Observation 133530: Amanita nauseosa (Wakef.) D.A. Reid

Proposed Names

56% (4)
Recognized by sight
-53% (4)
Recognized by sight: Darker cap center makes it more likely to be L. magnispora vs L. clypeolaria.
24% (5)
Recognized by sight: Could still be one of those stinky Lepidella in subsection Vittadiniae or something!
62% (3)
Recognized by sight
Used references: amanitaceae.org, M.O.#119823
Based on chemical features: Smells terrible.
5% (2)
Recognized by sight: new genus for saprobic amanitas in section Lepidella
Used references

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
This material looks pretty good.
By: R. E. Tulloss (ret)
2013-05-24 10:18:46 CDT (-0500)

It looks like you’ve hit on a method for protecting material from FL humidity.


By: Benjamin Dion (benjamindion)
2013-05-24 10:08:26 CDT (-0500)

I have hundreds of species dried with spore prints… all of which are vacuum-sealed and in a refrigerator.

cheers from sunny SWFL

Your material has been received.
By: R. E. Tulloss (ret)
2013-05-24 09:36:53 CDT (-0500)

Very nice heat seal on the plastic bag. That ought to keep these critters dry!

Thanks for your special efforts.

Very best,


You’re welcome.
By: R. E. Tulloss (ret)
2013-05-15 20:32:20 CDT (-0500)


I learned more
By: Josh M.K. (suchen)
2013-05-15 20:15:48 CDT (-0500)

from that single post than in my entire mushroom hunting career. Wow!

It’s neat to see the pinkish coloring of some gills. (EDITED)
By: R. E. Tulloss (ret)
2013-05-15 11:32:43 CDT (-0500)

This is mentioned in the original description.

Cristina and I spent several minutes looking along the gill edges at high magnification, and we have the impression that part of the “serration” is due to a thick marginal layer of lamella edge cells. The latter appears to be whiter than the gill surfaces. Check an area in which light is coming through the gill and look for a dividing line between the pinkish or orangish white gill and the white lamella edge cells. Also at least much of the serrated edges are clearly “fluffy” at highest magnification of the photos.

The marginal region of the cap surface that I mentioned last night really is worth looking at (again at highest magnification). Not only do you see the radial fibers of the universal veil, but you also can see the “cedar shingles” effect of the volva…the outer edge of the shingle is thicker and is colored after drying. This pattern is very typical of many of the volvas on caps of many species in Amanita subsect. Vittadiniae. Its also probably a part of the reason why so many of the species in the subsection were originally described as Lepiota species. This happened to A. nauseosa. It was originally described as Lepiota nauseosa.

How do you know that this shouldn’t be in Lepiota? Well, check out the “about” pages on WAO:

For example,

http://www.amanitaceae.org?About+Amanitaceae and



Posted the full description that I have at present except for microanatomical drawings.
By: R. E. Tulloss (ret)
2013-05-15 00:07:02 CDT (-0500)


Detailed macroscopic description of nauseosa posted.
By: R. E. Tulloss (ret)
2013-05-14 22:32:12 CDT (-0500)
The address is…
By: R. E. Tulloss (ret)
2013-05-14 22:30:09 CDT (-0500)

R. E. Tulloss
Herbarium Rooseveltensis Amanitarum
P. O. Box 57
Roosevelt, NJ 08555-0057

Thank you.

For the select few :) following discussion of the present species: I just noticed that despite having a number of genes sequenced for A. nauseosa, there is only one sample of the nrITS (the proposed “bar code” gene) listed on WAO. It would be nice to get more examples if possible.

Very best,


Just tell me where to send em
By: Benjamin Dion (benjamindion)
2013-05-14 22:17:54 CDT (-0500)

I have 1 cap, 2 stems (w/ basal mycelium and soil on them), and 2 spore prints.

Completely dried and ready to go if you want em

I went to an unpublished description of A. nauseosa that has never been put on…
By: R. E. Tulloss (ret)
2013-05-14 22:12:49 CDT (-0500)

WAO (it is very long) and checked the issue of a partial veil. This is what I found:

“Stipe: 90–220 × 10–25 mm, narrowing downward or roughly cylindric, often flaring at apex, unpolished to subfibrillose, longitudinally striate, whitish at first, becoming colored like pileus and often becoming yellowish to brownish yellow to yellowish brown [e.g., Ochraceous Buff (1YR 8.0/6.0)] to brown from handling, sometimes deeply inserted in substrate; bulb very small or absent; context white, sometimes with yellowish stains as in pileus context, solid; partial veil thin, ample and submembranous to membranous in nature, very weakly submembranous in Botanical Garden material (even then continuous over lamellae at first, then as small patches on pileus margin), apical to subapical, pallid at first (at least in “button” stage), often tearing during expansion of pileus and leaving dingy yellowish fragments on stipe apex and pileus margin, sometimes largely left on stipe and then hanging like ragged skirt, eventually disappearing entirely, fibrillose beneath, with edged slightly thickened by universal veil material; universal veil often pulverulent-floccose and densest on upper stipe where protected under partial veil for greatest time during stipe elongation, pallid at first (at least in “button” stage), brown on exposure and darkening on handling, on lower stipe as scattered fibrils and not easily noticed.”

