Observation 66975: Amanita amerirubescens Tulloss nom. prov.

When: 2011-05-05

Collection location: Atlanta, Georgia, USA [Click for map]

Who: Hans (Alienfan1011)

No specimen available

In the photograph it is a bit blurry with gills in the second picture, It has a musky-like scent to it. I arrived at the name because I saw the picture that looked similar to it on the website. Here is direct link to the mushroom Image that I used for comparison. It looked like a pantherina at first but I compared the images of Pantherina and Crenulata and Crenulata looked the most like it.


This is the full mushroom with a sort of egg like bottom
This shows that it has a skirt around it
This image shows how I determined the species from the other picture in my reference

Proposed Names

-66% (4)
Used references: www.eticomm.net/~ret/amanita/species/crenulat.html
-17% (3)
Recognized by sight: I can tell its in Amanita genus by the ring around it
Used references: Used my Mushroom Encyclopedia to match pics and wikipedia to match pics.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Amanita sources on the web
By: R. E. Tulloss (ret)
2011-05-07 00:17:20 WIB (+0700)

Dr. Zhu-liang Yang and I have worked for about 11 years now to create a web reference that covers many species of the Amanitaceae. It will probably never be in an ideally finished state, but its constantly being improved; and there is editorial control that is lacking for the wikipedia pages on the same subject.

Our old pages (called “Amanita Studies”) will be taken down sometime in the not too distant future. For most users, we recommend making a transition to


Very best,


Probably not the European species…
By: R. E. Tulloss (ret)
2011-05-06 23:56:23 WIB (+0700)

It’s very, very doubtful that you found the Eurasian species in Georgia, USA…unless you were in a plantation of European trees…and that’s pretty unlikely in itself.

I think a pretty good bet would be

http://www.amanitaceae.org/?Amanita+amerirubescens .

This species doesn’t yet have a valid name. There are some on MO who would prefer to call it “Amanita rubescens sensu eastern North American authors”; and there are others that would use my provisional name. As long as it is understood that we are talking about the same organism, it really doesn’t matter until a valid name is published.

Very best,


By: Hans (Alienfan1011)
2011-05-06 23:05:31 WIB (+0700)

Wow you are right it does look a lot like Amanita Rubescens

That’s a very dark cap color….
By: R. E. Tulloss (ret)
2011-05-06 10:20:34 WIB (+0700)

for A. crenulata; and the substantial partial veil doesn’t seem to fit very well either. Also, I’ve never noticed a particular scent associated with crenulata. I’m inclined to see if there isn’t another alternative.

How do you feel about the colors as they show up on MO? Are we seeing what you saw with the naked eye? I’m thinking that this could be one of the species that is commonly called A. rubescens in North America.

How about this one: < http://www.amanitaceae.org/?Amanita+amerirubescens >?

If you get a spore print, you might try to use part of the spores to check for the amyloid reaction. You should not get the amyloid reaction with crenulata which belongs to subgenus Amanita. The rubescens-like taxa, on the other hand belong to subgenus Lepidella and will give an amyloid reaction in an iodine solution…like tincture of iodine or Melzer’s Reagent.

Rod Tulloss

Taking Spore Print
By: Hans (Alienfan1011)
2011-05-06 10:19:35 WIB (+0700)

I’m taking a spore print for final verification.

Created: 2011-05-06 09:52:29 WIB (+0700)
Last modified: 2017-11-11 05:58:39 WIB (+0700)
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