Observation 109283: Amanita sturgeonii Tulloss, Q. Cai and L.V. Kudzma nom. prov.
When: 2012-09-10
No herbarium specimen

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The ones seen…
By: Dave W (Dave W)
2012-09-11 21:31:36 EDT (-0400)

in the linked obs


don’t look much like 109283 in the photos, which I took today (Tuesday 9/11). But 5 days ago they were pure white and looked much like A. bisporigera. KOH yellow on the cap.

As I recall
By: walt sturgeon (Mycowalt)
2012-09-11 18:07:06 EDT (-0400)

It did turn yellow on the cuticle with KOH. The disc can become tan or olivaceous. The volva sac is free limbed but a short way down it is attached.
It is usually more robust than A. bisporigera. A collection was sent to Alexander Smith and he came up with A. phalloides which it obviously is not.I have found this in the summer but it tends to fruit late, often in October. Red oak is the usual associated tree and it seems to prefer lawns as opposed to growing in the woods. I have found it in 4 sites in Ohio and one in W. NY.

My notes say that Walt reported that his material sometimes turned yellow.
By: R. E. Tulloss (ret)
2012-09-11 15:15:46 EDT (-0400)

Walt, can you clarify this point? I have none of my old notebooks at hand…just my laptop.


Thanks Rod.
By: Dave W (Dave W)
2012-09-11 14:27:10 EDT (-0400)

I think these may be the same as what I saw last week… in a cemetery. I may have time to swing by that spot today. So maybe I can make a collection.

Does this one turn yellow in KOH?

Let me see if I can get this right. Walt can correct me as necessary.
By: R. E. Tulloss (ret)
2012-09-11 14:04:13 EDT (-0400)

When Walt sent material to me many years ago (the first collections came in 1983 and 1986), he emphasized the short, stocky stature of the fruiting bodies. I measured the spores and thought that they matched A. bisporigera.

Walt was unsatisfied with that response; so we left the issue open; and I assigned a temporary code to the collections. (Amanita sp-O01 would be its name if it were on-line on the WAO site, but it’s not posted there.)

Walt continued to send me some now and then to provoke me to do more work on them. Recently he has found one or more additional sites at which he collected the short, stocky fruiting bodies.

A couple of weeks back, I sent some of this material and a group of collections of typical bisporigera from different geographic localities to have the ITS locus sequenced for all of the collections.

From what I have heard, I will not be getting info back for several weeks (exact time not determinate at the moment). When the info comes back, I’ll tell Walt about it; and I’ll also post the sequence information in GenBank and set up links from the www.amanitaceae.org website to the sequences in GenBank. Walt and/or I will report back to interested persons on MO.

Very best,


Walt or Rod….
By: Dave W (Dave W)
2012-09-11 13:27:12 EDT (-0400)

What are the characters that separate this type form A. bisporigera? Last week I came across some “Destroying Angels” growing on a lawn near an oak. Since I’m used to seeing (presumably) bisporigera in the woods, this seemed a bit unusual to me.

That’s right. It’s off to the folks who will turn it from a “rumor” of an organism to a…
By: R. E. Tulloss (ret)
2012-09-11 02:22:03 EDT (-0400)

a sequence of something…possibly still without a name…but nevertheless, comparable to other sequences (possibly without names).

Later to day or tomorrow, I may have time to put my temporary number on this taxon. We’re running for a bus in about 1 minute.


By: walt sturgeon (Mycowalt)
2012-09-10 18:06:11 EDT (-0400)

Yes and the collection I sent you more recently. I think you sent it off for a look at the DNA.

Walt, this is the species that you first sent me years ago…isn’t it?
By: R. E. Tulloss (ret)
2012-09-10 16:32:27 EDT (-0400)


Created: 2012-09-10 15:12:16 EDT (-0400)
Last modified: 2016-05-05 23:45:28 EDT (-0400)
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