Observation 77951: Amanita sect. Caesareae Singer

When: 2011-09-24

Collection location: Rock Island State Park, Warren Co., Tennessee, USA [Click for map]

Who: Brian Adamo (adamo588)

No specimen available

9cm cap diameter, solitary, growing on ground in mixed forest



Proposed Names

30% (2)
Recognized by sight
54% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: R. E. Tulloss (ret)
2011-10-05 09:07:52 AEDT (+1100)

THen I’ll offer a guess…

Very best,


Sorry, Rob
By: Brian Adamo (adamo588)
2011-10-05 05:24:18 AEDT (+1100)
I wish I had a way of knowing what specimens you might be interested in. If I collected and saved every specimen, I would need a warehouse – especially with all the monster lepidellas I’ve come across lately. I’m not serious enough about the study of fungi to keep them for my own use. If I come across another example, I will surely save it for you. I still haven’t acquired any Melzer’s yet. I’m waiting for my next checkup to ask my doctor for a prescription so I don’t have to pay for an office visit! I have posted an additional photo of the full-length longitudinal split, but it probably won’t help much. For some strange reason I didn’t cut the base, so it is intact. It doesn’t look like much of a bulb could fit in the sac, though.


Do you still have this (dried or fresh?)
By: R. E. Tulloss (ret)
2011-10-05 04:02:40 AEDT (+1100)

Did you get a picture of the bottom of the stem when you cut the mushroom in half longitudinally? I ask because I’d like to eliminate the possibility that there was a little bulb inside the apparent volval sac.

If you have the specimen, do you have Melzer’s Reagent?

There are not many described taxa in section Caesareae that have pileus pigment distributed in what appear (in your top pic) to be “radial hairs.” One candidate would be A. spreta or something rather similar. This would be the direction to follow up if the spores are inamyloid and the stem completely lacks a bulb—-is “totally elongating”.

A little bulb inside the sac and amyloid spores would make the most likely section the Phalloideae.

From the striate margin on the cap one is tempted to go with the Caesareae; however, there is a non-zero chance that striations could appear on a very thin-fleshed cap in the Phalloideae (or on an oldish specimen in that section, which doesn’t appear to be the case here).

This would be an interesting collection to examine in more detail.

Nice, detailed pix.

Very best,


Created: 2011-10-04 14:02:23 AEDT (+1100)
Last modified: 2011-10-05 09:08:32 AEDT (+1100)
Viewed: 42 times, last viewed: 2017-09-14 17:11:26 AEST (+1000)
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