Observation 71004: Amanita onusta (Howe) Sacc.

When: 2011-07-04

Collection location: Marshall, Calhoun Co., Michigan, USA [Click for map]

Who: Charles Seltenright Sr (Shroomin Yooper)

No specimen available

Whit Spore print.Had to look closer with a lens on white paper.Brownish-Gray warts,cap around 3 cm.Evidence of a veil around cap edge and stem near cap.


Proposed Names

17% (2)
Recognized by sight
39% (4)
Recognized by sight
59% (2)
Recognized by sight

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Add Comment
Thank you.
By: R. E. Tulloss (ret)
2011-07-06 15:20:38 PDT (-0700)


Cool You Bet I will !!
By: Charles Seltenright Sr (Shroomin Yooper)
2011-07-06 14:53:48 PDT (-0700)

Its one of my favorite woods I hunt the most.I find alot of different species in that area so its always fun to find a new species.

Possibility of dried material?
By: R. E. Tulloss (ret)
2011-07-06 04:57:36 PDT (-0700)


We don’t have a record of Michigan material on the amanitaceae.org page for onusta. If you happen to run across some nice material of this species, we’d love to see the images on MO and would ask that you dry some mature specimens for us.

Very best,


Thank you, Charles.
By: R. E. Tulloss (ret)
2011-07-06 04:10:56 PDT (-0700)

I think that this is probably Amanita onusta. It used to be very common in a roadcut SW of my home town, but the state wildlife management people cut back the embankment of the road slightly and the mushroom has not yet returned. Sadly, the same is true of several other interesting species. Wildlife Management “manages” about a half-dozen species for hunters. The rest of life in their forests can be replaced by invasive species entirely without danger of any intervention. Again…sadly.


Edited observation from my notes
By: Charles Seltenright Sr (Shroomin Yooper)
2011-07-06 02:19:18 PDT (-0700)
Would you say that the warts are a rather dark brownish gray?— EDITED
By: R. E. Tulloss (ret)
2011-07-05 14:40:48 PDT (-0700)

The shot under the cap seems to show that the there is a fluffy area at the top of the stem. Is that the case? Also, there seem to be bits of partial veil remaining on the cap edge and covering the ends of some gills. Ate these patches pieces of a membrane or areas of felt-like or fluffy material? And could you tell us about the approximate width of the cap?

Very best,


Created: 2011-07-05 04:49:20 PDT (-0700)
Last modified: 2011-07-06 15:19:44 PDT (-0700)
Viewed: 104 times, last viewed: 2019-02-14 02:40:04 PST (-0800)
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