Observation 12335: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2008-10-11
No herbarium specimen

Notes: There is but one major problem with this specimen, which is likley an Amanita with sac-like volva. The problem: gray gills. Scales on stipe. Probable host: Western hemlock (Tsuga heterophylla). Those gray gills remain. Did not collect this, but now think maybe I should have.

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Thank you, Daniel.
By: R. E. Tulloss (ret)
2014-02-26 22:34:44 CST (-0600)

I would indeed be interested if you see it again. Vaginatae are very fragile interms of preservation. It’s really important to dry thoroughly before the specimen begins to deteriorate. It’s also important not to dry the material at too high a temperature because that can zap the DNA. So I suggest drying at around 110 degrees F.

We will also need as much help as you can give with photos and measurements. Do you have a copy of the workshop booklet that Cristina and I wrote that has some guidance on drying and note taking?

If not, email me via the MO email contact function so that I’ll have your email address and can send you the PDF.

Very best,


Thanks, Rod.
By: Daniel B. Wheeler (Tuberale)
2014-02-26 19:00:59 CST (-0600)

I figured it probably was an Amanita, but knew of no gray-gilled species from Oregon. Would you like the collection if I find it again? Seems to be a realtively early fruiter here.

Very often species of sect. Vaginatae with a weakly structure (often graying) volva…
By: R. E. Tulloss (ret)
2014-02-26 14:11:25 CST (-0600)

have gills that also turn gray.

This is very typical with the group of species in the eastern U.S. and eastern Canada that were long mistakenly assigned to A. ceciliae (aka “A. inaurata”).

An example of an eastern species with this property is depicted and partially described here:


We think that there may be quite a few similar taxa in the east that can be separated genetically (at least).

Very best,


Created: 2008-10-11 21:42:34 CST (-0600)
Last modified: 2014-02-26 14:01:43 CST (-0600)
Viewed: 33 times, last viewed: 2016-10-22 13:54:21 CST (-0600)
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