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 11:09:30 CDT (-0500)

__A._ “amerivirosa.”

http://www.amanitaceae.org?Amanita%20amerivirosa

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:

http://www.amanitaceae.org?Amanita%20suballiacea

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

http://www.amanitaceae.org?Amanita%20bisporigera

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

http://www.amanitaceae.org?Amanita%20sp-O01

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

http://www.amanitaceae.org?Amanita%20sp-bisporigera05

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,

Rod

Created: 2015-10-16 17:16:04 CDT (-0500)
Last modified: 2015-10-16 17:16:12 CDT (-0500)
Viewed: 41 times, last viewed: 2016-11-08 09:47:50 CST (-0600)
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