The habitat was primarily Bishop pine and there were many Amanita pachycolea and some were quite large.
This young one stood out because of the heavy volval patch on the cap.
It also had very distinctive spores which seemed distorted.
A curiosity which I thought worth recording(?)
Cap was 17.0 cm as measured across the cap surface.


Spores in Congo red + 1% KOH @ 1000X.
Spores in Congo red + !% KOH @ 1000X.

Proposed Names

23% (2)
Recognized by sight
60% (2)
Recognized by sight: too many diffs to call it pachycolea.

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Add Comment
ah, the grisette nightmare!
By: Debbie Viess (amanitarita)
2015-12-09 00:45:31 CST (+0800)

yeah, no lie, we have a lot of grisette diversity out here, without a lot of clarity on just who is what.

Shall we start with the DNA and work backwards? When we are done, will we still be unable to tell these things apart in hand?

who knows?

Nice project for a west coast grad student, though.

I wonder about the cap color variation in material attributed to pachycolea.
By: R. E. Tulloss (ret)
2015-12-08 21:41:10 CST (+0800)

I think it would be a good idea to collect a wide variety of material and to see what genetic and other variations could be identified. The Vaginatae seem to be incredibly diverse and the species hypotheses need to be very thoroughly tested. In the east we are finding what seems to me to be significant genetic variation within what were considered in the very recent past to be single species. Of course this is true of some species not within the Vaginatae; however, the Vaginatae have been so under explored that it is not surprising to see the increase in complexity.

Very best,


Created: 2015-12-08 12:19:39 CST (+0800)
Last modified: 2015-12-09 01:42:21 CST (+0800)
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