+0800)
We now have nrITS and nrLSU sequences for this species.
By: R. E. Tulloss (ret)
2016-04-03 21:56:49 CST (+0800)

We’re preparing the sequences for submission to GenBank. The initial (left-hand or 5’ motif) for the nrLSU gene is in the same unusual group as A. "penetratrix," A. "myrmeciae," A. "minnesorora," A. drummondii, and a few other taxa. These are not all deeply rooting species.

Curious group.

Very best,


Thank you, John.
By: R. E. Tulloss (ret)
2015-12-12 05:22:34 CST (+0800)

That’s useful data.

Very best,


Mixed hardwoods
By: John McDonough
2015-12-12 04:30:22 CST (+0800)

typical of the southern Missouri Ozark uplift.
Mainly Oaks and Hickories (Post Oaks and Pignut Hickory will account for the majority) with sparsely scattered native Shortleaf Pine mixed in along with about any other deciduous tree of the eastern woodlands you can name.
Most of the oaks are White Oak species; over the last few decades Armillaria sp. have all but destroyed the local Red Oaks.
The soil is a mixture of dark topsoil with red clay and rocks underneath and a sandy/rock hardpan deeper down. Top layer of the forest floor is rich with decaying organic matter.

OK, John.
By: R. E. Tulloss (ret)
2015-12-12 04:05:05 CST (+0800)

What specifics can you supply regarding the trees and type of soil?

Very best,


Feel free to use any of the photos you want
By: John McDonough
2015-12-12 03:50:02 CST (+0800)
and also ask any question regarding the area where I found these.

I will be on the lookout for fresh ones this coming summer.
Have a great day!

We have started to construct a page for this collection on the WAO web site.
By: R. E. Tulloss (ret)
2015-12-12 02:24:11 CST (+0800)


It’s skeletal at the moment.

We’d like to use some of your images on the page. We’re not finished with DNA sequencing of your material; however, we did find that the nrLSU has initial string (used commnly for identifying the end of the nrITS locus and the beginning of the nrLSU locus). In section Vaginatae (and the rest of Amanita) we were quite used to seeing the string TTGACCTCAAATCA in this position. However, this year we have been surprised to find TCTGACCTCAATCA in several species of section Vaginatae. We’re in the process of submitting theses sequences to GenBank. Some of the species with this motif are penetratrix, penetrans, myrmeciae, minnesorora. It looks like there are at least six others in the US and Australia.

This is a very interesting collection. I’d like to no more about its colors, dimensions, habitat, etc.

Very best,


Very good.
By: R. E. Tulloss (ret)
2015-10-24 07:36:38 CST (+0800)

I hope to have taxon pages for 209351 and 209352 on the WAO site in the not too distant future.

Very best,


By: John McDonough
2015-10-24 07:13:37 CST (+0800)
Thanks for your response, John.
By: R. E. Tulloss (ret)
2015-10-24 06:38:19 CST (+0800)

Do you feel that the images on this page (other than the comparison photo) accurately represent “sp-MO05”?

Very best,


Yes sir, the final picture shows both
By: John McDonough
2015-10-23 23:57:57 CST (+0800)

209351 and 209352 side by side for comparison with the ruler for a size reference. Both found on the same day, same hike, same geographic location with about a mile of trail separating them. Both where growing alone in the woods.
I was collecting species of Chanterelles that day and could not pass these two specimens without thinking of you. Both were kept separate of each other and from the Chanterelles while in the field using paper bags for each one. Individual field notes collected for each, then dehydrated, and sent to you.

Ooops. Typo.
By: R. E. Tulloss (ret)
2015-10-23 23:38:23 CST (+0800)

MO #209351

Very best,


I do not understand your question sir…..MO 209531 is a purple colored laccaria???
By: John McDonough
2015-10-23 21:46:42 CST (+0800)
Could the final picture include fruiting bodies of both this species and…
By: R. E. Tulloss (ret)
2015-10-21 03:13:33 CST (+0800)


See MO #209531.


By: John McDonough
2015-07-22 02:16:34 CST (+0800)

I hope the material was in good condition and will be useful.
I got to laughing when I read the following…………power outages can be a pain:)

Thanks John,
By: groundhog
2015-07-18 03:55:54 CST (+0800)

This material has been received and accessioned to Rod’s herbarium. We have scheduled it for DNA sequencing. Thanks for providing this material and collecting notes.

Appendix A2
By: John McDonough
2015-07-10 03:04:34 CST (+0800)

collecting notes filled out and material is in the dryer

The striations are very long and they are “tuberculate”…they are covered with…
By: R. E. Tulloss (ret)
2015-07-10 01:18:58 CST (+0800)

little bumps.

I think that this is the same species as the one you posted just previously. I think that these are very similar in overall form to the species I called Amanitapenetratrix” because of the very hard-fleshed umbo and the distance between the place where the buttoned form under ground and the surface of the ground (evidenced by the amount of the stem that is below the surface of the ground.

Very good stuff. I hope both collections dry very well.

Very best,


beautiful reticulation on the cap margin
By: John McDonough
2015-07-10 00:54:27 CST (+0800)

Created: 2015-07-10 00:53:45 CST (+0800)
Last modified: 2015-12-12 02:06:57 CST (+0800)
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