Observation 202637: Amanita marmorata Cleland & E.-J. Gilbert
When: 2015-04-11
No herbarium specimen

Notes: Possible Amanita sp, Medium size, cap diameter 45mm, mottled light-brown cap, white stalk and volva, between grass in eucalyptus plantation.

Proposed Names

28% (1)
Recognized by sight
44% (2)
Recognized by sight: Description, habitat, and region seem to fit.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Your dried material and spore print and documentation arrived in today’s post.
By: R. E. Tulloss (ret)
2015-05-18 08:59:34 PDT (-0700)

Thank you very much, Liz.

This should be very helpful in our studies. I’ll keep you up to date.

Very best,


I’m very glad to hear about the color intensifying. Thank you for the email.
By: R. E. Tulloss (ret)
2015-04-12 12:37:24 PDT (-0700)

Does the cap retain the marbled appearance in your material? Do the increase and brownish coloring and the grayish coloring both refer to spots that are not white in the original photos?

Very best,


Recent images of marmorata from New South Wales, Australia…
By: R. E. Tulloss (ret)
2015-04-12 07:06:27 PDT (-0700)

have been posted by Ian Dodd and Lucy Albertella on MO.

DNA sequences from Lucy’s patch of marmorata provided us with the DNA linkages to both South Africa and Hawaii.


Hello, Liz and David.
By: R. E. Tulloss (ret)
2015-04-12 07:01:10 PDT (-0700)

I’d go with David’s suggestion. My hesitation is with the very faint pigmentation in the cap. I’m using Mary’s computer because mine is in the shop this weekend (rats).

Liz, could you tell me if the pigmented areas get grayer or browner with age?

I recently was able to compare DNA from A. reidii (South Africa), A. marmorata (NSW, Australia), and the subspecies of marmorata described from Hawaii, USA. The morphology says they are all the same species. The DNA is very strongly supportive of that idea.

The proper name would be A. marmorata as it is the oldest available name. The mushroom contain amatoxins (as in A. phalloides).


I don’t know whether public health officials or mycological societies post areas in which deadly mushrooms occur in SA. The effort is spotty in the U.S. It would be worthwhile advising your local poison control of the existence of a deadly Amanita in the region of your collecting locality. In the US, poison control is organized on a state by state basis; however, that doesn’t mean that SA would do it the same way.

In SA literature, A. marmorata has been called “phalloides.” A list of synonyms appears on the following webpage near the top of the “technical” tab:


There is also lots of other info that may be of interest on that webpage.

It is fairly clear that A. marmorata was exported as a symbiont on the roots of Australian plants. How many different plant species are involved is not known. Eucalyptus is certainly one such.

Since A. phalloides has been known to jump hosts when exported, it is possible that A. marmorata might be able to do the same thing. So a watch should be kept to see if marmorata appears with other ectomycorrhizal trees…whether imports (e.g. European oaks or pines) or endemic African trees.

Please, be careful. And, please, if you have the time, let me know what you can learn from observing this mushroom over time.

Very best,


Created: 2015-04-11 07:51:11 PDT (-0700)
Last modified: 2015-04-12 12:37:37 PDT (-0700)
Viewed: 84 times, last viewed: 2016-10-25 09:13:57 PDT (-0700)
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