Observation 180104: Amanita sect. Phalloideae (Fr.) Singer
When: 2014-09-25
No herbarium specimen

Notes: Medium size, cap diameter 60-70mm, afrotemperate forest with embedded pine trees.

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You might want to check out the following
By: R. E. Tulloss (ret)
2014-09-25 14:04:30 EDT (-0400)

http://www.amanitaceae.org?Amanita+strophiolata

A variety bingensis was described with a ochre spot over the disc. Whether or not there are two varieties (the type and bingensis) is an open question. E. J. Gilbert thought there was only a single species. It is interesting to note that strophiolata is supposed to be small and thin enough so that it sometimes has a striate cap margin.

I have examined the type collection of var. bingensis, but not the type collection of var. strophiolata.

Very best,

Rod Tulloss

In the second image, a striate cap margin is apparent.
By: R. E. Tulloss (ret)
2014-09-25 13:55:04 EDT (-0400)

This can happen in very scrawny specimens of sect. Phalloideae; however, it could also be an indication of membership in sect. Amanita.

Having an image of the excavated stem base would be very helpful in this case. However, it might be necessary to check the reaction of the spores to iodine (e.g., using Melzer’s Reagent).

I’m very curious to know how this would turn out. If you don’t have material from this observation, it would be interesting to know more when you find this “creature” again.

Very best,

Rod Tulloss

There is no genetic difference between a white-capped phalloides and any…
By: R. E. Tulloss (ret)
2014-09-25 13:49:18 EDT (-0400)

of the various colored-capped forms.

On the other hand, you may well have a species other than phalloides since you are in a mixed forest. There are indigineous white mushrooms apparently belonging to section Phalloideae.

I notice that the center of the cap appears to be yellowish. This may be a clue (or not).

If you have an opportunity to collect and dry material of this sort, I would be glad to take a look at the dried specimen(s) and see if some DNA can be extracted.

I should mention to you that if you find a species suggesting the European A. rubescens there are at least two possibilities in southern Africa. One appears with European trees, but appears to be genetically distinct from the European __rubescens_ that we have sequenced. The other (and I don’t know if this occurs as far south as South Africa) is Amanita rubescens var. congolensis.

Very best,

Rod Tulloss

Created: 2014-09-25 11:06:08 EDT (-0400)
Last modified: 2014-09-25 14:04:56 EDT (-0400)
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