Observation 104677: Amanita spreta (Peck) Sacc.

When: 2012-08-10

Collection location: Bourne Farm, Falmouth, Massachusetts, USA [Click for map]

Who: Nathan Wilson (nathan)

Specimen available

Proposed Names

22% (2)
Recognized by sight: Typical Amanita stature. Brown with a sack-like volva. Not sure of the species on this one.
40% (3)
Recognized by sight
Used references: MO discussion for this obs.
91% (2)
Eye3 Eyes3
Used references: Based on Rod’s suggestion and looking at other images from the site. First time I’ve used this name or seen what might be this species.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
For the last several years,…
By: R. E. Tulloss (ret)
2012-08-11 11:54:16 EDT (-0400)

we have had at least one good fruiting per year of A. spreta in Roosevelt…each year at a different location associated with oaks.


Virgate pileus, relatively short volva, short marginal striations, and…
By: R. E. Tulloss (ret)
2012-08-11 01:13:43 EDT (-0400)

coloring (except for the rusty discoloring) suggests A. spreta.


Section Caesareae…
By: Dave W (Dave W)
2012-08-11 00:12:17 EDT (-0400)

does appear to be the best fit.

The short striations
By: Eric Smith (esmith)
2012-08-10 23:50:18 EDT (-0400)

and apparent lack of a bulb also seems to fit Section Caesareae.

Oh… I forgot about the large “drab caesar”…
By: Dave W (Dave W)
2012-08-10 23:46:08 EDT (-0400)

that you find in Upstate NY, Bob. Good point! Cape Cod (albeit… apparently one of those alternative fungal universes :-) is not all that far removed from your area.

The “widely attached volva” is not something I have noted/considered. But I think I see what you mean… The sac is adhered to the stipe (from the bottom up) over 50%.

By: Eric Smith (esmith)
2012-08-10 23:13:41 EDT (-0400)

a drab caesar, like Amanita murrilliana. Volva seems widely attached to the stem base.

This seems very interesting to me.
By: Dave W (Dave W)
2012-08-10 23:05:17 EDT (-0400)

I don’t profess to know section Phalloideae well enough to rule out this possibity, but as far as I know, the striate cap margin is at least unusual for this category. Ring on stipe rules out section Vaginatae, and the gestalt of the mushroom does not impress me as something from section Caesareae.

Surely ret will eventually shed light upon this.

Created: 2012-08-10 21:57:07 EDT (-0400)
Last modified: 2012-08-11 11:54:37 EDT (-0400)
Viewed: 115 times, last viewed: 2017-06-28 08:16:46 EDT (-0400)
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