Observation 138823: Amanita “sp-amerirubescens07” Tulloss crypt. temp.

At first I thought this was an example of brunnescens. Spores are broadly elliptic.

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Based on chemical features: sequences from two genes (nrITS and nrLSU).

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Rod, sorry for the very tardy reply…
By: Dave W (Dave W)
2016-01-17 19:39:35 CST (-0600)

but I just now saw your questions.

I believe the spores seen in the photo were the result of taking a print. It’s generally not difficult to get an Amanita to give up some spores, so I rarely need to mount Amanita gill material in order to see spores.

Thornhurst is a township in PA. The MO location map is accurate as to the general area where this mushroom was found.

Some questions.
By: R. E. Tulloss (ret)
2014-07-18 12:02:43 CDT (-0500)

Did you see a spore print?

I can’t find Thornhurst on the map. Is that a designation for the particular segment of the St. For.?

Very best,


Thank you, David.
By: R. E. Tulloss (ret)
2014-07-18 08:06:06 CDT (-0500)


I don’t recall the exact spot…
By: Dave W (Dave W)
2014-07-17 23:30:09 CDT (-0500)

where this was collected. But I can offer some generalities.

This is a typical acidic Pocono plateau environment. 30-50 year old maple, beech, birch growth interspersed with coniferous plots. The coniferous areas feature native hemlock, pine, and planted Norway Spruce. These areas also have some birch mixed in with the conifers.

I think this probably came from a coniferous area. I spend most of my time at this location hunting Boletus edulis.

No oak.

David, can you tell me anything about the ecology of the collecting site?
By: R. E. Tulloss (ret)
2014-07-17 21:40:04 CDT (-0500)

Very best,


For the second collection of “Amanita sp-amerirubescens07_”….
By: R. E. Tulloss (ret)
2014-07-17 21:16:52 CDT (-0500)

see observation #147255 from Eric Smith.


The cap color will be helpful here I think.
By: R. E. Tulloss (ret)
2014-07-17 21:12:08 CDT (-0500)

We got DNA sequences back for this collection recently. The sequences were new to us. I’m not sure that I can tell you how many rubescent taxa there are hiding under my presumptuous name “amerirubescens”. At the moment this will get the temporary code name Amanita sp-amerirubescens07."

We will certainly want to use your photos to illustrate the new page when we get it in order.

We have at least one other collection of this species—-from Oneida Co., New York.

Thanks again.

Very best,


Thanks Dave,
By: groundhog
2013-07-25 11:24:44 CDT (-0500)

This material has been received, accessioned into Rod’s herbarium, and scheduled for sampling.

Created: 2013-07-06 14:23:28 CDT (-0500)
Last modified: 2017-12-29 10:54:51 CST (-0600)
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