Observation 49621: Amanita magniradix Tulloss nom. prov.

When: 2009-08-15

Collection location: Madison School Forest, Verona Township, Wisconsin, USA [Click for map]

Who: Steve Nelsen (sfnelsen)

No specimen available

You guys (M.O.) seem unneccessarily tough to deal with. I tried to post Amanita subgenus Lepidella (which is in Moser’s system), but it is not recognized. I finally got a screen that had Amanita section Lepidella on it, but it has been depricated and cannot be used. So I put it as Amanita.

Encouraged by Rod Tuloss identifying A. magniradix (59604)so quickly, I decided to post a couple of others that I found at Madison School Forest last year, to see what people think of them.

Amanita sp. in Section Lepidella, I presume. Cap covered with pale pyramidal scales that rub off easily, 7.5 cm, ragged margin, stem ~9.5 above ground, rooting at least 2 cm below ground. spores amyloid, elipt. ~8.3×4.7 microns. Did not note chlorine odor at the time. This seems to have different spores, and I do not have any idea how much the appearance of A. magniradix will change with age.

[admin – Sat Aug 14 02:02:33 +0000 2010]: Changed location name from ‘Madison School Forest, Verona Township, Dane Co. Wisconsin USA’ to ‘Madison School Forest, Verona Township, Wisconsin, USA



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By: R. E. Tulloss (ret)
2010-08-05 08:02:24 PDT (-0700)

Amanita section Lepidella is a name.
Amanita magniradix is a name.

Unless, one is proposing to reinstate the name Lepidella at the rank of genus (I hope you don’t mean to do this, and I think you don’t), you need to say Amanita sp. (section Lepidella) or, preferably, Amanita [sect. _Lepidella] sp. The Intl. Code of Bot. Nomenclature allows insertion of intermediate rank(s) in brackets for purposes of clarification. If I understand correctly, the temporary format that has developed on MO sort of fakes the sectional identification by treating as it if it were part of a species name or an author citation (I’m not clear which it is).

Once again, I want to emphasize that I have been told that the volunteer folks who bring us the wonders of MO are working on a way of formally/rationally handling ranks between genus and species.

Very best,


You can force the above name.
By: R. E. Tulloss (ret)
2010-08-04 13:23:14 PDT (-0700)


Amanita sp. (section Lepidella)


The system will complain. Click “create” a second time…that gives you an override. The name goes through. I’ve tried to fix the deprecation, but I can’t. I understand that the volunteers who make the software are working on permitting ranks between genus and species. That should solve the problem in a more general way. Right now what we have is a “workaround.”

Look on the left side of the cap in the image in which you can see the gills. I think I see a couple of mm of overhang on the cap edge above the goopy volva hanging there. I’m guessing you may have broken off the radicating part of the bulb in this particular specimen.

Very best,



Created: 2010-08-04 12:32:37 PDT (-0700)
Last modified: 2011-03-31 08:24:00 PDT (-0700)
Viewed: 58 times, last viewed: 2017-06-07 19:49:33 PDT (-0700)
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