Observation 173737: Amanita vaginata (Bull.) Lam.

While I’m not at all sure that it’s the A. vaginata, it’s definitely the closest to the general idea of this species from what grows in your forest. Collected in native Scots pine forest with some young birch in undergrowth. It’s the second Amanita I’ve found in this unfruitful season (no A. muscaria yet, this is an outrage!) and it’s much smaller than usual – I know because I’ve collected this species in exactly the same spot before, and those fruitbodies were taller and had the typical stipe surface.

Volva is almost always constricted in local collections of this species, as well as in collections of Amanita “vaginata var. alba” (I’m getting a strong feeling that there are transitional forms between the two extremes here – very pale specimens of A. vaginata… or grayish A. vaginata var. alba).

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we definitely get white forms of colored amanitas here in NA as well.
By: Debbie Viess (amanitarita)
2016-12-29 10:01:41 PST (-0800)

which only differ from the colored cap amanitas by that cap color alone.

interesting that your local “vaginata” has a pinched volva. That can also occur in some of our Western NA grisettes, and not just in A. constricta! It seems to be a function of drying of the volva.

How are you anyway, Tatiana? Haven’t seen you here for a while.

Your comment about transitional forms is very interesting…
By: R. E. Tulloss (ret)
2014-08-13 04:35:30 PDT (-0700)

no matter what species this may be.

In the U.S. we seem to have white “forms” of a number of taxa in Amanita. For example, Amanita spreta (Caesareae) has caps ranging from virgate and gray to nearly completely brown with an infrequent, purely white cap.

I am not sure that we have genetic sequences from the full range of cap colors, but I will check into that. Our coverage is pretty good.

Last night, I mentioned on Danny Newman’s posting of A. virginiana that a paper on the Caesareae (phylogeography) is very near to publication in Journal of Biogeography. I particularly call attention to the large number of sequences posted to GenBank by Sanchez et al. (the paper’s authors). The ones derived from my material already have their accession numbers listed on the relevant WAO technical tabs, but the sequences themselves were not yet released by GenBank the last time I checked.

Very best,


Created: 2014-08-12 23:40:18 PDT (-0700)
Last modified: 2014-08-12 23:40:28 PDT (-0700)
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