Observation 110845: Amanita sect. Phalloideae (Fr.) Singer
When: 2012-09-22
No herbarium specimen

Proposed Names

5% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: pkjo (pkjo)
2012-09-24 19:33:12 CDT (-0400)

Thanks for very helpful links:) I haven’t test it with KOH but I guess I should. There is still so many things to learn! However I didn’t see any sign of cream or pinkish color on the cap – it was pure white.

Amanita ocreata is thought to be restricted to …
By: R. E. Tulloss (ret)
2012-09-22 23:07:04 CDT (-0400)

California, Oregon, and maybe Baja California.

Did you have a particular reason for using the name on this material? Did you try a drop of KOH solution on the cap?

Recent discoveries mentioned on MO in the last week or so are making the white destroying angels in the east a little harder to deal with…at least for the moment. It seems there are more of them than we thought.

Folks in southern China (particularly folks working in or with Dr. Yang’s Lab in Kunming, Yunnan Province) have started to sort out their white destroying angels. Artificially speaking they have the same groupings as we do (but different species)…subglobose spores vs. ellipsoid spores and KOH turning the surface tissues yellow or not turning them yellow. If we can take a tip from their results, we should also be paying attention to color changes over the center of a white cap and differences in the organization of the cap’s surface structure.

Some of their relatively new taxa are




http://www.amanitaceae.org?Amanita+subjunquillea+var.+alba (note: possibly a good species on its own)


Very best,


Created: 2012-09-22 22:09:15 CDT (-0400)
Last modified: 2012-09-22 23:07:29 CDT (-0400)
Viewed: 46 times, last viewed: 2017-06-14 04:10:55 CDT (-0400)
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