Observation 185846: Amanita sect. Vaginatae sensu Zhu L. Yang

When: 2014-10-23

Collection location: Russ Park, Ferndale, California, USA [Click for map]

Who: Randy Longnecker (Randy L.)

No specimen available

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That’s cool, Randy.
By: R. E. Tulloss (ret)
2014-10-29 09:40:15 PDT (-0700)

I hope you may get another chance.

Very best,


No specimen…
By: Randy Longnecker (Randy L.)
2014-10-29 08:48:49 PDT (-0700)

Sorry, wish I could send it to you, didn’t really collect anything but Chanterelles that day though.

I see that several folks in California appear to hold the same point of view. EDITED
By: R. E. Tulloss (ret)
2014-10-27 13:52:34 PDT (-0700)

Hello, Christian.

Is there a work up of morphological characters of the beige-banded critter on the web or elsewhere? The spores of pachycolea (per a fairly large sample) are rather large and might be useful for distinguishing similar taxa if we could get spore size-shape data from the organism depicted here by Randy. As you know, there is the result of a combination of the original description and a study of the holotype here:


I’m willing to look at dried material of the beige-zonate critter myself if that can be facilitated by my getting some dried material of it—-a longitudinally cut half or quarter of a fruiting body would be enough. We would also sample the material and put the sample in our sequencing queue.

I’m curious to know if something so strongly zonate is indeed within the range of variation of pachycolea.

I would never have thought of the hypothesis if you hadn’t raised the possibility.

Very best,


Color zones
By: Christian (Christian Schwarz)
2014-10-27 12:33:10 PDT (-0700)

The tan zone may not be in the original description, but it seems to me to be fairly frequent (within the range of variation) on fruitbodies I have and/or would assign to A. pachycolea.

Some examples here:
observation 157876, observation 118982, observation 5002

This species with a light beige zone between a dark brown disc…
By: R. E. Tulloss (ret)
2014-10-27 12:10:29 PDT (-0700)

and a brown zone over the marginal striations has come up earlier this season (perhaps last weak) with the “pachycolea” attached to it. I take this to be a younger specimen of the same species (whatever it may be). I don’t think this is pachycolea. There is no mention of a (very distinctive) tan zone in the original description of pachycolea.

Thanks for posting this it clarifies that the beige zone is not something that develops late in the life of an otherwise very dark capped species.

If you should happen to dry a specimen of this, I would be very interested in (say) half of the dried specimen.

Very best,


Created: 2014-10-27 11:07:04 PDT (-0700)
Last modified: 2014-10-27 11:07:18 PDT (-0700)
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