Observation 58025: Amanita sect. Vaginatae sensu Zhu L. Yang

When: 2010-11-01

Collection location: Lebanon, Linn Co., Oregon, USA [Click for map]

Who: Britney Ramsey (Riverdweller)

No specimen available


Copyright © 2010 Britney

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Add Comment
By: R. E. Tulloss (ret)
2010-11-04 23:34:03 CST (-0500)

The volva of A. pachycolea is very robust, the sides of the sack could even be called “fleshy” in large specimens. Except (perhaps) in old, senile specimens, I don’t think they could be said to come apart. Also the cap of A. pachycolea often has a distinct dark ring around the inner ends of grooves that mark the edge of the cap.

There are at least partial draft descriptions for a few of the species of section Vaginatae of the PNW that lack formal names on the new Amanitaceae site:


A description for A. pachycolea can be found at


A description for A. constricta can be found at


Based on the dried material in the Univ. of Michigan herbarium, A. H. Smith was familiar with several more taxa of sect. Vaginatae from your region that are not named and, apparently, not commonly found.

Very best,


The base was
By: Britney Ramsey (Riverdweller)
2010-11-04 23:13:53 CST (-0500)

a membranous clingy vulva and as I dug down to it, it came apart. I was thinking of pachycolea, but really not sure.

Very nice picture
By: R. E. Tulloss (ret)
2010-11-04 23:12:00 CST (-0500)

Very nice.

Do you have a shot that shows the bases of the stems?

Very best,


Created: 2010-11-04 22:54:29 CST (-0500)
Last modified: 2012-06-06 17:39:21 CDT (-0400)
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