Observation 207176: Amanita sect. Phalloideae (Fr.) Singer
When: 2015-06-17

Notes: Single fruit-body growing in mixed woods.
Cap 8.0 cm across.
Spore print white and spores amyloid.
Spores ~ 6.9-9.0 X 6.0-9.0 microns, globose to subglobose.
Q(range) = 1.00-1.15
Q(avg) = 1.07 n=15
Did not see an annulus but the fruit-body was fairly old.
Also, it lacked striations on the cap.
Difficult to classify this one(?).

Proposed Names

57% (1)
Recognized by sight: Sack on the volva

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Thanks, Ron
By: groundhog
2015-07-21 11:31:50 CDT (-0400)

We have received this material and it has be accessioned into Rod’s herbarium.

Thank you, Ron.
By: R. E. Tulloss (ret)
2015-06-21 13:12:01 CDT (-0400)

As always.

Very best,


Rod; no, I just measured the spores
By: Ron Pastorino (Ronpast)
2015-06-21 10:16:47 CDT (-0400)

from the spore print.
I’ll add this one to the batch I’ll be sending out Monday.

In measuring the spores, did you notice the number of spores per basidium?
By: R. E. Tulloss (ret)
2015-06-21 08:57:19 CDT (-0400)

I think that the mushroom could be as species of sect. Phalloideae that has lost its partial veil.

So far as we know at present, the only species with two-spored basidia among the eastern North American destroying angels is A. bisporigera.

Very best,


Created: 2015-06-20 22:06:54 CDT (-0400)
Last modified: 2015-06-20 22:58:56 CDT (-0400)
Viewed: 65 times, last viewed: 2016-10-23 16:59:06 CDT (-0400)
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