Observation 146288: Amanita chrysoblema G.F. Atk.

When: 2013-09-23

Collection location: Ottawa, Canada [Click for map]

Who: Jonathan M

No specimen available

all the specimen here where very pale and some pure white.

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By: Jonathan M
2013-09-24 17:25:58 CDT (-0500)

I will possibly go in that forest next week to collect some, (1 hours in a bus then 30 minute in the wood! but worthy it a beautiful forest!).

those seem odd as they did have a slight cream color especially at the center of the cap. but since they grow in thick forest i doubt they where bleached by the sun

Hello, Jonathan.
By: R. E. Tulloss (ret)
2013-09-24 08:47:51 CDT (-0500)

Here’s what we can do with white collections of muscaria-like taxa in North America.

For about 5 years, we’ve know that in eastern North America, the white and yellow muscaria like taxa appear to be the same species as the red-capped species in the Rockies and and westward to the Pacific, northward into southern Alaska, and southward into Costa Rica (at least). The problem has been to find the correct name for the species (or if there is none, create a name). At the moment, we know that Amanita muscaria var. persicina (mostly in the SE U.S.) is a distinct species. That leaves the following:

A. muscaria subsp. flavivolvata (in the west, see above)
A. muscaria var. guessowii (in the east)
A. muscaria var. alba (mostly northerly distribution in the U.S. and Canada)
A. chrysoblema (named from Michigan and possibly a synonym of var. alba).

If we can put together the evidence that var. alba and chrysoblema are not distinct taxa (morphologically, Dr. Jenkins found them to be very close according to his brief examinations of the type collections), then we have a name for the species with multicolored caps…chrysoblema. If we find multiple white muscarioid taxa, we have a continuing problem.

Having an optimistic outlook, I decided to ask for all the white “muscarioids” that pop up on MO. Dr. Jozsef Geml will sequence them for us in Leiden. If we get good geographic coverage of specimens and if all the material is essentially the same species (and the same species as the red- and yellow-capped entities mentioned above), then I will breathe easy; and we can say that we followed all the rules and came up with a perfectly good already existing name of the mushroom that all of us see many times during the year across most of North and Central Americas.

This would be cool.


If you see more white muscarias, I’m very interested in using such collections for the above project. Collections from multiple locations are very welcome because we really want to have a wide enough search so that we really made an effort to find more than one species if there are two out there.

If we can solve the naming problem on this common species, it would get one of the monkeys off my back. :)

Very best,


no , kept them there
By: Jonathan M
2013-09-24 07:18:27 CDT (-0500)

I didn’t knew what would i do with a white muscaria?

No specimen, Jonathan?
By: R. E. Tulloss (ret)
2013-09-23 23:04:42 CDT (-0500)

Very best,

Rod Tulloss

Created: 2013-09-23 20:49:03 CDT (-0500)
Last modified: 2014-03-20 17:46:47 CDT (-0500)
Viewed: 49 times, last viewed: 2017-06-16 14:07:22 CDT (-0500)
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