Observation 22934: Amanita amerirubescens Tulloss nom. prov.
When: 2009-07-04
No herbarium specimen

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Eye3 = Observer’s choice
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By: R. E. Tulloss (ret)
2010-02-17 21:02:44 PST (-0800)

On the Amanita Studies website, there is a tabular key separating the rubescent species of section Validae. You can find it (a small PDF) at


[CHANGE TO COMMENT: I broke my rule about updating the old site. I cleaned up the above mentioned file about one hour after I originally posted this note. -R] There are other differentiating features as well. On the new Amanita Studies site, full macro and micro details will be available for both taxa.


Other than the speed of fading
By: Paul Derbyshire (Twizzler)
2010-02-17 15:47:36 PST (-0800)

how can the two be told apart then?

Yes, A. amerirubescens can have yellow warts…
By: R. E. Tulloss (ret)
2010-02-16 13:52:52 PST (-0800)

both on the cap and on the edge of skirt-like partial veil, etc. The yellow fades much faster than the yellow of A. flavorubens. In fact, it fades so fast that many people never see it.

Very best,


Created: 2009-07-05 08:03:39 PDT (-0700)
Last modified: 2009-07-05 08:03:39 PDT (-0700)
Viewed: 145 times, last viewed: 2016-10-25 22:02:37 PDT (-0700)
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