Observation 82599: Amanita sect. Amanita

When: 2011-11-14

Collection location: Nevado de Toluca, Mexico, Mexico [Click for map]

Who: Alan Rockefeller (Alan Rockefeller)

No specimen available

Under Abies and Pinus.



Proposed Names

49% (2)
Eye3 Eyes3
Recognized by sight
-21% (3)
Recognized by sight
Used references

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
The universal veil in crenulata is pulverulent..
By: R. E. Tulloss (ret)
2011-12-15 06:09:12 PST (-0800)

and the bulb rather than having a rather robust, upstanding limb, has the pale tan powder of the volva on the bulb’s shoulder and sometimes the remains of a submembranous white, thin internal volval limb against the base of the stipe. So I don’t think this is crenulata. There really isn’t any known species very close to crenulata. So I don’t think there are candidates to make up a group. If this species is in sect. Amanita (about which I’m unsure, see below), I think it might be closest to the gemmatoid group.

Here’s a page based on an extensive study of A. crenulata:



Striate margin
By: Alan Rockefeller (Alan Rockefeller)
2011-12-14 23:06:01 PST (-0800)

It was very dry that day and hadn’t rained for a week, so I would discount the striate margin. The base did’t seem like Phalloideae to me. The elevation was near 3000 meters.

some other arguments, but pros & cons seem to balance…
By: R. E. Tulloss (ret)
2011-12-14 20:18:44 PST (-0800)

I also noted the following: striate cap margin (but that might be caused by in situ drying), truncate short gills (but these are present in some members of the Phalloideae), stem base surrounded by thick limb of volva (very thick for Phalloideae, but might reflect relation to the gemmatoid group).

So I also see possible indicators of sect. Amanita, but they seem to be balanced by doubts.

Abies and Pinus means you were at rather high elevation if I remember…maybe near 3000 m? Not that that will help much, both sects. Amanita and Phalloideae could be at that altitude in the area of the observation I think.


Cap color
By: Alan Rockefeller (Alan Rockefeller)
2011-12-14 19:57:14 PST (-0800)

Cap color is represented pretty well in the first photo – A yellowish brown slightly darker than I would expect for A. gemmata.

I called it section Amanita due to the warts on the cap, annulus and bulbous base but I wouldn’t be surprised if it was from another section. The base of the stem had a lot of organic material stuck to it which made it hard to see the exact form of it. I should have done a cross section.

By: R. E. Tulloss (ret)
2011-12-14 19:24:08 PST (-0800)

Do you have a feeling for what the original color of the cap was?

Could you run through the points that brought you to the decision to suggest sect. Amanita?


Created: 2011-11-15 10:54:05 PST (-0800)
Last modified: 2012-06-06 13:28:06 PDT (-0700)
Viewed: 126 times, last viewed: 2018-07-15 23:37:49 PDT (-0700)
Show Log