This gray variety has spores which are subglobose to broadly elliptical… and a few elliptical.


Proposed Names

92% (2)
Recognized by sight
Based on microscopic features: Spore Q.

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We have a good sequence for this and it is Amanita rooseveltensis.
By: R. E. Tulloss (ret)
2020-09-23 22:37:53 CDT (-0400)

As usual we can’t derive an nriTS sequence; but we have linked a terminal fragment of ITS2 to a large chunk of nrLSU. So we have a very good match to previous sequences from rooseveltensis.

Thank you for your continuing generosity. As you know your collections have strongly aided the research in the Roosevelt herbarium.

Be safe.

Very best,


I did not take notes on habitat for this.
By: Dave W (Dave W)
2017-05-23 14:37:33 CDT (-0400)

But looking at other mushrooms I posted from this foray, I surmise the area is likely an oak/hickory dominated mainly hardwood forest.

Hello David,
By: R. E. Tulloss (ret)
2013-05-02 12:32:13 CDT (-0400)

The spores that we can see in side view seem to be broadly ellipsoid to ellipsoid. This is probably one of the things that were called sp-17. The material has been received and accessioned in the herbarium.