When: 2014-06-29
Collection location: Fort Crowder Conservation Area, Neosho, Missouri, USA [Click for map]
Notes:
Oak and hardwood forest.
Images
| User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote. | |||||||||
| Vote | Score | Weight | Users | ||||||
|---|---|---|---|---|---|---|---|---|---|
| I’d Call It That | 3.0 | 0.00 | 0 | ||||||
| Promising | 2.0 | 0.00 | 0 | ||||||
| Could Be | 1.0 | 5.68 | 1 | (watchcat) | |||||
| Doubtful | -1.0 | 0.00 | 0 | ||||||
| Not Likely | -2.0 | 0.00 | 0 | ||||||
| As If! | -3.0 | 0.00 | 0 | ||||||
| Overall Score sum(score * weight) / (total weight + 1) |
0.85 | 28.34% | |||||||
| User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote. | |||||||||
| Vote | Score | Weight | Users | ||||||
|---|---|---|---|---|---|---|---|---|---|
| I’d Call It That | 3.0 | 0.00 | 0 | ||||||
| Promising | 2.0 | 9.44 | 2 | (amanitarita) | |||||
| Could Be | 1.0 | 5.68 | 1 | (watchcat) | |||||
| Doubtful | -1.0 | 0.00 | 0 | ||||||
| Not Likely | -2.0 | 0.00 | 0 | ||||||
| As If! | -3.0 | 0.00 | 0 | ||||||
| Overall Score sum(score * weight) / (total weight + 1) |
1.52 | 50.78% | |||||||
| User’s votes are weighted by their contribution to the site (log10 contribution). In addition, the user who created the observation gets an extra vote. | |||||||||
| Vote | Score | Weight | Users | ||||||
|---|---|---|---|---|---|---|---|---|---|
| I’d Call It That | 3.0 | 4.48 | 1 | ||||||
| Promising | 2.0 | 0.00 | 0 | ||||||
| Could Be | 1.0 | 0.00 | 0 | ||||||
| Doubtful | -1.0 | 0.00 | 0 | ||||||
| Not Likely | -2.0 | 0.00 | 0 | ||||||
| As If! | -3.0 | 0.00 | 0 | ||||||
| Overall Score sum(score * weight) / (total weight + 1) |
2.45 | 81.74% | |||||||
Comments
Add Comment
Same species, I think.
R
Amanita “semiobruta” … meaning the “half-buried” or “half-hidden” ringless amanita. Of the group, this one is more of a milk chocolate color in the center of the cap than the others.
Thanks, again.
Very best,
Rod Tulloss
was under ground. Is this correct, Jon?
Very best,
Rod
was that the taxon represented by this page has a “proposed fungal barcode” (nrITS) gene that is closest to those of Amanita “penetratrix” among the sequenced species with an nrITS sequence in GenBank or in my personal database (which contains sequences not yet posted to GenBank). However, the previously known sequences of the cited species cluster closely together (in terms of similarity)…differing from each other by a few tenths of percent. The new sequence is not in the cluster.
When one compares the new sequence to sequences from “penetratrix,” the percent difference is 2 to 2.3 %. To use round numbers, 1 percent difference can be thought of as a difference of 6 of 600 characters in an ITS sequence.
Very best,
Rod
to this observation:
http://www.amanitaceae.org?Amanita%20penetratrix
The techtab of the above page is accumulating information about some genetically related taxa in the “discussion” data field.
Very best,
Rod
We have recieved this material and it has been accessioned to Rod’s herbarium. We are scheduling it for DNA sequencing.
-Naomi
I notice the extreme prominence of the umbo. We have found (rarely) in Connecticut a species with a very prominent and hard umbo. It reminds me the similar umbo that is present on some species of Termitomyces and seems to serve the purpose of perforating a hard-as-concrete termite mound. (The weird case of the animal whose food blows up it house.)
The amanita mentioned seems to arise from a very deeply buried primordium and has to come up a long way through the soil before it breaks the surface.
If you find Vaginatae with very acute umbos such as the one in your photos, I think you should assume that the base of the stem is very, very much farther down in the grown than you might think…in larger specimens, I think may have to excavate as much as 8 inches of substrate to find the base of the stem.
If you are finding material in this group, I really would like to see it. We have had terrible luck with drying the collections that we have found to date. In once case, somebody shut off the power over night and we lost everything in the dryer…including this deeply originating critters.
Very best,
Rod
It is not something that I see commonly in my home collecting area.
Can you give me an approximation of (say) the width of the cap?
Very best,
Rod
The stipe base seems to have suffered some indignities between the picture of the stipe in the ground and the picture out of the ground. It was clearly hard to get a nice clean extraction. It looks to me as though there are some bits of gray volva on the stipe in the stipe-in-ground photo…or do you think they are just soil?
Very best,
Rod
Created: 2014-06-29 18:28:05 PDT (-0700)
Last modified: 2017-12-29 06:39:00 PST (-0800)
Viewed: 140 times, last viewed: 2019-11-26 03:24:36 PST (-0800)
Show Log
http://www.amanitaceae.org?Amanita%20semiobruta
Thanks again.
Rod