Observation 19637: Amanita nehuta G.S. Ridl.

When: 2009-03-20

Collection location: Kaipara harbour, Auckland, New Zealand [Click for map]

Who: Michael W (Michael Wallace)

Specimen available

Found under Leptospermum scoparium and Cyathea dealbata in lowland New Zealand scrub.


Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Inflated cells of the universal veil. Scale divisions=2.5 microns.
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael
Copyright © 2009 Michael

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Add Comment
Images 39818 and 39819 are typical of what I would expect.
By: R. E. Tulloss (ret)
2009-03-22 12:42:43 PDT (-0700)

I don’t have a perfect memory of what I saw in the material from Kew, but I noticed that Ridley or another author had said the cells appeared incrusted. That would seem to apply to the two images I mentioned in the summary to this comment.

The dark colored cell content is also typical of the species that share distinctive characters with A. nehuta. Amanita farinosa of eastern N. Amer. and Central Amer. being one of the most familiar to me.


P.S. Looking forward to seeing the specimens!

Inflated cells,
By: Michael W (Michael Wallace)
2009-03-21 23:32:41 PDT (-0700)

Hi Rod,
I added some images of the inflated cells I found, are these the cells you mean?
The two specimens in the first image are drying and I will save them for you!

Maori dust under the microscope…
By: R. E. Tulloss (ret)
2009-03-21 07:02:54 PDT (-0700)

Thank you, Michael, for these neat photographs.

When I examined some of the original material of A. nehuta that was deposited in Kew, I found that the inflated cells of the universal veil had what appeared to be warts all over their surfaces. I’m very interested to know if decorated volval cells really occur in all specimens or if I was seeing some sort of artifact of preservation (or something else…). Can you send me one or more documented specimen(s) that matches up to one (or more) of your photographs?

I’m really enjoying seeing the advent of New Zealand amanitas on MO.

Very best,


By: Michael W (Michael Wallace)
2009-03-21 04:23:50 PDT (-0700)

Maori Dust Amanita, thats a great common name, this Amanita seems to be quite small, with a pileus 20-45mm in diameter, although the descriptions I have read say 25-65mm in diameter I very rarely see any specimens with a cap 65mm.

fabulously detailed photos; love that fluffy gray ring at the top of the bulb!
By: Debbie Viess (amanitarita)
2009-03-21 01:31:38 PDT (-0700)

this is an amazing looking amanita for section amanita; Rod calls it the Maori Dust Amanita for its powdery gray universal veil…so poetic!

Created: 2009-03-20 22:28:49 PDT (-0700)
Last modified: 2012-05-22 09:48:05 PDT (-0700)
Viewed: 153 times, last viewed: 2018-11-06 15:27:03 PST (-0800)