Observation 219402: Amanita sect. Phalloideae (Fr.) Singer
When: 2015-10-16
No herbarium specimen

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I think this may be what I’m provisionally calling …
By: R. E. Tulloss (ret)
2015-10-17 09:09:30 PDT (-0700)

__A._ “amerivirosa.”


We have several collections with what appears to be consistent DNA sequences. Large size, positive yellow reaction to KOH, dominantly subglobose spores, and four-spored basidia seem to be characters that are consistent…but may not be enough to define the species.

The spore shape separates this from A. suballiacea:


The four-spored basidia separates amerivirosa from A. bisporigera:


It appears that the fruiting body of A.sp-O01” has a shorter stem in proportion to the cap width.


And the fiftheastern North American, white destroying angel of which we know from DNA studies is rather small:


We know that sp-bisporigera can become orangish or pinkish over the cap’s center; however, this character may occur in other species given the right environmental conditions.

Very best,


Created: 2015-10-16 15:16:04 PDT (-0700)
Last modified: 2015-10-16 15:16:12 PDT (-0700)
Viewed: 40 times, last viewed: 2016-10-27 18:44:28 PDT (-0700)
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