Observation 182698: Amanita onusta (Howe) Sacc.

When: 2014-10-12

Collection location: Ricketts Glen State Park, Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

Stipe base buried in the soil. I looked for remnants of a volval sac but found none.

Proposed Names

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Recognized by sight
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Recognized by sight
54% (1)
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It seems that the rings of volval remnants and associated recurved scales…
By: R. E. Tulloss (ret)
2014-10-14 05:53:16 PDT (-0700)

do not descend the bulb as much as would usually be expected with atkinsoniana. Hence, I would go for onusta also.

Very best,


That would explain…
By: Dave W (Dave W)
2014-10-13 21:09:18 PDT (-0700)

the apparent lack of a volval sac. I have found onusta in this location. I think the lack of a prominent basal bulb leads away from atkinsoniana. Although the stipe broke as I tried to harvest the mushroom, not much material was left in the ground. I excavated what seemed to be all of the material from the stipe base. But a tapered root like what is expected with onusta may have been left behind.

The gills are quite shallow.

I managed to squeeze a few spores out of a gill. They looked damaged. Basically elliptical.

I’m inclined to think that this is something closer to…
By: R. E. Tulloss (ret)
2014-10-13 20:48:08 PDT (-0700)

Amanita onusta or A. atkinsoniana.

Very best,


Created: 2014-10-13 20:30:49 PDT (-0700)
Last modified: 2014-10-14 05:54:18 PDT (-0700)
Viewed: 63 times, last viewed: 2017-06-18 23:20:43 PDT (-0700)
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