Observation 208852: Amanita sect. Validae (Fr.) Singer

When: 2015-07-04

Collection location: Bourne Farm, Falmouth, Massachusetts, USA [Click for map]

Who: Nathan Wilson (nathan)

No specimen available

Proposed Names

57% (1)
Recognized by sight
-57% (1)
Recognized by sight: Smallish yellow amanita, with yellow patches, but a white veil and stipe.
92% (2)
Eye3 Eyes3
Recognized by sight: Non-striate margin, non-saccate volval, basal bulb present, small warts on cap, distinctly colored
Used references: Key from Mushrooms of Northeastern North America by Bessette, Bessette and Fischer.
-57% (1)
Used references: Key from Mushrooms of Northeastern North America by Bessette, Bessette and Fischer. According to this key it would have had to have had a “marginate or submarginate bulb present”. It did have a bulb, but I didn’t get a good shot of it, but I don’t remember it being marginate.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
To have a description of the Phalloideae that includes taxa with a …
By: R. E. Tulloss (ret)
2015-07-08 11:37:08 CDT (-0500)

marginate bulb indicates that taxa like A. lavendula or A. mappa were within the concept of Phalloideae that was being used in making the key.

Early in the DNA era, it was noted that such taxa had greater affinity to section Validae. Morphological evidence was gathered that was also supportive of the move of those species to the Validae. So the move of the “citrinoid” taxa (and brunnescens) to the Validae occured before 2000.

I completely concur with the Validae as the home for this specimen.

I’d need to specimen to do a determination. There are a lot of yellow to yellow-brown to orange-brown capped species in the Validae; many are unnamed.

Yours looks a bit like Amanitasp-36.”


That species is fairly well characterized both morphologically and genetically at present.

Very best,


Not striate not sure about the volva
By: Nathan Wilson (nathan)
2015-07-08 07:28:09 CDT (-0500)

Hi Rod,

Sorry I missed your note, I didn’t get a really clear shot of the base of the stipe, and I already tossed the collection.

I did check the cap margin with a hand lens and it was definitely not striate. I had used that to eliminate members of section Amanita based on the key in Bessette, Bessette and Fischer which was handy at the time. I ended up deciding it was in section Validae, but it then keyed out in BBF as A. flavoconia and it didn’t fit my concept of that species since it had a pure white stipe. Rather than doing more real work, I looked on MO and it seemed like a reasonable visual match for A. frostiana. I hadn’t realized at the time that A. frostiana is in section Amanita. A. franchetii/A. augusta did cross my mind, but I had no idea what the eastern US entry in this group was. Any suggestions? This is certainly not the first time I’ve seen this little yellow brown, non-striate margined Amanita with a white stipe and yellow volval remnants. Do you have any suggestions of species I should look at?


Hello, Nathan.
By: R. E. Tulloss (ret)
2015-07-04 23:12:06 CDT (-0500)

The cap margin is usually striate in A. frostiana. Did you get a view of the bulb from the side? In A. frostiana, the bulb usually has a “rolled sock” type of volva.

Very best,


Created: 2015-07-04 16:40:24 CDT (-0500)
Last modified: 2015-07-10 05:54:38 CDT (-0500)
Viewed: 83 times, last viewed: 2017-12-08 17:21:32 CST (-0600)
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