Observation 112001: Amanita citrina f. alba
When: 2012-10-02
(47.5° 8.5° 2342m)
Who: Sporulator
No herbarium specimen

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Recognized by sight
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Recognized by sight

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For a clarification…
By: R. E. Tulloss (ret)
2012-10-03 01:30:39 CEST (+0200)

When Schaeffer published Agaricus citrinus, the name had already been published (for a different species) 2 years earlier (1772) by Gunnerus. Hence, at the time that Lamarck recombined Schaeffer’s Agaricus bulbosus as Amanita bulbosa it was the correct name for the entity many people since Quelet have call Amanita citrin var. alba. Since no one disagrees that the yellow-capped and white-capped taxa belong to a single species (whether or not they segregate them as varieties), the issue of the correct name for that species has to do with priority. Amanita bulbosa (Schaeff.) Lam. was published in 1783. Amanita citrina (Schaeff.) Pers. was published in 1797. The recombination by Persoon is thought to be the first in Amanita. Hence, the name of the species is Amanita bulbosa. Some people don’t like this. They can petition the Nomenclatural Committee to conserve the name citrina if they wish to do so. They may be able to make a case for conservation.

Gerhard and I are using two different names for the same species. The type of bulbosa is white; the type of citrina is yellow.

The basidiomes with white and yellow caps are either in separate varieties or, in a commonly held current view, they are mere pigmentation variants of a single species.

I don’t know which is true. I would be very interested in molecular data supporting either (or neither) of the views.


By: Gerhard Koller (Gerhard)
2012-10-02 23:29:20 CEST (+0200)

I do not know about an Amanita bulbosa for I do not separate Amanita citrina. For me this clearly is Amanita citrina, at best its white variety fo. alba.
Odor should be a bit like potatoes that lie in the basement for some time. Rather unpleasant but not strong.
They pop up everywhere right at the moment, also in the Austrian Alps and in lower regions where I find it more often in deciduous or mixed forests.

Then I think you may have Amanita bulbosa.
By: R. E. Tulloss (ret)
2012-10-02 22:30:31 CEST (+0200)

If you are in the camp that separates the white- and yellow-capped varieties, then you would apparently have Amanita bulbosa var. citrina.


Having collected this species in Europe only a small number of times, I hope that one of the European participants on MO will say something about the identification of this species.


By: Sporulator
2012-10-02 21:32:01 CEST (+0200)

When I picked the mushroom this morning, it was pure white. Now, after several hours in the refrigerator, the color of the cap has changed to slightly yellow-greenish. The whole mushroom has a slightly radish-like odor.

How about an odor? [edited]
By: R. E. Tulloss (ret)
2012-10-02 21:09:32 CEST (+0200)

Do you detect any odor? Especially in the region of the bulb? And is the color of the cap’s surface (below the bits of volva) a slightly greenish yellow as appears in one of your recently added photographs?


What a pity; however, there is a goodly portion left behind…
By: R. E. Tulloss (ret)
2012-10-02 21:07:23 CEST (+0200)


By: Sporulator
2012-10-02 20:49:41 CEST (+0200)

Unfortunately the bulb was destroyed by maggots and slugs.

By: R. E. Tulloss (ret)
2012-10-02 20:09:27 CEST (+0200)

Can you add an image of the bulb?

Very best,


Created: 2012-10-02 19:52:41 CEST (+0200)
Last modified: 2012-10-02 23:29:44 CEST (+0200)
Viewed: 107 times, last viewed: 2016-10-22 18:47:49 CEST (+0200)
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