Observation 134573: Amanita aprica J. Lindgr. & Tulloss
When: 2013-05-24
(38.8213° -120.3767° 1510m)

Notes: This group of very fresh A. aprica was found in a mixed pine/fir forest. During the course of the afternoon I found roughly 25 fruiting bodies in the area between Ice House Reservoir and Union Valley Reservoir. I have seen it here and there in 6 other trips to the Sierra this spring, yet not this prolifically.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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You’re very welcome.
By: R. E. Tulloss (ret)
2013-08-04 02:22:54 IST (+0530)


Thank you Rod.
By: Mike McCurdy (lesmcurdy)
2013-08-04 02:08:05 IST (+0530)
Mike, I think you’ll have to search MO for possible erroneous usages.
By: R. E. Tulloss (ret)
2013-08-04 01:47:34 IST (+0530)

I’m pretty sure that MO is the place where I have seen misapplications. Many were caught by MO users and corrected.

Very best,


Yes, there is some confusion
By: Mike McCurdy (lesmcurdy)
2013-08-03 23:41:20 IST (+0530)

regarding this mushroom. Is there a photo and/or description on your site of the similar mushroom that you refer to here?


There is a possibility that there is more than one thing from the Sierras that…
By: R. E. Tulloss (ret)
2013-08-03 21:12:49 IST (+0530)

has been called “aprica” in the last couple of years. I think that people may have stopped looking for the fact that the volva of aprica is extensively spread over, and attached to, the surface of the cap. A specimen with distinct, rather easily removed warts is probably not going to be aprica.


Hello, Mike.
By: R. E. Tulloss (ret)
2013-08-03 10:15:35 IST (+0530)

You can find all the collections that were involved in defining Amanita aprica listed in the “material examined” data field on the technical tab on this page:


All the sites mentioned in the original description (protolog) are presented in magenta and you will find the words “paratype,” “holotype,” and “isotype” marking the collections that were named in the orginal description. The “holotype” is the definition of the name. There need not be isotypes in general; but in the case of aprica there were several because the holotype collection was very large; and there was enough material so that parts of it (the “isotypes”) could be deposited in multiple herbaria.

A “paratype” is a collection named in the original description that is not the collection that was designated as “holotype.”

To answer your question, the collection that became the holotype and the isotypes was collected in the state of Washington:

Trout Lake, Klickitat Co.
on 28 May 1994
by Janet E. Lindgren
who gave the collection the number 94-07

The holotype is in the herbarium of the University of Washington, Seattle (WTU).

Isotypes are in the Leiden part of the National Herbarium Netherlands (L), the New York Botanical Garden herbarium (NY), Janet Lindgren’s personal herbarium, and my herbarium (with accession number 128-5).

The isotype from my herbarium was the one sequenced. We have sampled the NY isotype and it is scheduled to be sequenced.

Very best,


Rod, where did the collection
By: Mike McCurdy (lesmcurdy)
2013-08-03 02:39:22 IST (+0530)

that provided the isotype come from?

It takes a whole lot of help on this end.
By: R. E. Tulloss (ret)
2013-08-02 18:56:00 IST (+0530)

The sequencing was done at the University of Tennessee and overseen by Dr. Karen Hughes. As you probably have noticed, Naomi Goldman and Cristina Rodriguez play a large role in maintaining the herbarium, sampling for sequencing, mailing out the samples, sorting the incoming raw chromatogram data, editing sequences, creating the summary data for the WAO nrITS sublocus termini page, etc., etc. We also have a volunteer in recent months who is working with Naomi—Nina Burghardt (folks involved with NAMA and NEMF forays will recognize her name).

For the whole team, I send you thanks for your kind words.

Very best,


Thank you for following up on this Rod.
By: Mike McCurdy (lesmcurdy)
2013-08-02 11:07:59 IST (+0530)

Nice results, and fast, considering how much material you’re trying to dig out from under.

Hello, Mike. EDIT
By: R. E. Tulloss (ret)
2013-08-02 08:35:33 IST (+0530)

We received good nrITS (barcode) and nrLSU sequences today from your material. The nrLSU gene is identical to the one obtained from an isotype of Amanita aprica. The barcode genes from the two collections are 99.7% [EDITED] identical. Hence the genetics agrees with your eyes and my eyes. Your material is indeed Amanita aprica.

Very best,


Thank you, Mike.
By: R. E. Tulloss (ret)
2013-06-04 00:56:39 IST (+0530)

The material has arrived, has been accessioned in the herbarium, and is scheduled for sampling for sequencing.

Very best,


That was the easy part.
By: R. E. Tulloss (ret)
2013-05-29 09:04:56 IST (+0530)

You’re welcome.


And thank you
By: Mike McCurdy (lesmcurdy)
2013-05-29 07:36:53 IST (+0530)

for correcting the name.

Thank your for sending me this material, Mike.
By: R. E. Tulloss (ret)
2013-05-28 19:27:55 IST (+0530)


Created: 2013-05-27 11:14:52 IST (+0530)
Last modified: 2013-08-03 03:48:20 IST (+0530)
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