Several fruitings observed, all sharing the features seen/described here.

Growing in a field (mowed path along margin) 20-25 feet from a forest consisting mainly of mature oaks, hemlock also present.

Stipe base and membranous volva partly buried.

Cap leaden-gray.

Stipe pure white, covered in small white floccose scales.

Spores broadly ellipsoid to subglobose, 8-12 × 7-8.5.


Proposed Names

92% (2)
Based on chemical features: nrLSU sequence derived by Dr. Kudzma

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= Observer’s choice
= Current consensus


Add Comment
Nice work, Rod and Linas.
By: Dave W (Dave W)
2017-07-10 19:06:47 CDT (-0400)

I remember this one. The fruit body was larger than my previous rooseveltensis observations. I thought this would pan out as this species.

Good nrLSU sequence derived.
By: R. E. Tulloss (ret)
2017-07-10 08:23:46 CDT (-0400)

Thanks again for the material and your continued support.

Very best,


The robust persistent volva…
By: Dave W (Dave W)
2017-05-23 21:35:44 CDT (-0400)

is different than the A. rooseveltensis that I find on my lawn. But other than this one trait, this mushroom and its habitat are very similar to rooseveltensis.

Herbarium Rooseveltensis Amanitarum (R. E. Tulloss) has received specimen.
By: mcmacher
2017-03-16 14:58:39 CDT (-0400)

We have received the dried specimen and it is being accessioned for Rod’s herbarium. Thank you very much.

Yup, most of the spores I observed…
By: Dave W (Dave W)
2016-07-26 00:55:55 CDT (-0400)

were with Q~1.3. Habitat similar to the “old species 17” I find in my yard every summer. The fruit bodies in this observation (and the other from the same habitat) were quite large.

Q of about 1.3.
By: R. E. Tulloss (ret)
2016-07-26 00:48:43 CDT (-0400)

That is in the range of the broadly ellipsoid average spores of “old 17.” Is it one species or more than one? I still don’t know.

Very best,