Observation 211974: Amanita penetratrix
When: 2015-08-03
Herbarium specimen reported

Notes: I’m sure Rod dried some.

Proposed Names

86% (1)
Eye3 Eyes3
Recognized by sight: grisette with hard, prominent umbo, rooting stipe.
Used references: RET IDed.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Sometimes we do get behind on accessioning new material.
By: R. E. Tulloss (ret)
2016-01-05 01:36:45 CST (-0600)

So it is always good to check if you have a concern about whether material has reached us.

I hope you have a good 2016.

Very best,


Thanks Rod.
By: Dave W (Dave W)
2016-01-04 21:13:16 CST (-0600)

I was just a bit worried maybe it didn’t make it into the summer package. I collected the mushroom (213059) right around the time I assembled a package that included a fair amount of material.

The collection is not yet sampled.
By: R. E. Tulloss (ret)
2016-01-04 20:50:22 CST (-0600)

However, it is in the next batch to be sampled. Linas is actively working on the material now in his hands. I expect we will create our next batch of samples before the end of the month.

Very best,


Hello, David.
By: R. E. Tulloss (ret)
2016-01-04 20:43:41 CST (-0600)

I received the material. It has the accession number 706-5 in our herbariium.

I will check our DNA queue for its status.

Very best,


Rod, I believe I sent you some potential penetratrix material…
By: Dave W (Dave W)
2016-01-04 19:14:00 CST (-0600)

from NE PA. It should have been in the package I sent last summer,
obs 213059 . If you don’t have it, let me know and I’ll look through what I have here at my home.

You’re welcome, Debbie.
By: R. E. Tulloss (ret)
2015-10-21 13:30:07 CDT (-0500)


thanks, Rod!
By: Debbie Viess (amanitarita)
2015-10-21 11:17:54 CDT (-0500)

and thanks to your Team, at both home and University, for continuing to “lift the skirts” on this very interesting Genus! OK, that analogy doesn’t fit so well for a grisette, but still, you get my drift. ;)

Diving into the huge mess that our NA grisettes represent is only for the brave!

Thanks for continuing to share your findings so openly. It takes a myco-village!

Something of interest…
By: R. E. Tulloss (ret)
2015-10-20 12:24:17 CDT (-0500)

All the penetratrices from the NEMF2015 collections that came home with ret have the same “proposed fungal barcode” gene (nrITS) and the same nrLSU gene. This whether they were white with a brown umbo or gray-brown with a brown umbo.

A gray-brown collection from a past COMA foray shares the same nrITS sequence.

Other cap colors on similar fruiting bodies (with hard umbos and long, ground-penetrating stems) MAY NOT be within the group.

It looks like the Missouri collection (with subzonate yellowish tan and brown cap) may not be included.


Some tentative geographic data is now on WAO.
By: R. E. Tulloss (ret)
2015-08-05 11:47:35 CDT (-0500)

On the techtab, here:


in the “material examined” data field.

Yes, this collection was dried in part.

The NEMF2015 foray produced many, many collections of solitary specimens of this species. The longest stipe measured was 220 mm, with over 130 mm underground.

A full range of cap colors were on view from white to pale tan to medium brown. If there are more than one species present in the mix, maybe we now have the material to figure that out.

My luck with collections of this species did a big turn around in New London. Many collectors produced good collections. My dryer didnn’t fail. One or two collectors even got down to the absolute bottom of the stem and retrieved the saccate volva. Thanks to all of you.

Very best,


Created: 2015-08-05 10:56:51 CDT (-0500)
Last modified: 2015-08-05 10:56:54 CDT (-0500)
Viewed: 72 times, last viewed: 2016-10-24 00:08:12 CDT (-0500)
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