Observation 170995: Amanita rooseveltensis Tulloss, Kudzma, & Wasilewski nom. prov.
When: 2014-07-22
No herbarium specimen
0 Sequences

On a sunny lawn. Stipe base/volva buried over an inch below the surface.

The splitting of the stipe surface is something I have previously seen with this type.

“Old species 17.”

Proposed Names

92% (2)
Eye3 Eyes3
Based on chemical features: nrLSU and adjacent ITS2 fragment

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Splitting of the stipe surface can happen with many species.
By: R. E. Tulloss (ret)
2017-05-23 16:58:56 EDT (-0400)

It would make sense that the splitting is cause by moisture and completion of expansion after a dry spell in mid-expansion at of the fruiting body.

Very best,


When rooseveltensis is removed from the “sp-17 group,” I think that what is…
By: R. E. Tulloss (ret)
2017-05-23 16:57:07 EDT (-0400)

…left is noticeably darker, browner, and a bit larger on average. I can’t wait to try to get some of the macro- and micro- data online for rooseveltensis…along with some of our images.

Very best,


By: Dave W (Dave W)
2017-05-23 13:31:29 EDT (-0400)

It occurred to me while trout fishing this morning that I need to review a bunch of “old species 17” posts and propose rooseveltensis whenever appropriate.

Last summer I submitted similar material collected at Tuscarora State Park, PA; obs 245397. I just reviewed these, and I think there are some potential differences from rooseveltensis. For one, the volval sac is thick/persistent compared to the rooseveltensis collected in my yard. But the broadly ellipsoid spores fit. So the work continues… to establish morphological ranges.

Happy day.
By: R. E. Tulloss (ret)
2017-05-23 12:29:49 EDT (-0400)


We got another one.
By: R. E. Tulloss (ret)
2017-05-23 12:28:24 EDT (-0400)

The DNA (large gap in nrITS and good nrLSU with a fragment of ITS2 attached) is just like we’ve seen in the other three specimens from NJ and eastern PA. This is really solidifying a unique picture of the ribosomal DNA for rooseveltensis.

Very best,


Thanks Dave,
By: groundhog
2014-09-16 12:24:27 EDT (-0400)

We have recieved this material and accessioned it to Rod’s Herbarium. We have scheduled it for DNA sequencing.

Created: 2014-07-23 14:41:20 EDT (-0400)
Last modified: 2017-05-23 13:26:02 EDT (-0400)
Viewed: 80 times, last viewed: 2017-10-16 23:30:11 EDT (-0400)
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