Observation 147551: Amanita Pers.

Jay Justice took it home with him. He had never seen this amanita before.
It started to rain as I took the in situ shot, so I didn’t photograph the volva.
Jay took more photos in the lab.


Otter Creek Mystery Amanita.jpg
Mystery Amanita at Otter Cr.JPG

Proposed Names

57% (1)
Eye3 Eyes3
Recognized by sight: unique and very odd. strongly furrowed, very delicate cap, darker in center. median annulus lepiota-like, consisting of a shaggy ring. long slender stipe, base with short, thick, lobed volva.
Based on microscopic features: inamyloid spores.
29% (1)
Recognized by sight: the jury is still out, but that annulus is awfully lepiota-like.
Based on microscopic features: Jay or I need to look for stipe cystidia and/or gill trama. Hopefully at the AR NAMA this month, if not before.
28% (1)
Recognized by sight
28% (1)
Recognized by sight
Used references: obs 140065

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Not sure about the lack of notifications, Debbie.
By: Dave W (Dave W)
2018-02-05 08:18:55 PST (-0800)

But, I believe it’s possible for an MO member to turn on/off the feature that sends out the emails. Could you have turned it off awhile back?

I suppose a Lepiota could develop “pseudostriations” if the cap surface lost moisture and the cuticle kinda shrunk between the lines where the gills run along the underside. I see this occasionally with some types of Amanitas from section Validae or Phalloideae, where true striations are not expected. When I first saw this obs I immediately thought “solaniolens”. The small horizontally aligned annulus is something I’ve seen on solaniolens. The colors associated with this species vary considerably. I’ve seen the radial streaks on solaniolens kinda get to be a bit like striations. But the mushrooms seen here have deep radial grooves that I associate with either Vaginatae or Caesareae. The “little Caesars” have funny little rings that often drop off. There’s at least one NA Vaginatae that has a ring/pv. I have never seen any of these first-hand. Vaginatae would seem to be a real longshot here.

the one glaring difference
By: Debbie Viess (amanitarita)
2018-02-05 07:37:35 PST (-0800)

was that lepiota-like annulus. Once dried, it became ridiculously small, too small for easy sectioning. I sent it, entire, for sequencing several years back, but never got results.

I suspect that we will never know, unless this gets recollected some day.

BTW Dave, for some reason I am not getting notices when I get responses on my obsies. Just stumbled upon your latest response today.

By: Dave W (Dave W)
2018-01-29 17:11:11 PST (-0800)

how do you explain the deeply grooved cap margin? Not a Chlorophyllum trait that I know of. Leucocoprinus may have a striate margin, but these ain’t that. Did Jay Justice submit this for DNA? You wrote that he “took it home with him.”

What is visible here looks an awful lot like obs 140065. The drawing of the stipe base (147551) is not unlike the “exploded popcorn kernel” volva of A. virginiana.

it almost looked to be a good match with virginiana …
By: Debbie Viess (amanitarita)
2018-01-29 15:07:24 PST (-0800)

but that annulus was very distinctive, and not at all pendulous or membranous.
it looked like something that you would see on a Chlorophyllum, but very very small … I sent it off for DNA, but never heard back.

I remember where I found it, though! Right next to that copperhead sighting …

First sight of the thumbnail photo…
By: Dave W (Dave W)
2018-01-05 15:51:55 PST (-0800)

I thought “solaniolens” (which can have a very pale cap color). Then, I saw the Lepiota proposal, and immediately thought “Lepiota”. Then, I zoomed in. Never saw a Lepiota with such distinct/deep striations. I’d say “Amanita” for this one. Maybe one of the diminutive Caesareae like pachtsperma or virginiana.

Received your email note, Debbie. Sounds like an interesting trip to Missouri.
By: R. E. Tulloss (ret)
2013-10-10 08:02:07 PDT (-0700)

The microscopy of the stipe will reveal whether this is in the Amanitaceae.


There is at least one lepiotoid species with a saccate volva in the Caribbean region…
By: R. E. Tulloss (ret)
2013-10-09 19:01:55 PDT (-0700)

It was misplaced in Amanita when it was originally described: A. cystidiosa.


sketch added.
By: Debbie Viess (amanitarita)
2013-10-09 17:01:35 PDT (-0700)
that’s exactly what I thought, too!
By: Debbie Viess (amanitarita)
2013-10-09 16:17:09 PDT (-0700)

I did a sketch of the volva after it hit the dryer, and observed it while fresh.

the volva was similar to what we might see in an amidella, but it didn’t stain and the cap striations almost reached the cap center!

It was definitely some kind of an amanita, though, and not a lepiota.

odd bird, eh?

Jay thought that it might be one of the caesars, but that doesn’t really fit nicely, either. I did not pull off the volva to see if the stipe lacked a bulb, but a volva it did have.

Jay has both specimens.

The ring doesn’t seem amanita-like to me…
By: R. E. Tulloss (ret)
2013-10-09 16:05:59 PDT (-0700)

I hope Jay will make some shots of the stipe base available.


Created: 2013-10-07 10:30:55 PDT (-0700)
Last modified: 2018-02-05 08:18:55 PST (-0800)
Viewed: 120 times, last viewed: 2018-02-08 02:14:25 PST (-0800)
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