Observation 59185: Amanita thiersii Bas
When: 2010-08-25
No herbarium specimen

Notes: Nice to look at, but smells awful and the flaky surface sticks to everything it touches.

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Smyrna, TN is A. thiersii central
By: Brian Adamo (adamo588)
2010-11-19 07:53:22 PST (-0800)

It’s funny how this observation has attracted so much interest. A. thiersii was the mushroom that got me interested in photographing the various fungi I run across in this area. Every year, in late summer I see tons of them while riding my bike around the Smyrna Greenway. The grassy area in front of the National Guard HQ always has fairy rings of them at about the same time that the Chlorophyllum molybdites show up in huge quantities. They also appear on the highway medians around the air base. 2009 was an especially good year for them. This year saw maybe a third of last year’s quantity. If anybody needs specimens for study next year I’ll be happy to help.



input from Anne Pringle….
By: R. E. Tulloss (ret)
2010-11-19 06:00:21 PST (-0800)

Anne sent me this link:


On this page and on its child pages are many useful pieces of information about contributing to the Amanita thiersii genome project.

Good hunting, all.

Very best,


I think this may be a first record for Tennessee
By: R. E. Tulloss (ret)
2010-11-18 18:52:44 PST (-0800)

This is cool. :-o

I’m pretty sure that this is A. thiersii. If so, it may be a first record for Tennessee. I’d like to hear from anyone who knows of a collection of this species from Tennessee that predates Brian’s report.

In case the word isn’t out, Dr. Anne Pringle’s lab at Harvard had been able to grow this species in culture (it can live on pure cellulose…grass clippings in its present major habitat…lawns) and they are looking to sequence the entire genome of A. thiersii as one of the small number of amanitas that are not mycorrhizal.

If anyone from the Kaw Valley Mycol. Soc. sees this post, it would be nice if they could post here how they packaged fresh specimens of A. thiersii to send them to Harvard. I’ll pass the existence of this observation on to Dr. Pringle in case she want to say “oh, no, no more!” or “yes, please send” or something else.

Really nice that you got the photos of this species. It is very interesting to quite a few people (including Michael Kuo at mushroomexpert.com and other folks in the mid-West states) because it seems to be spreading up the Mississippi Valley from the Gulf Coast. It’s been in Illinois (for example) for quite a number of years now.

A bunch of stuff about A. thiersii is here:


Very best,


By: Christian (Christian Schwarz)
2010-11-18 18:21:54 PST (-0800)

A very cool species.

Created: 2010-11-18 17:33:35 PST (-0800)
Last modified: 2011-03-30 10:17:33 PDT (-0700)
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