Observation 49412: Amanita sect. Caesareae Singer
When: 2010-07-23
No herbarium specimen

Notes: Amanita banningiana…??

Proposed Names

56% (1)
Recognized by sight
81% (1)
Recognized by sight: Although the volval sac is not shown in the images, the long-striate cap margin, the umbonate cap, the pigmented partial veil, free gills, and the remains of colored tissue on the stem surface are all common in the provisional stirps Hemibapha of Amanita section Caesareae. I am not certain whether I have ever seen this taxon before. I am uncertain how to allow for color-changes with aging…which can be important for species determination in the group in question. The above notes are NOT a definition of any taxon. They are merely “rules of thumb” that I used in judging the “gestalt” of the present illustrations. Technical definitions are an entirely different matter and may (especially in the present case) involve states of microscopic characters. Sometimes I have noticed “rules of thumb” being mistaken for technical definitions on MO. — R

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Amanita banningiana is restricted to eastern North America.
By: R. E. Tulloss (ret)
2010-07-31 14:30:29 EDT (-0400)

So far as is known, Amanita banningiana is restricted to eastern North America. There is NO KNOWN CASE of a species of Amanita sect. Caesareae being present in more than a one well-defined range of a single continent. In other words, all known taxa of the section (including provisionally described taxa) are endemic species. If this current species is to be found outside of northwestern India, it is most likely to be found in the once contiguous Fagaceae-Pinaceae-Dipterocarpaceae forest(s) stretching from at least NW Pakistan to the Kamchatka Peninsula with a “branch” of the range extending down into peninsular (and possibly insular) southeast Asia.

In my opinion, the use of European and North American guidebooks and other literature has been more of a problem than a help in terms of species determination in southern and eastern Asia. This has been true historically in northern India up until very recent times. The best single monographic resource for the region is the 1997 thesis of Yang (in German) for the amanitas of SW China. The publications by Yang and his colleagues from the Kunming Institute in Yunnan Province, China since the mid-1990s are the work most relevant to India. The species Amanita concentrica and A. subglobosa were described from India by Semwal et al. For an overal summary of all regional taxa, see the brief descriptions posted on the current Amanita Studies website. The new Amanitaceae web site will have many of these taxa described in detail…once the new site has gotten to its “1.0” release.


Created: 2010-07-31 13:39:32 EDT (-0400)
Last modified: 2012-06-06 17:41:41 EDT (-0400)
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