Observation 180896: Amanita sect. Phalloideae (Fr.) Singer

Growing in sandy soil near pine and oak. Cap appx. 2 inches across. Spore print white.


Spores under 400x magnification
Spores under 400x magnification

Proposed Names

28% (1)
Recognized by sight
28% (1)
Recognized by sight: Section Lepidella.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks Shane,
By: groundhog
2014-10-28 15:52:42 CDT (-0400)

This material has been received and accessioned to Rod’s herbarium. We have scheduled it for DNA sequencing.
-Naomi (working with RET)

Thanks, again, Shane.
By: R. E. Tulloss (ret)
2014-10-04 05:51:09 CDT (-0400)

I look forward to seeing the material.

Very best,


Package was mailed today
By: Shane Palmer
2014-10-03 18:13:26 CDT (-0400)

Hi Rod, the specimens should arrive at the PO box address you provided by Tuesday or Wednesday of next week. I look forward to hearing about what you learn from them.

I added some microscopic spore photos
By: Shane Palmer
2014-10-01 14:38:42 CDT (-0400)

See updated photos. Rod, yes you are correct that the stems on these were mostly submerged. I picked a couple more last night and found a younger one that had the spindle-shaped bulb with the pointed volva as well. See the new observation http://mushroomobserver.org/181084 for photos.

I’ll probably make a post office run on Friday and will send both sets of samples to you then. Cheers.

Yes, I would like to look at your dried material related to this observation, Thank you..
By: R. E. Tulloss (ret)
2014-09-30 15:43:08 CDT (-0400)

My address is on this page:


The ratio of length to width is very useful in evaluating spore similarity in Amanita. This value is called Q on the website to which I referred you. The average Q for a given specimen is “bold-faced Q” and the average of all Q values ever observed for a given taxon is “bold-faced Q’”.

Amanita cylindrispora is always white in all its parts, soil can give the cap the appearance of pigmentation sometimes. Most of the stem of cylindrispora is often buried in the ground. Was this true in your case? The most signficant difference in shape that I see in your photographs is the loose nature of the saccate volva. It is often the case that there is a spindle-shaped bulb at the base of the stem in cylindrispora and the volva is attached to the bulb. This means the bottom of the volva would be pointed. I’m not sure if that is the case in your material.

There are a number of (not very well known) species in section Lepidella that are somewhat similar to cylindrispora and (hence) to your material. Since I see no evidence of red staining, I think that A. mutabilis is not a possibility in your case. In addition mutabilis is a more robust mushroom that yours.

The amanitas listed here


include a number that are known from Florida and the Gulf Coast.

A number are thought to be smaller than your species and many lack the large sack shown in your photographs. In some cases there are only illustrations based on dried herbarium specimens; so it is not easy to compare those illustrations to your photographs.

Of course, you may have come up with something that was not previously known. It happens more commonly than may be imagined; and Amanita diversity in the SE U.S.A. is probably greater than is appreciated.

Very best,


Yes I did save the spore print and the specimen
By: Shane Palmer
2014-09-30 14:59:28 CDT (-0400)

Hi ret, yes I do still have the print and two dried specimens. I have access to some compound microscopes at my school and will try to get a look at the spores tomorrow. I would also be happy to send you what I have and can collect more if you’re interested.

I recently visited Ocala National Forest and the Green Swamp area near Brooksville, and these Amanitas were very plentiful in those locations as well. I’m assuming they’re the same species; see my other observation (180884) for reference.

I’m only a beginner so pardon my inexperience, but the photos of the Amanitas in the link you provided look like they might have some pigmentation on the caps/stalks, and their shape/thickness is somewhat variable…all the ones that I’ve seen have been pure white and the same exact size/shape as in my photos with little, if any variation. I’ll keep an eye out over the next few days to see how their appearance changes as they mature.

I hope that Shane can help us find out what he photographed.
By: R. E. Tulloss (ret)
2014-09-30 14:36:30 CDT (-0400)

When Beardslee first described cylindrispora he had such a large collection or set of collections that he was able to send samples (all accompanied by the same photograph and same set of typed notes) to herbaria all over North America and Europe (at least).

The species occurs in the NJ Pine Barrens. The most recent (2009) collection that I have from New Jersey was from the Franklin Parker Preserve biodiversity study in Burlington County.

Igor Safonov posts quite a few images from that Preserve on mushroomobserver.org; maybe he will post cylindrispora…if he has not already done so.

Very best,


Something was gnawing at my memory…
By: Dave W (Dave W)
2014-09-30 13:40:04 CDT (-0400)

trying to remind me about a strange Lepidella with saccate volva.

Of course I now faintly recall a previous discussion about A. cylindrispora… about a specimen collected in FL, if I recall correctly.

This one looks like it fits both the description and habitat of cylindrispora.

Take a look at this page:
By: R. E. Tulloss (ret)
2014-09-30 13:31:10 CDT (-0400)
I notice that there is a fine fringe around the cap edge.
By: R. E. Tulloss (ret)
2014-09-30 13:30:16 CDT (-0400)

This suggests that you might in fact have a species (originally described from Florida) that looks a bit like your images and has very, very narrow spores—A. cylindrispora.

There are several species (like cylindrispora) that look a bit like members of the Phalloideae, but lack the toxins (e.g., amanitins) and belong in sect. Lepidella.

You might have one of these.

Very best,

Rod Tulloss

Did you retain the spore print?
By: R. E. Tulloss (ret)
2014-09-30 13:25:47 CDT (-0400)

If this is indeed, A. elliptosperma, then it should have ellipsoid spores. I would be interested to look at the spores on your spore print, if you have retained it.

Do you ever dry mushrooms for later study?

Very best,

Rod Tulloss

Created: 2014-09-30 03:57:03 CDT (-0400)
Last modified: 2018-01-05 11:13:56 CST (-0500)
Viewed: 109 times, last viewed: 2018-01-05 11:17:33 CST (-0500)
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