Observation 141983: Amanita jacksonii Pomerleau

When: 2013-08-07

Collection location: Poplar Bluff, Butler Co., Missouri, USA [Click for map]

Who: John McDonough

Specimen available

This is the same species that I find all up and down the Pike Creek watershed here in Butler County Missouri. Low rolling hills transitioning into river delta geography.
This entry is of the various stages of development of a ring I found yesterday about 3 miles downstream of the observation found and entered here in MO # 141816 and last years 111332.
Dr. Tulloss has hinted that this may not actually be A. jacksonii and he is awaiting DNA verification to be sure.
So….I hope you enjoy the photos as much as I do. It is a really beautiful species, especially when wet.

Proposed Names

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Add Comment
Your Welcome!
By: John McDonough
2013-08-07 20:47:39 CEST (+0200)

I believe the beetles to be of the genus Pseudischyrus, but i am unsure of the species. My best guess is Pseudischyrus extricatus
If this is the case they are actually most, if not all of the larvae that I am seeing and they are actively feeding on the fruiting bodies themselves.

Thanks for the tree data.
By: R. E. Tulloss (ret)
2013-08-07 19:58:09 CEST (+0200)

When there’s rain its time to reproduce while the mushrooms can.

Go for it.

Very best,


By: John McDonough
2013-08-07 19:04:51 CEST (+0200)


Sorry you can’t be here to see this and many others!

For instance, I just stumbled onto 28 Strobilomyces strobilaceus growing around a old Red Oak in a giant ring, all of this rain has the 5th Kingdom exploding.
I hope it is not self destructing:)


Associated Host
By: John McDonough
2013-08-07 18:59:07 CEST (+0200)

I always find this species associated with mature White Oaks, most commonly giant Post Oaks.

I do enjoy the photos, John.
By: R. E. Tulloss (ret)
2013-08-07 18:28:40 CEST (+0200)

The insect ecology is also very interesting.

Very best,


By: John McDonough
2013-08-07 17:14:57 CEST (+0200)

They are almost instantly inhabited by flies laying eggs at the base of the strip and decaying sac, followed by maggots that tunnel upwards through the strip and into the cap which then becomes invaded by small black beetles.
I believe the beetles show up to prey on the maggots, but this is just my theory.

By: John McDonough
2013-08-07 17:03:29 CEST (+0200)

The “Egg” stage is 1.5 in diameter at the ground and is about 1 inch above to the top of the crown, in its mature transition it stood 6 inches above the ground and grew to 6 inches in diameter. Strip averaged diameter was 3/4 inch and fairly uniform in size.

By: John McDonough
2013-08-07 15:44:16 CEST (+0200)

Flesh is pale yellow and uniform in color, it does not bruise.
Texture is firm and crisp. Has a nice crunch when you bite it.
Smell is pleasant, but not distinctive.
Taste is very mild, sweet mushroom flavor, not bitter at all.

Created: 2013-08-07 15:29:29 CEST (+0200)
Last modified: 2013-08-07 15:29:39 CEST (+0200)
Viewed: 77 times, last viewed: 2017-09-08 01:40:59 CEST (+0200)
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