Under oaks


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Recognized by sight: All three appear to be the same type.

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Thanks Justin,
By: groundhog
2013-07-24 13:17:31 CDT (-0500)

This specimen has been received and accessioned into Rod’s herbarium. Rod and I looked at it under the microscope and found spores that seemed too narrow for A. longipes. Rod is planning on measuring more spores soon and we will let you know what we find.

Exactly what I was thinking
By: Justin (Tmethyl)
2013-06-19 14:05:31 CDT (-0500)

The deeper they mycelium goes the less competition it will encounter.

We also have a non-Coastal Plain taxon that radicates to an unknown depth…
By: R. E. Tulloss (ret)
2013-06-19 13:52:43 CDT (-0500)

as does the western A. smithiana…in fact, morphologically, they would both be placed in Bas’ stirps Rhopalopus.

Our magniradix “nom. prov.” is an inhabitant of the Piedmont Plateau and uplands forest with diverse broad-leafed trees, non-sandy soil, and (often) relatively good drainage. I don’t have an environmental hypothesis explaining anything about the bulbs in smithiana and magniradix.

For some reason it doesn’t hurt ‘em to worm their way up from very far down in the soil. Maybe there is an advantage of attaching to roots that many other fungi don’t go diving for?


Very best,


bulb theory for lepidellas…
By: Debbie Viess (amanitarita)
2013-06-19 11:07:35 CDT (-0500)

how would that apply to PNW species like the deeply rooting lepidella,
Amanita smithiana?

Didn’t we also find a dog-legged longipes in PA at that NEMF foray? I seem to remember one in a drinking cup at breakfast one morning, collected right on campus (by either you or Benjamin).

By: Justin (Tmethyl)
2013-06-19 10:57:39 CDT (-0500)

I did save and dehydrate this specimen for you as well.
I think your hypothesis on this one is accurate, as you can see on the base of the bulb, they were growing in plain sand. Which drains quickly.

The bulb is not the same as the volva.
By: R. E. Tulloss (ret)
2013-06-19 09:33:39 CDT (-0500)

The bulb is often simply tissue that didn’t develop into specialized tissue. You might think of it as the remnant of the primordium whose role in development was not to transform utterly into a specialized tissue. It doesn’t become full of water driven pistons like the stem (for example) and it doesn’t become a protective coating (like the universal veil) that has to have a method of breaking up, or simply breaking, in order to let the fruiting body do its spore generating thing.

The bulb is the bulb. Especially in longipes and other radicating species it may be that the bulb is connecting to deeper than usual hyphae whose position has evolved because of the speed with which water drains away from the surface soils in places like the Atlantic Coastal Plain.

Very best,


I think this is probably Amanita longipes., and
By: R. E. Tulloss (ret)
2013-06-19 09:26:12 CDT (-0500)

I don’t have any material of this species from Florida in the herbarium; hence, I hope you will find another collection and have the opportunity to dry it.

Very best,

Rod Tulloss

I broke the volva off while excavating
By: Justin (Tmethyl)
2013-06-19 08:07:58 CDT (-0500)

Sorry for the confusion, it did have a volva like the other two.

Appears to be mixed collection, Justin.
By: Daniel B. Wheeler (Tuberale)
2013-06-19 00:28:46 CDT (-0500)

Two of the specimens look to be Amanitas. Not sure what the bulbous base specimen is.

Created: 2013-06-18 22:21:08 CDT (-0500)
Last modified: 2018-01-03 15:16:04 CST (-0600)
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