Observation 115810: Amanita sect. Validae (Fr.) Singer
When: 2012-08-02

Notes: Under hardwoods.

Spores globose to subglobose, amyloid after 5 minutes, with a conspicuous hilar appendage. 6 – 8 micrometers.

Herbarium specimen in the Amanita 2012 bag.

Images

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Spores 1000x

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks again, Alan.
By: R. E. Tulloss (ret)
2012-12-03 11:41:52 CST (-0600)

Rod

do your Mexican colleagues
By: Debbie Viess (amanitarita)
2012-12-03 10:57:29 CST (-0600)

have the ability to run DNA at University?
Did someone do a macro-description on this species before it got dried?

Sounds like those features are essential for a full understanding of just what this is. A small piece is only so useful, altho one can run the DNA.

Yes, I have a small piece
By: Alan Rockefeller (Alan Rockefeller)
2012-12-03 03:41:02 CST (-0600)

here in California. Most of it will be sent to Rod Tulloss.

very interesting amanita, alan.
By: Debbie Viess (amanitarita)
2012-12-02 11:38:16 CST (-0600)

the friable volval remnants on the cap are certainly in keeping with other members of section validae, despite a superficial resemblence to say farinosa.

hope that you brought back a piece of this, at least.

Check the underside of the partial veil in both cases.
By: R. E. Tulloss (ret)
2012-11-05 15:36:41 CST (-0600)

The underside is gray with black material on the underside of the margin. A greater lengthening of the stipe in my photo has spread the gray powder out; and it is clustered on groups of surface fibrils. The specimen from Tlaxcala (of which I don’t think I have a photo) was very, very dark and more like your material. The lack of morphological data in what I have posted so far is crippling. I will see what I can do to better it. More material is probably the fundmental need. I have an offer to sequence the DNA of all Mexican material in my herbarium, which I am going to take up. This will be a help in some cases. It is highly unlikely that short collecting trips spread over about 8 years will produce a definitive collection considering the biodiversity of Mexico. The project has to be a bigger one with more players in Mexico and Mesoamerica.

R

Doesn’t look like sp-18 to me
By: Alan Rockefeller (Alan Rockefeller)
2012-11-05 14:39:59 CST (-0600)

Sp-18 has a brown cap with warts, this has a gray cap with powdery UV remnants. Also Sp-18 doesn’t appear to have a bulbous stipe base.

This seems a bit like my “sp-M18”….
By: R. E. Tulloss (ret)
2012-11-05 14:23:22 CST (-0600)

for which I am posting an image from a trip over the Sierra Madre Oriental. The organism was found in Pinus Patula forest according to my notes.

http://www.amanitaceae.org?Amanita+sp-M18

Very best,

Rod

I forgot to say that this specimen is very cool looking and you got…
By: R. E. Tulloss (ret)
2012-11-05 07:16:09 CST (-0600)

a nice set of photos of it.

Rod

I collected something very much like this in Tlaxcala on my first visit there…
By: R. E. Tulloss (ret)
2012-11-05 07:15:03 CST (-0600)

and never saw it again. I believe the specimen did not survive.

I think the combined postal services of Mexico and the U.S. do not have a good record for getting material from you to me. If you’d like to keep trying, I’d love to see this collection.

R

Created: 2012-11-05 01:42:07 CST (-0600)
Last modified: 2012-12-02 14:38:49 CST (-0600)
Viewed: 81 times, last viewed: 2015-11-29 10:09:10 CST (-0600)
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