Observation 171121: Amanita kryorhodon Tulloss & Kudzma nom. prov.

On ground in mixed woods that include birch, maple, spruce, cedar, balsam fir and red and white pine. Cap is greasy, striate margin. Gills have a pinkish cast. Stem is white, hollow, no ring, no bulb, persistent white volva. No odor

Donna found this at the end of our walk so I had no chance to take in situ photos.

Proposed Names

75% (2)
Recognized by sight: no ring, no bulb, persistent volval sac at base of stem
57% (1)
Recognized by sight: greasy white cap with lined margin, pinkish fimbriate (if I understand the meaning correctly) gills, association with birch
Used references: http://www.amanitaceae.org/... seems to fit this European species, some sources said Amanita alba is a synonym
29% (1)
Recognized by sight: gills seem more pink here than what is described for A. rasitabula
91% (2)
Eye3 Eyes3
Based on chemical features: nrITS sequence

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks Terri and Donna,
By: groundhog
2014-08-18 15:27:11 CDT (-0400)

This material has been received and accessioned to Rod’s herbarium. We have scheduled it for DNA sequencing.

since white amanitas can occur in any colored genus …
By: Debbie Viess (amanitarita)
2014-07-25 12:34:31 CDT (-0400)

and all that we know is that this mushroom is a vaginate amanita, but certainly not “vaginata,” then IMO we can only categorize it at this point in a broader sense: Amanita sect. Vaginata.

Thanks, Rod
By: Terri Clements/Donna Fulton (pinonbistro)
2014-07-25 09:47:07 CDT (-0400)

for the information. I forgot to put in my MO notes that the cap cuticle was quite thick and peeled easily to the center. I’m not sure why I tried it except that the cap felt so unusually greasy to the touch. Not sure whether or not this has any significance.


The name Amanita alba.
By: R. E. Tulloss (ret)
2014-07-24 21:56:23 CDT (-0400)

This names has been applied to many taxa; however, the first use was apparently as an additional name for Amanita ocreata (a posterior homonym, a synonym failing to have nomenclatural priority). While alba can be used at a rank (like variety) lower than species, at species rank, the epithet is “occupied” in Amanita and cannot be correctly applied to any taxon.

Very best,


The pinkish gills may be a help in the future.
By: R. E. Tulloss (ret)
2014-07-24 21:50:23 CDT (-0400)

Some of the white taxa in the NE U.S. have gills that become orangish white or pale orangish white on drying. This color can look pink in some lights or at first glance. I learned to recognize it by using the Kornerup and Wanscher color book. A lot of “pink” gills in the Vaginatae and in the Caesareae are actually very pale orange.

Maine seems to me to be one of the U.S. hotspots for the Vaginatae. Every time I have collected in Maine (too few times, too few), I come home with what appear to be new taxa in the Vaginatae.

Very best,


Hi Rod,
By: Terri Clements/Donna Fulton (pinonbistro)
2014-07-24 21:15:38 CDT (-0400)

Be happy to send this when dry along with the other specimens you’ve asked for.


Hello, Terri and Donna.
By: R. E. Tulloss (ret)
2014-07-24 21:10:33 CDT (-0400)

You have entered into another maze with this one.

I had generated a couple of names that I though might cover some of the white Vaginatae in North America; but, as with the rubescent taxa and the white destroying angels, there are more white Vaginatae in eastern North America than Horatio dreamed of in his philosophy.

My concept of A. rasitabula includes a small fruiting body and a rather fragile, but unstaining volval sac. Yves Lamoureux has a concept called albiceps which is distinct. My homolae seems (based on the genes) to include more than one entity and all seem different from rasitabula and albiceps. So we need another little project focusing on white Vaginatae in eastern North America—that would also include populiphila, which (again) is a distinct species from the others as far as I can tell.

If you would be so kind as to share the present collection in whole or in part, I will see what it can tell us and keep you informed.

Very best,


Created: 2014-07-24 20:37:42 CDT (-0400)
Last modified: 2017-12-28 20:03:22 CST (-0500)
Viewed: 65 times, last viewed: 2017-12-28 20:03:11 CST (-0500)
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