Observation 169590: Amanita sect. Vaginatae sensu Zhu L. Yang

When: 2014-07-12

Collection location: Vienna, Virginia, USA [Click for map]

38.53° 77.14°

Who: Penny Firth (pfirth)

No specimen available

Fruiting on ground, poor clay soil beneath black oak tree, in damp grass area. Cap ~5 cm.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Yes, that is a similarity.
By: R. E. Tulloss (ret)
2014-07-13 22:59:17 -05 (-0500)

The thimble is fragile in populiphila and thin (but not too friable) in “rooseveltensis”.


should’ve been more specific …
By: Debbie Viess (amanitarita)
2014-07-13 14:23:35 -05 (-0500)

considering the audience! I meant the basal volval remnants, and the fact that it comes off in a thimble-shaped all of a piece.

The volva on this critter doesn’t usually leave fragments on the cap as in populiphila.
By: R. E. Tulloss (ret)
2014-07-13 13:40:17 -05 (-0500)


the volva on this grisette …
By: Debbie Viess (amanitarita)
2014-07-13 12:57:22 -05 (-0500)

reminds me of A. populiphila.

You’re welcome, Penny.
By: R. E. Tulloss (ret)
2014-07-13 08:47:42 -05 (-0500)

The shovel was a good idea.

Very best,


Thanks for the pointers
By: Penny Firth (pfirth)
2014-07-13 08:31:45 -05 (-0500)

I will watch for it. I actually dug this one up with a shovel because I suspected it might be an Amanita and the ground was so hard I was pretty sure the stem would break if I just tried to pull it up. I picked the clay soil away from the sac to get the photos.

Best wishes, Penny

I think that this may fall under my provisional name “rooseveltensis.”
By: R. E. Tulloss (ret)
2014-07-12 22:24:22 -05 (-0500)

The spore should not be globose…more like ellipsoid.

If I am write about the possible ID, then it will reappear after good rains under the oak tree…several times during this summer. Sometimes, its stem will very easily separate from the little volval sac.

Very best,


Created: 2014-07-12 19:09:21 -05 (-0500)
Last modified: 2014-07-12 19:20:10 -05 (-0500)
Viewed: 38 times, last viewed: 2017-06-18 10:12:15 -05 (-0500)
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