Observation 146275: Amanita texasorora Tulloss, Kudzma & D.P. Lewis nom. prov.



Proposed Names

30% (2)
Recognized by sight
-3% (2)
Recognized by sight: There is a dark ring around the lower stem in the dried material. This is typical of rhacopus (in eastern US) and of its sisters such as sororcula in Centeral America and Andean Colombia and ceciliae in Europe.
54% (1)
Recognized by sight: The dark ring around the lower stipe is now known to be present in a small group of taxa quite similar to the one I propose to be the meaning of the name “rhacopus.”
Based on chemical features: barcode sequence

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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As noted above,…
By: R. E. Tulloss (ret)
2014-12-28 15:43:13 CST (-0600)

the temporary code has been replaced by a provisional name.


The name is a “temporary code.”
By: R. E. Tulloss (ret)
2014-06-17 07:37:14 CDT (-0500)

In the present case, this is the first of many new taxa that I have been able to recognize from material of Texas and the U.S. Gulf Coast. That’s where the “T” came from.

Current genetic work suggests that the brown-capped species of sect. Vaginatae with volva that becomes gray to black with exposure to air, in eastern North America, are fairly numerous (maybe 8 to 10 or more); however, we are learning that two species are much more common than the others.

One of these two is Amanitasp-T01” and the other is what I take to be the provisionally named Amantarhacopus.”

First, we there is a need to obtain an agreement on the applicaton of “rhacopus” because there is a group working on fixing the meaning of that name through formal publication. Once that name is fixed, then we will know that we need a name for sp-T01.

Very best,


P.S. Current info on the present species can be found here:



I’m not a professional photographer
By: Andrew Khitsun (Andrew)
2014-06-16 22:46:16 CDT (-0500)

Seeing that this photo is taken with flash, it’s possible some parts of the cap are washed out a bit. On the other hand, the specimen below is very pallid, and unlikely so because of the flash.
I’m a bit disappointed that my species doesn’t have a name. The name you provided sounds like some sort of a paint thinner or an electrical car part :-) What’s in the name?

DNA sequencing of this material.
By: groundhog
2014-06-16 12:29:16 CDT (-0500)

We got a good “barcode” gene (nrITS) from this material, it is the farthest north collection of A. sp-T01 that we have.

By: R. E. Tulloss (ret)
2014-06-16 12:28:32 CDT (-0500)

Do you recall if the cap photos had a glare? The dark color of the lower left is typical of this species; however the extremely pallid parts of the car are atypical.

I think you’ll find that the mushrooms are back after a frost.

Very best,


Thanks Andrew,
By: groundhog
2013-11-26 13:48:25 CST (-0600)

This material has been recieved and accessioned into Rod’s herbarium.
-Naomi (working with Rod)

I finished my season couple of weeks ago
By: Andrew Khitsun (Andrew)
2013-11-21 20:17:27 CST (-0600)

Since frost killed or nearly killed most of the mushrooms (at least from the point of view of being photogenic), I stopped going out and am paying more time to processing my crops (fleshy and photo ones). I never found A.citrina so far, and generally have fewer than a dozen of Amanita species under my belt – the genus doesn’t seem to be very common here, and I tend to like Polyporaceae and Ascomycetes more than any other fungi (not to the point where I’ll fail to grab juicy Amanita when I encounter one :-)

A thought.
By: R. E. Tulloss (ret)
2013-11-21 20:00:10 CST (-0600)

I’d think that you might find a number of amanitas of section Vaginatae in aspen-spruce-fir-pine forests that could be called boreal forests. In the east, the number of Vaginatae significantly increase as you get to northern New England. The coastal boreal forest is very different from the inland boreal forest. I wonder if the Great Lakes have an impact on their surroundings? I wouldn’t be surprised to find that you don’t have very many species in sect. Lepidella…they drop off in numbers as you get into cooler temperate regions. On the Island of Newfoundland, the most interesting of the amanitas were in section Vaginatae. I’ve been sent A. banningiana from Wisconsin; so I know that there is at least one species of the Caesareae in your state. Are you still seeing any citrina-like taxa at this date in November?

Very best,


I’m happy that I could contribute to the science
By: Andrew Khitsun (Andrew)
2013-11-21 19:21:35 CST (-0600)
(and benefit by getting local knowledge in the process). I don’t encounter too many Amanita specimens around here, but want to send my finds to you in the future, just to make sure we have exact knowledge of the local species out here (if you don’t mind, of course).
Yes, we did. Thank you.
By: R. E. Tulloss (ret)
2013-11-21 04:23:47 CST (-0600)

Hello, Andrew. We are behind in our thank yous. We have received the material, and we think it is close to Amanita rhacopus.

We very much appreciate your taking the time and making the effort to send the material. Naomi and Nina, who process a lot of the incoming material are just swamped. This summer produced so much input for us. We ae dozens of boxes behind (mostly small boxes…but not all). It’s good that you asked about your material. I was able to check the herbarium database and see that it had been entered.

Very best,


I wonder if you received it, ret
By: Andrew Khitsun (Andrew)
2013-11-20 19:51:36 CST (-0600)
I got your note, Andrew.
By: R. E. Tulloss (ret)
2013-10-25 19:55:04 CDT (-0500)

We will acknowledge the receipt of the material.

Very best,

Half of the cap would work for us if it is well dried.
By: R. E. Tulloss (ret)
2013-09-23 23:03:04 CDT (-0500)

That’s a refreshing picture. Doesn’t look like downtown Milwaukee.

Very best,


I only have cap.
By: Andrew Khitsun (Andrew)
2013-09-23 19:50:16 CDT (-0500)

I saved it hoping to get spores – none came out.

Hello, Andrew.
By: R. E. Tulloss (ret)
2013-09-23 19:44:08 CDT (-0500)

This looks like A. rhacopus to me. If you can, spare some of the dried material, I would like to examine it because it would help clarify how wide a range is occupied by A. rhacopus.

Very best,

Rod Tulloss

Being lazy…
By: Andrew Khitsun (Andrew)
2013-09-23 19:42:09 CDT (-0500)

I’ll let others name this beauty, since I’m not into gilled mushrooms too much. Yeah, yeah – it’s OK to call me lazy too :-)

Created: 2013-09-23 19:27:54 CDT (-0500)
Last modified: 2017-12-29 15:32:06 CST (-0600)
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