Observation 106477: Amanita mutabilis Beardslee
When: 2012-08-22
No herbarium specimen

Notes: Raspberry pink stains in white context, stipe, and bulb when sliced.

Proposed Names

78% (4)
Eye3 Eyes3
Recognized by sight

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks Martin,
By: groundhog
2013-11-26 12:37:47 PST (-0800)

This material has been recieved and accessioned into Rod’s herbarium.

You’re welcome.
By: R. E. Tulloss (ret)
2012-09-14 12:04:18 PDT (-0700)

This is a cool species. When you look at spores in mutabilis, try to intentionally break some basidia when you’re using Melzer’s reagent. Often particles come out of the basidia that become reddish in Melzer’s…lots of them. This character is very, very rare in Amanita. I hope you see it.

Very best,


Thanks for your comments,
By: Martin Livezey (MLivezey)
2012-09-14 10:54:20 PDT (-0700)

Rod. That is an interesting story. I did retain material; it is on my list to extract it from the drier and look for spores this weekend. I will send it to you after that. The other observation I made using this name has a much less gracile fruiting body. I believe that, as you have alluded, was the more common form on the weekend I found these.

These images show much more gracile fruiting bodies than I normally see. [edit]
By: R. E. Tulloss (ret)
2012-09-14 10:18:02 PDT (-0700)

The stuff in the NJ Pine Barrens has been rather large and chunky in the last two years. Prior to that, we had some years when we didn’t see mutabilis too much (at least I didn’t).

I don’t think I have pictures of gracile fruiting bodies. Did you retain any dried material?

Thirty years ago, when I first saw it, it was like a chunky specimen of bisporigera until I caught the odor of licorice when it came out of the refrigerator. I had read Bas’ thesis then and was already converted to Amanita; so I cut a sliver off the exterior of the stem and was blown away with the intense red-pink reaction. Later I compared material from New Jersey and Florida and found that Murrill’s subdivision of the species didn’t hold up. Clark Rogerson helped me write my first publication in a refereed journal (for Mycologia). When Dr. Bas came to New Jersey for the 1984 NEMF, the first thing he said to me at the airport was that he had read that little paper. I’m sure I got very confused and embarrassed. I think I said something like, “I promise I’ll do better than that.” I was not quite 40, just a kid. [edit]

Very best,


Thanks Rod
By: Martin Livezey (MLivezey)
2012-08-23 19:13:51 PDT (-0700)

They are everywhere. I am amazed at the subtle but obvious pink – raspberry is not a bad descriptor – pale as spring beauty…,

All right.
By: R. E. Tulloss (ret)
2012-08-22 19:27:05 PDT (-0700)

They are definitely coming out of the woodwork in Delaware.


Created: 2012-08-22 17:48:23 PDT (-0700)
Last modified: 2013-11-26 12:47:30 PST (-0800)
Viewed: 79 times, last viewed: 2016-10-22 13:47:03 PDT (-0700)
Show Log