Observation 213734: Amanita “rhacopus” group
When: 2015-08-23
No herbarium specimen
0 Sequences

Proposed Names

48% (2)
Recognized by sight: Volva is a thin sheath
54% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Athena (Apfelmusser)
2015-10-02 14:02:26 CDT (-0400)

Your mushrooms have been received and accessioned to Rod’s Herbarium. Its also been scheduled to be DNA sequenced!

At least once today…
By: R. E. Tulloss (ret)
2015-08-24 14:12:42 CDT (-0400)

At least one time today expectations are justified. :)

Thanks very much.

Very best,


The spore print is white
By: Patrick Harvey (pg_harvey)
2015-08-24 14:09:53 CDT (-0400)
Thank you, Patrick.
By: R. E. Tulloss (ret)
2015-08-24 11:12:12 CDT (-0400)

I’m glad to hear that you got a spore print. When it comes to writing a description, it is valuable to know the color of a fresh spore print. I don’t like to fill in “color in deposit unknown.”

I have seen coal black warts on a species in this group that was growing in sandy soil. In that case, I felt confident that the warts were really black. Black warts can be the results of extensive infection by a dark brown hyphomycete as has been reported for A. muscaria in Europe. Another
possibility is formation of a dark necropigment in the collapsing/dying cells of the volva itself. There are probably other possiblities and/or more than one mechanism for necropigment formation, etc.

Very best,


It is in the dryer
By: Patrick Harvey (pg_harvey)
2015-08-24 09:32:43 CDT (-0400)

The soil underneath is dark loam. I have a spore print for you also.

— Patrick

Is the soil very dark? Or are the black warts produced by time and exposure?
By: R. E. Tulloss (ret)
2015-08-23 23:01:54 CDT (-0400)

Any thoughts? I have seen very black warts on material similar to A. “xanthomitra” and on material in the “rhacopus” group. This specimen belongs in the group of taxa in section Vaginatae with graying to blackening, friable volva. If the black color is not due to something like charcoal in the soil, I would be very interested in looking at this material.

Very best,


Created: 2015-08-23 19:18:28 CDT (-0400)
Last modified: 2015-08-24 14:09:00 CDT (-0400)
Viewed: 57 times, last viewed: 2017-09-01 20:42:59 CDT (-0400)
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