When: 2017-08-17

Collection location: Tallahassee, Florida, USA [Click for map]

Who: Russell de Grove (rdegr)

Specimen available

near pine
growing from sandy loam and duff, rising from beneath a thick mycelia matt it did not appear to be associated with, volva deeply buried
1 specimen, nearby specimen 287275 may not be same, written up separately
also similar to 287272 found in the same general area the previous day

diameter 56mm
thickness 4mm at edge of umba 6 mm center umba
upturned edge and umbonate, firm umba
buff umba fading to gray across cap, paler near stria, dark ring at stria

stria 5/28

no appendiculate matter
odor slightly sweet, flavor sweet but also slightly peppery/acrid
no staining or bruising surface or context

tan in mass white in side view


length 157mm
slight curve, slight flair at pileus
No annulus

distance from stipe base to highest point 35mm
thickness at midpoint < 1mm
tough/paper thin

Spore Print: white


penetrates- does not rise from

Proposed Names

80% (1)
Recognized by sight: volva, no annulus, stria
82% (1)
Based on chemical features: nrLSU sequence is distinctive

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
Rod, please feel free
By: Russell de Grove (rdegr)
2019-09-12 19:33:20 PDT (-0700)

You are absolutely free to use these images in any way you please.

I’m thinking these might be
By: Ron Pastorino (Ronpast)
2019-09-12 17:53:05 PDT (-0700)

close to these from Louisiana https://mushroomobserver.org/242384

The cryptonom. temp. for this new species will be Amanitasp-F17.”
By: R. E. Tulloss (ret)
2019-09-12 17:51:27 PDT (-0700)


Russell, I would like to use some of your photos on that page.

Very best,


We have extracted nrLSU with a little fragment of the proposed barcode gene…
By: R. E. Tulloss (ret)
2019-09-12 17:16:03 PDT (-0700)

attache from three of your specimens that do, indeed, appear to be the same species: MO #287274 – #287276. An interesting species. We cannot extract the mid-region of nrITS from any of three sample. We don’t yet have all the reads we expect for all three collections; so some of the sequences may become longer when more data comes in.

The sequences we have show that the species belongs to the provisional series Penetratrices.

All three observations will get a new moniker of some kind. As the species is quite distinctive.

A great find.

Thank you very much for sending these collections to me.

Very best,

Rod Tulloss

A very interesting little species.
By: R. E. Tulloss (ret)
2018-01-09 08:01:30 PST (-0800)

I’m glad that you’ve found it more than once. I hope we will have DNA sequences for this material within the coming year.

Very best,


Herbarium Rooseveltensis Amanitarum (R. E. Tulloss) has received specimen.
By: mcmacher
2017-08-31 11:43:00 PDT (-0700)

We have received the dried specimen. Thank you. It is being accessioned in Rod’s herbarium as RET 795-6.