It sounds like it is time to get this information on the web after about 12 years of fiddling with my Ms. in private. I’ll post the techtab macroscopic description tonight.

Sorry, if I introduced confusion on this observation. I’ll leave the earlier posts for what information they may contain. If people would like anything removed, let me know.

Very best,


Here are two additional suggestions of primitive amanitas with a partial veil. EDITED.
By: R. E. Tulloss (ret)
2013-05-14 21:55:33 CDT (-0500)

1) Amanita thiersii – can have coarse warts over the cap center, but this is not common. Odor indistinct at first, unpleasant in age. Not known for a strong staining reaction on the cap and volva:


2) Amanita manicata – one report from Florida (I have not seen the material, but the report was based on molecular study). This species, when fresh, looks like it has a soft furred, brown animal curled around the stipe below the partial veil…a very distinctive character. Odor described as sweet and unpleasant. Quite possibly introduced to Florida from south Asia or Pacific Islands with soil on imported plants.:


Neither seems to fit the description of the awful odor of the present species…except that the photos show a fruiting body that appears pretty much mature (aged…at least a bit).

I see there is one specimen. May I look at it?

If the answer is “yes,” then make sure it is good and dry and send it expeditiously because the primitive amanitas have a strong tendency to suck water out of the air when dried…which is not good for any hope of extracting DNA in the future.

Of course, it’s possible that it is not an Amanita; however, if it is one, it provokes curiosity.

Very best,


Take a look at the warts on the cap (particularly near the edge of the cap…
By: R. E. Tulloss (ret)
2013-05-14 21:20:01 CDT (-0500)

on the first photo at the highest magnification available. Note the radial structure of the volva. This is typical of the most primitive amanitas in Amanita subsect. Vittadinii because the volva is composed of radially oriented, elongate, sausage-like cells. The volva arises directly from the cap’s flesh…there is no intervening “skin.” Many of the primitive (basal) amanitas are not mycorrhizal and, as was recently shown by research of Ben Wolfe at Harvard, can live on nothing but grass clippings (or pure cellulose). Amanita thiersii is another example of subsect. Vittadinii or those in the middle of the U.S. Amanita nauseosa ranges around the Caribbean and the Gulf of Mexico and, like A. thiersii, has been found as far north and east as Balitmore, Maryland in the recent past.

Some of the species of sect. Vittadiniae are among the worst smelling amanitas. Given the color change visible in the middle of the cap and the locality of the collecting site, A. nauseosa is a good shot at a determination except for the rather well-formed partial veil…which would be unusual.

[ http://www.amanitaceae.org?Amanita+nauseosa ]

Very best,


Check out
By: Josh M.K. (suchen)
2013-05-14 15:14:30 CDT (-0500)

this little number: observation 119823

got Meltzers?
By: Debbie Viess (amanitarita)
2013-05-14 11:05:58 CDT (-0500)

check your spores for amyloidity. If they turn blue, well then you have yourself a lepidella amanita.

Walt: I sometimes see those serrated gills in western amanita species, too. If it is a lepidella, then the UV is quite friable and doesn’t always stick around on the stipe base. It does tend to come off on fingertips, though! ;)

Could be a stinky lep, or just a rotting mushroom, or maybe a combo of both!

By: Benjamin Dion (benjamindion)
2013-05-14 10:34:58 CDT (-0500)

These smelt horrible!!!! Still do. I’m currently bagging up the completely dried herbarium sp and damn I need to wash my hands again!!!

They were also very sticky and would leave a disgusting residue on my fingers…

Spore print white. I have both spore print and dried herb sp in my library.

Hope that helps.


Serrate gills
By: walt sturgeon (Mycowalt)
2013-05-13 18:18:28 CDT (-0500)

are interesting. I don’t see a volva or volval remnants.

Did these
By: Josh M.K. (suchen)
2013-05-13 15:25:43 CDT (-0500)

things smell nasty as all hell?

Created: 2013-05-12 22:38:30 CDT (-0500)
Last modified: 2018-01-02 16:21:08 CST (-0600)
Viewed: 294 times, last viewed: 2018-04-06 20:11:53 CDT (-0500)
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