Observation 26208: Amanita sect. Phalloideae (Fr.) Singer

When: 2009-09-20

Collection location: Big Thicket, Polk Co., Texas, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

This specimen had amyloid spores and I guess belongs in the Lepidella sect. The spores were in the range of about 8.2 X 6.0 microns. Cap 9.0cm across and stipe 16.0 cm.

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Maybe try this key?
By: R. E. Tulloss (ret)
2009-10-04 23:56:42 CDT (-0400)

This is a key to species of section Phalloideae in N. America.



I think that we could decide on a section…
By: R. E. Tulloss (ret)
2009-10-04 23:53:14 CDT (-0400)

The limbate species of sect. Lepidella usually have a limb that is rather thin. It’s outer layer is entirely hyphae and very think. It’s inner layer is largely round inflated cells which can leave a smattering of powder on the cap…especially if protected by a thin bit of the outerlayer that lies over them. At least in the Northern Hemisphere, the inner layer of the volval limb on the bulb usually has a gelatinized inner surface because the means of separating the volva from the cap involves gelatinization of an "intermediate layer (sometimes more cap skin, some more volva is involved in the gelatinization). So the inside surface of the volval limb could tell us something.

In addition, most of the Lepidella species with a limb on their bulb have elongate or very (very) narrow spores (cylindric to bacilliform) and are associated with semiarid areas and/or with deep sand that allows rain to drain away rapidly. The Atlantic Coastal Plain south of Cape Cod and the Coastal Plain of the Gulf of Mexico are habitats for such taxa in N. America. The southern part of the state of Western Australia in Australia also contributes taxa of this same group.

The appendiculate matter in the present species could be the remains of an annulus that got ripped apart. The appendiculate matter on a species of section Lepidella is often at least partly from the volva or a very friable universal veil (sometimes both).

I hope this is of some use.


nice Ron! but there are some weird aspects to this one…
By: Debbie Viess (amanitarita)
2009-10-04 17:14:20 CDT (-0400)

a bulbous base with that little root (unique!) and a membranous volva over the bulbous base.

describe it while it’s still fresh, if you can. I’ve never seen one like it. could also be something odd from setion phalloides…and our own ocreata sometimes has a marginate cap like this one.

that weird little root tho…yowza! :)

Created: 2009-10-04 14:43:02 CDT (-0400)
Last modified: 2012-06-06 17:44:03 CDT (-0400)
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