Observation 26418: Amanita magniradix Tulloss nom. prov.
When: 2009-10-08
Herbarium specimen reported

Notes: This Was growing under Red Oak and Hickory. At first thought it to be A. bisporigera But it looked a bit different. I dug it up and it has a tapering stipe that measures 18 in. only 5 in protrudes through the ground the rest being buried. Ends in a taper. Reminds me of an Xerula stipe but not so woody very spongy soft.The cap is 4 in across having small scale or powdery substance that is easily displaced by handling. gills close white has a very large skirt. Spore print white. I have consulted Rod Tollose Study of Amanita but have not found anything even close to this, A similar one was found in the Area it is Observation #25789 on MO. It to looked as if it had a very long tap root type stipe but it broke off leaving the majority in the ground. This time i carfully dug up the entire specimen.

Images

59919
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Other Views
59930
Other Views
59931
Other Views
59932
Other Views
60131
I placed specimen in a glucose solution to get it to open up fully and get a spore print Spores Are amyloid sub globulose,
60132
I placed specimen in a glucose solution to get it to open up fully and get a spore print Spores Are amyloid sub globulose,
60133
I placed specimen in a glucose solution to get it to open up fully and get a spore print Spores Are amyloid sub globulose,
60134
Better view of skirt and gills.
60135
Better view of skirt and gills.
60136
Better view of skirt and gills.

Proposed Names

21% (2)
Eye3
Recognized by sight
Based on chemical features: negative KOH
ret
91% (2)
Eye3 Eyes3
Recognized by sight: See my comment.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Amanita magniradix?
By: R. E. Tulloss (ret)
2009-10-09 20:29:24 PDT (-0700)

On the right hand side of image 60135, I think I see a sterile extension of the cap beyond the ends of the lamellae; there is certainly a deeply radicating stipe base; and the spores (though out of focus and/or not in lateral view) have length/width ratio (in some cases at least) exceeding 1.6. On these grounds, I suggest Amanita magniradix Tulloss nom. prov. a species possibly related to A. rhopalopus in sect. Lepidella. The spores for which I computed length/breadth ratio had such ratios between 1.54 and 1.62 (ellipsoid to elongate). I recently posted some information about length breadth ratios on some observations by Ron Pastorino.

R.

Any Idea’s
By: Eddee (eddeeee)
2009-10-08 21:42:47 PDT (-0700)

Any one have a clue as to what kind of Amanita this could be.?

Created: 2009-10-08 18:08:02 PDT (-0700)
Last modified: 2009-10-08 18:08:02 PDT (-0700)
Viewed: 77 times, last viewed: 2016-09-28 11:17:08 PDT (-0700)
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