Observation 222162: Amanita sect. Phalloideae (Fr.) Singer
When: 2015-11-08
Herbarium specimen reported
0 Sequences

Notes:
Under mixed hardwoods.

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Eye3 = Observer’s choice
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Comments

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When I saw that the partial veil was largely unbroken in the dried material,…
By: R. E. Tulloss (ret)
2017-06-05 17:54:24 PDT (-0700)

…I was worried that there would be no spores. However, the “trick” of looking for mature spores on the upper part of a gill near the stipe worked. As one would expect, the spores are amyloid.

The spores are largely globose to subglobose. This eliminates virosiformis, sp-F13, longitibiale, suballiacea, and the elliptosperma group. The thin membranous (not felted) partial veil eliminates magnivelaris. The fact that I could only find 4-spored basidia eliminates bisporigera.

A rough shot at spore size/shape would be 8.4 – 9.5 × 7.7 – 8.8 microns, with Q = 1.06 – 1.11.

The specimens is small for amerivirosa, but size is very variable as you know. The spore size is small for amerivirosa; but this might be due to immaturity.

Besides amerivirosa, you still have sturgeonii (at present known from NJ and OH), and sp-bisporigera05 (at present known from NJ and TN) as possiblities. Amanita amerivirosa has been sent to me from Georgia recently (McIntosh County). All three are found in the sandy NJ Pine Barrens where we do find Murrillian taxa originally described from Florida. So I think you have (at least) three candidates. Nevertheless, it would be worth further checking of the spores.

I will add amerivirosa to your regional checklist.

We have not gotten to the sequencing of this specimen yet.

Very best,

Rod

Any update?
By: Sarah Prentice
2017-06-05 13:08:25 PDT (-0700)
Material
By: Athena (Apfelmusser)
2015-11-20 12:11:06 PST (-0800)

Hi!

We’ve received your package, and the mushrooms have been accessioned into RET’s herbarium.

Thank you!!!
Athena

Dried material
By: Sarah Prentice
2015-11-16 14:37:57 PST (-0800)

en route to Dr. R. E. Tulloss.

Hi Rod
By: Sarah Prentice
2015-11-09 14:23:32 PST (-0800)

I’m happy to send you a specimen. I’ll send an email for more details.

Could you spare a part of the dried material?
By: R. E. Tulloss (ret)
2015-11-08 19:25:10 PST (-0800)

As you know I’m looking for the white Phalloideae species have unusual spores size-shape (including those described by Murrill). An example would be A. virosiformis. Also, we have found that there are some “late season” destroying angels of modest size in states to your north. I’d interested in pursuing more information about these (possibly distinct) taxa also.

Very best,

Rod

Hi Rod
By: Sarah Prentice
2015-11-08 19:10:23 PST (-0800)

The fruiting body was about 9 cm in height.

Hello, Sarah.
By: R. E. Tulloss (ret)
2015-11-08 19:05:26 PST (-0800)

Can you give us a feel for the size of the fruiting body?

Very best,

Rod

Created: 2015-11-08 14:52:41 PST (-0800)
Last modified: 2017-06-06 22:37:57 PDT (-0700)
Viewed: 127 times, last viewed: 2017-06-21 00:59:39 PDT (-0700)
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