Observation 214898: Amanita rhacopus group
When: 2015-08-30
No herbarium specimen
0 Sequences

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38% (2)
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54% (1)
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I knew this one might be a good one
By: Matt Welter (mattfungus)
2015-08-31 09:19:40 CDT (-0400)

I also need to go back to having my gps on and available so when I find these I can go back and refind them.

Unfortunately, the place I found this one was a 45 minute drive from my location and I don’t think I can justify the gas and going back out there to my wife on the chance that I kinda know where it is and that I might be able to find it.


Next time I will make sure that I have both a collection bag and full batteries in my gps.

Of the three sample species I listed in the previous comment,…
By: R. E. Tulloss (ret)
2015-08-31 08:09:59 CDT (-0400)

only Amanita texasorora is known from Wisconsin. Since the dominant species of the group in eastern Canada appears to be A. rhacopus, you might also have that species in Wisconsin. Material like that shown in these photos belongs in the group because, while a member of Amanita sect. Vaginatae, it has a volva that turns gray and easily breaks up into flat patches on the cap.

Very often, there is a non-graying, cup-like piece of volva remaining on the base of the stem (sometimes somewhat hard to see), and a graying or blackening ring of volva (not a skirt-like ring) is often found a little bit above the bottom of the stem. This dark ring persists after drying the a specimen.

I’ve been working on this species group for some time and a specimen like the one depicted here would be one on which you could try out the drying method you mentioned to me.

Very best,


Matt, good morning. >>>EDITED URLs
By: R. E. Tulloss (ret)
2015-08-31 07:57:57 CDT (-0400)

At the moment, we need DNA to separate some of the taxa in this group.

You can see three of the species in the group here:




Very best,


Created: 2015-08-31 06:56:04 CDT (-0400)
Last modified: 2015-08-31 07:55:52 CDT (-0400)
Viewed: 37 times, last viewed: 2017-09-26 08:20:17 CDT (-0400)
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