Observation 93338: Amanita texasorora Tulloss, Kudzma & D.P. Lewis nom. prov.

I just got out of the dentist an hour ago, spotted this guy from the road and had to stop. I am having problems searching sources to pin down an ID, I know I have found this Amanita sp. before but cannot recall what it is. Meds from dentists are making it hard to focus.

Found under oak, I could not dig up the bulb because of some bug damage to it. Also note the striated cap margin.


Close up of the volval tissue on the pileus.
This is the best photo of the base of the stipe I could get, the bulb was below the soil and I could not dig it up. This part was just above the soil line.
Another picture of the base.
Another picture of the patchy warts.

Proposed Names

36% (2)
Recognized by sight
-58% (2)
Recognized by sight
47% (2)
Recognized by sight: See comments below. This species shows a number of characters similar to taxa with graying gills and graying volva in section Vaginatae.
63% (2)
Based on chemical features: recognized by nrITS sequence
82% (1)
Based on chemical features: “texasorora” is a replacement for “sp-T01” as progress is made toward pulication of the species.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Can’t stay away.
By: R. E. Tulloss (ret)
2014-12-24 11:30:08 CST (-0500)

For those following the Amanita taxa that used to be called “ceciliae” in eastern North America: We now have established that dark brown to somewhat orangish tan to tan to grayish tan and intermediate tones can occur both in “texasorora” and “rhacopus.” This is something we wouldn’t have known without photographs and DNA from more than three dozens specimens (combined) of the two taxa. We couldn’t have done that so efficiently without our correspondents who participate in MO.

Thank you all very much.

We hope your holidays treat you well and that the coming year will be healthy and productive for you and yours.

Very best,

The Roosevelt Amanitaceae team

Thank you.
By: R. E. Tulloss (ret)
2014-12-22 14:25:54 CST (-0500)


By: AmatoxinApocalypse (AmatoxinApocalypse)
2014-12-22 14:05:28 CST (-0500)

Use anything you need.

Happy Holidays.


Hello, Timothy.
By: R. E. Tulloss (ret)
2014-12-22 09:03:56 CST (-0500)

Since the pileus color in these photographs differs from that in other photographs of what genetically appears to be a single species, I’d like to include some of your images on the WAO website. The originals here will be cited with a link to this observation.

Very best,


Genetic sequencing indicates that this material belongs to A.sp-T01.”
By: R. E. Tulloss (ret)
2014-10-07 11:18:08 CDT (-0400)

Because of the color of the cap and the light color of the volval remnants on the cap, this must have been a rather youn specimen when photographed. The species is usually darker.

Thank you for the material, Timothy.

Very best,


When I discovered that my name borealisorora applied to the same species as that
By: R. E. Tulloss (ret)
2014-02-19 22:37:06 CST (-0500)

provisionally name rhacopus by Yves Lamoureux, I switched to his name to honor his contribution to North American study of amanitas.


Thank you.
By: R. E. Tulloss (ret)
2012-06-20 10:54:47 CDT (-0400)

The material has arrived and is being cataloged. Seeing the dried material with the volva having become quite dark, indicates that this is close to (if not identical with) A. borealisorora.

Very best,


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-04-27 10:26:52 CDT (-0400)

I agree with Herb, thank you Rod.

Your info has opened many doors for me, I have learned much, thank you.

You’re welcome.
By: R. E. Tulloss (ret)
2012-04-27 10:15:18 CDT (-0400)

I’m trying. Mushroomobserver seems (to an old guy like me) to offer occasional teaching opportunities. That’s why I’m forming the habit of asking questions first before I make pronouncements. If it takes several steps to get to a suggestion of a possible identification, then there is more opportunity for the poeple who are following the sequence of comments, namings, etc. to go away with something that they can use in another case.

When I asked a question to Dr. Bas at the beginning of a visit with him in Leiden, he would sometimes say, “I have to think about that. I’ll tell you before you leave.” And the day before I left, he would sit me down and give me a beautiful explanation without notes or illustrations. I admire that approach tremendously, but most of my life I have been (and still am) too likely to just open my mouth and start blabbing. Going slow seems to me to be a better method for more certain transmittal of better quality information.

Thanks for your comment.


By: Erlon (Herbert Baker)
2012-04-27 01:37:36 CDT (-0400)

Rod, your comments are very helpful here.

In the fourth image… [edit]
By: R. E. Tulloss (ret)
2012-04-26 21:54:09 CDT (-0400)

there is an apparent “strangulate” zone below the gray patch on the stem. This zone is typical of ceciliae-like taxa such as A. sororcula and A. borealisorora. It is further evidence of your material’s falling into that group.

[edit 4/27/2012] It also suggests that you got most of the base of the stem. :-)


By: R. E. Tulloss (ret)
2012-04-26 20:53:17 CDT (-0400)

Just wanted to point out that I edited the comment while you were responding to it.


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-04-26 20:49:41 CDT (-0400)

yes of course

That’s good. [edit]
By: R. E. Tulloss (ret)
2012-04-26 20:46:39 CDT (-0400)

Could I take a look at it?

The photos have an orange tint to the brown on the cap. Was that present?

Without the tint, this might be A. borealisorora. That provisional species ought to be in your area, I have specimens from NC, SC, TX, etc. that seemed to be borealisorora in the field although I haven’t checked them microscopically. (That’s what the olive color means in the material examined data field on the techtab here:

http://www.amanitaceae.org?Amanita+borealisorora .)

Also, notice the form and texture of the gray patches on the cap in photos on the brief tab for that same species page.


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-04-26 19:53:34 CDT (-0400)

Yes I collect all Amanita sp. I find, its dried and sitting in front of me now.

Gray. [edit]
By: R. E. Tulloss (ret)
2012-04-26 16:42:35 CDT (-0400)

Graying gills and graying, submembranous volva are a character of taxa that are otherwise also morphologically similar to species such as Amanita borealisorora and A. sinicoflava (among taxa with the characters of interest in eastern North America. I’m more inclined than ever to consider this to be a species in sect. Vaginatae. I’ll propose that after I finish this note. Did you happen to collect and dry this material?

I would suggest excavating a cylinder of soil with the stem entirely inside it. Then take away the dirt from around the stem and return it to the whole that you left.

Very best,


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-04-26 14:08:24 CDT (-0400)

I could not tell if it had a bulb or not, the soil was very compact. I have a harder time getting whole specimens out of the ground if they do not have a well pronounced bulb.

Check out the color of the gills upon drying, is the color change upon drying normal for Amanita fulva?

It just has cap colors that are fulva-like.
By: R. E. Tulloss (ret)
2012-04-26 08:20:51 CDT (-0400)

My point was that it is not Amanita fulva in someone’s sense. I’m waiting to hear from Tim before I make up my mind, but it looks like it could be an undescribed species.


How do you feel about the colors in these pics? [edit x2 ]
By: R. E. Tulloss (ret)
2012-04-25 21:41:34 CDT (-0400)

I’m seeing an orangish brown or brownish orange cap that suggests Amanita amerifulva except for the fact that the universal veil appears to be submembranous and very distinctly graying (so it can’t be amerifulva). The bottom shot seems to show the latter very clearly, as does the shot of what looks like the base (or near the base) of the stem (next to last shot).

You said the bottom of the stem broke off. Do you have a feeling of whether it was bulbous or lacked a bulb?


Created: 2012-04-25 20:44:28 CDT (-0400)
Last modified: 2017-12-29 16:24:11 CST (-0500)
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