Observation 156945: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2014-01-01

Notes: I have collected and dehydrated all three specimens. They were growing in the exact center of an 8-foot diameter clearing among tall pines (likely slash pine), live oak, and dense saw palmetto. I thought at first they were just abused Amanita “amerirubescens” or similar, but I couldn’t find any red staining. Nor could I find an annulus on any of the three including the pin. Also, both the mature specimen and the immature cap showed short striations which I hope comes through in the photos. Any thoughts?

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Hello, Josh.
By: R. E. Tulloss (ret)
2014-03-25 12:39:08 PDT (-0700)

This material is accessioned in our herbarium. We are scheduling it for sequencing. The volval material has turned gray with a little aging and drying. Hence, this species is probably in the ceciliae group. I suspect it will be a new species.

Very best,

Rod

Thanks for
By: Josh M.K. (suchen)
2014-01-02 14:38:57 PST (-0800)

clearing that up, Dr. Tulloss. I had never personally collected Vaginatae with warts as thick and densely distributed as these. Though I should have realized I was looking at something in that section. The two more mature specimens were indeed well on their way to rotting. I will send off the young specimen to you.

The stem in the last picture…
By: R. E. Tulloss (ret)
2014-01-02 14:14:19 PST (-0800)

seems to be totally elongating, and most of the volva seems to have been carried up on the cap and to turn gray with age.

I think the largest specimen is decaying in the images.

I’d put this somewhere in sect. Vaginatae perhaps near taxa such as A. rhacopus and A. sinicoflava and their ilk.

I doubt that we will have too much luck getting normal spores from this material; however, we might get DNA from the smaller specimens. I think it would be worth a try.

If you can send me what you can spare of the collection (at least a longitudinally split half of one of the younger specimens), I can see what we can do about sequencing it. We are building up a nice collection of sequences from the weakly structured volva group of the Vaginatae; so we have some good data for comparison.

Very best,

Rod

Looking back…
By: Josh M.K. (suchen)
2014-01-02 13:49:31 PST (-0800)

These appear to have sack-like volvas as well which may preclude anything from section Validae. Interesting.

Created: 2014-01-02 13:42:13 PST (-0800)
Last modified: 2014-01-02 14:15:18 PST (-0800)
Viewed: 39 times, last viewed: 2016-03-18 19:54:53 PDT (-0700)
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