Observation 94869: Amanita sect. Phalloideae (Fr.) Singer

When: 2012-05-16

Collection location: Fulton Co., Georgia, USA [Click for map]

Who: AmatoxinApocalypse (AmatoxinApocalypse)

Specimen available

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Then the relatively large size will help you eliminate…
By: R. E. Tulloss (ret)
2012-05-29 17:30:05 CEST (+0200)

the peewees of subsect. Limbatulate…and in sect. Phalloideae.

Spore shape may help a bit. Have any of the specimens been mature enough to produce spores? Have you tried wrapping a stipe base in moist paper towels or cloth and setting the specimen upright in a coffee cup and, then, covering it with something like a tent of waxed paper to try to reduce evaporation (a wad of damp cotton or tissue on the top of the cap can also help keep the moisture in)?

You might be able to get immature material to reach sporulation that way. I’ve succeeded quite a few times … with species in all seven sections. Then you could check out the spores. The Q values can be quite high a few of the white Phalloideae and a relatively larger number of the Limbatulae. You might catch a break. :-)

Very best,


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-05-29 16:36:12 CEST (+0200)

Very robust and squat, with a thick cap and thick stem.

My guesstimations-

Cap: 8cm wide

Stem: 11cm long

These were not done growing though, because of the GA heat mushrooms must be collected and photographed immediately, often times this means collecting immature specimens.

Given your collecting area, then you have at least one other option…
By: R. E. Tulloss (ret)
2012-05-29 15:31:01 CEST (+0200)

and this would be one of the limbate species of section Lepidella in the subsection Limbatulae. The known taxa only occur in leaky ecosystems in the SE US and SW Australia.

Several of the N. American taxa have curious odors…and this can help a little, but there is evidence that the odors are either not constant or not detectable by all human noses.


Of course, you could have a species of the Phalloideae that lacks the yellowing reaction. Can you estimate dimensions of the mushroom?

Very best,


By: AmatoxinApocalypse (AmatoxinApocalypse)
2012-05-29 06:25:52 CEST (+0200)

KOH was negative.

Did you try KOH on the cap?
By: R. E. Tulloss (ret)
2012-05-19 05:56:28 CEST (+0200)


Created: 2012-05-17 04:19:10 CEST (+0200)
Last modified: 2012-05-29 15:24:49 CEST (+0200)
Viewed: 144 times, last viewed: 2017-09-17 00:53:44 CEST (+0200)
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