Observation 336607: Amanita pseudoinsinuans

When: 2018-10-03

Collection location: Baton Rouge, Louisiana, USA [Click for map]

Who: Logan Wiedenfeld (LoganW)

Specimen available

Growing under sweetgum and elm, with water oak nearby.



Proposed Names

82% (1)
Based on chemical features: The distinctive DNA derived from the voucher for this observation, as well the cap color support novelty for this taxon.

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= Observer’s choice
= Current consensus


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A page for this species is being started here:
By: R. E. Tulloss (ret)
2019-06-04 19:29:05 CDT (-0400)


The false insinuator joins the “ringed ringless amanitas” of the Americas.

Thanks, Logan!

Very best,


Let us not forget that the first ringed Amanita (although I didn’t know it at the …
By: R. E. Tulloss (ret)
2019-05-30 23:12:28 CDT (-0400)

time) was found near where Washington’s army came ashore after crossing the Delaware (Washington’s Crossing State Park, Mercer County, New Jersey). It sure isn’t common in these parts. For multiple ringed ringless amanitas go to the Gulf Coast.

Very best,


Very cool!
By: Logan Wiedenfeld (LoganW)
2019-05-30 18:36:30 CDT (-0400)

I wonder if there’s some evolutionary reason for the prevalence (relative to the rest of North America) of “ringed ringless” amanitas in this area.

I also wonder if I’ve mistaken this for insinuans other times in the past.

Great work, Rod! This is exciting.

Went straight to the aminataceae website…
By: Dave W (Dave W)
2019-05-30 17:07:28 CDT (-0400)

as soon as I checked this out. What the heck is that? A frail/fragile-looking thing from section Amanita? No! It’s (presumably) the second known ringed NA taxon representing the Vaginatae!

Nice Obsie/find!!!
By: Jon Shaffer (watchcat)
2019-05-30 13:20:17 CDT (-0400)
You have found another new species, Logan.
By: R. E. Tulloss (ret)
2019-05-30 12:49:18 CDT (-0400)

I think we should call this pseudoinsinuans.

There are quite a few differences in the “proposed fungal barcode” alone, mostly in the ITS2 region. The difference in cap color looks like it might be a visual marker.

It seems that the Gulf Coast region has more than okra, shrimp, alligators, and Liquidambar styracifula, rain, and high temperature with other tropical and semitropical parts of the world. The number of ringed members of the Vaginatae in your area now vies with the number of such species in SE Asia and central Africa.

Very best,


Thank you, Logan.
By: R. E. Tulloss (ret)
2018-10-04 09:53:05 CDT (-0400)


Already dried
By: Logan Wiedenfeld (LoganW)
2018-10-03 23:15:11 CDT (-0400)

I have the two fruiting bodies already dried, and oddly, they olive-brown color (which I noticed too) turned grey. I puzzled over them for a bit but ultimately decided that the fragile crumbly volva, the weak ring-like structure, and the mushrooms’ stature were each checks in the insinuans column.

I’ll send them (along with a couple other vouchers, including the other sect. Vaginatae material from today) your way soon.

Some difference in cap colors…
By: R. E. Tulloss (ret)
2018-10-03 22:54:58 CDT (-0400)

Let’s check them all out.

Can you dry the different cap colors separately, Logan?

Very best,


Created: 2018-10-03 15:05:04 CDT (-0400)
Last modified: 2019-08-15 14:09:52 CDT (-0400)
Viewed: 196 times, last viewed: 2019-08-15 15:39:19 CDT (-0400)
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