Observation 47078: Amanita Pers.
When: 2010-06-18
Who: karode13
No herbarium specimen

Notes: An unusual Amanita found growing at the base of a Eucalyptus amongst litter. I am unsure of the name but one picture I can find of a similar looking one is tagged with the name Amanita grisella.

Proposed Names

33% (2)
Eye3
Recognized by sight
60% (2)
Recognized by sight
ret
81% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
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Comments

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I hope you have the luck to find it again.
By: R. E. Tulloss (ret)
2014-06-30 02:29:27 SAST (+0200)

Very best,

Rod

Unfortunately
By: karode13
2014-06-27 23:52:00 SAST (+0200)

I haven’t found this particular one since. I should be in that area again soon and will take a look to see if any are around.

just saw this way cool amanita!
By: Debbie Viess (amanitarita)
2014-05-27 17:57:08 SAST (+0200)

and read your comments, Rod. You might want to change the word amyloid to inamyloid in your below paragraph. Just a spelling error, but a confusing one!

did you ever find more of these? I would be curious as to where they fell out, too!

By: R. E. Tulloss (ret)
2010-07-31 22:06:44 SAST (+0200)

Unfortunately, the name Amanita grisella is very poorly understood. Check the brief description on the Amanita studies site.

D. A. Reid revised this species in 1980:

Reid. 1980. Austral. J. Bot., Suppl. Ser. 8: 27, fig. 15(a-b), 61.

Given the known information, I think A. E. Wood’s 1997 revision may actually describe a different mushroom.

Rod

One question is…to what section does this taxon belong? …EDITED to correct typo…
By: R. E. Tulloss (ret)
2010-07-31 21:56:05 SAST (+0200)

Very interesting! Thanks for posting these images.

There seems to be a distinct bulb on the stem. This eliminates three sections (Caesareae, Vaginatae, and Amidella).

I think that I can see a thin, membranous limb of volva sticking up from the left side of the bulb at the point at which stem and bulb join (in the fifth picture to the right). If I am correct in my interpretation of the image, this characteristic eliminates sect. Validae.

If the species has INamyloid spores, it would be in sect. Amanita, probably relatively “close to” Amanita umbrinella (which has a much darker cap). Placement in section Amanita might gain a little support from the fact that the short gills of the present entity seem to be truncate (squarely cut-off), but this supposed “rule” (inamyloid spores go with truncate short gills) has so many exceptions that I don’t trust it very much. It seems to me that amyloidity of spores is best checked by checking spores with Melzer’s Reagent, not by checking the shape of the short gills.

If the spores are amyloid, then we are left with sections Lepidella and Phalloideae. The second of these sections is well known for the limbate volva on the stem’s basal bulb. The first of the two cited sections also contains a few known species that have limbate volvas. Moreover, such, limbate-volva’d species of sect. Lepidella are known from Australia.

It would be wonderful if a specimen of this taxon could be recovered from the field and thoroughly/carefully dried for study…especially since Dr. Elaine Davison (in Perth) is presently working on some Australian species in both the “possible” amyloid-spored sections in which the present critter might belong.

Very best,

Rod

Created: 2010-06-18 06:46:22 SAST (+0200)
Last modified: 2010-07-31 21:45:57 SAST (+0200)
Viewed: 96 times, last viewed: 2016-04-24 00:23:31 SAST (+0200)
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