Observation 138924: Amanita ravenelii (Berk. & M.A. Curt.) Sacc.
When: 2013-07-07
(37.8205° -90.2425° )

Proposed Names

29% (2)
Recognized by sight: Not this. See Dr. Tulloss’ notes.
86% (3)
Eye3 Eyes3
Recognized by sight: Fibrils radiating in all directions from warts indicates A. ravenelii

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Hello, Patrick. EDITED
By: R. E. Tulloss (ret)
2013-07-26 20:17:24 IST (+0530)

We’re going to post some images of warts on dried material. Cristina has a nice shot from your largest specimen. Our interpretation of the large specimen is that the hyphal layer in the bottom of the wart and which connects the bottom of the wart to the pileipellis has gelatinized (where exposed to the elements) in the center of the cap; however, it is distinctly present away from the center of the cap (which is where Cristina got her best shot). Away from the center of the cap the hyphal layer looks very typical (of ravenelii).

We also dug out some older specimens of daucipes and are planning to photograph the warts on these (dried) specimens. Since the remnants of the volva on the cap of daucipes can take a large variety of shapes, we don’t have the expectation that the shots of the daucipes warts will have the same diagnostic value as the shots of the ravenelii warts.

This is one interesting summer for learning about amanitas.

Did you see the Amanita radiata that tmethyl observed in Florida? That’s one I never thought I’d see.

Very best,


Possibly mixed
By: Patrick Harvey (pg_harvey)
2013-07-26 19:43:38 IST (+0530)

I did not find these, but they looked the same. I packed the smaller
ones together in my last package, the largest one is separate.

Fibrils! They looked very smooth, so I did not look closely with
a hand lens. I’ll change the name, and separate the smaller ones
out into another observation if they turn out to be A. daucipes.
Let me know.


By: R. E. Tulloss (ret)
2013-07-26 03:34:42 IST (+0530)

the collection is mixed?


All three of us looked at the large cap under the dissecting scope.
By: R. E. Tulloss (ret)
2013-07-26 03:33:48 IST (+0530)

Cristina took a close up photo of the cap surface. The fibrils are there.
I was surprised because I didn’t expect that from your photos. Naomi will get back to you further on the material next week.

Very best,


There are no fibrils under the warts
By: Patrick Harvey (pg_harvey)
2013-07-26 01:16:02 IST (+0530)

The cap is smooth … A ravenelii has fibrils under the warts. See this detail of the warts on another observation of Amanita ravenelii: http://mushroomobserver.org/image/show_image/52491?obs=23904&q=1OLOZ

Created: 2013-07-07 20:40:00 IST (+0530)
Last modified: 2013-07-26 19:44:10 IST (+0530)
Viewed: 71 times, last viewed: 2016-10-24 14:06:09 IST (+0530)
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