Observation 60264: Amanita Pers.
When: 2010-06-27
No herbarium specimen

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Exhaustive explanation
By: Andrew Khitsun (Andrew)
2010-12-05 16:22:42 PST (-0800)

More than exhaustive explanation – thank you. I will definitely be in that area next year. I might encounter this mushroom again. Please advise on how to prepare the specimen with a purpose to ship it and where to send it (and what particular groups or genera you’re interested in – just make sure you stay in legal territory :)

probably A. praecox
By: R. E. Tulloss (ret)
2010-12-05 14:15:40 PST (-0800)

Given the time of year and the oak-hemlock forest type, there is a very good chance that this is the western-most record (by far) of Amanita praecox. It would be very cool to have a dried specimen of this (and other stuff) from Wisconsin Dells…if you should have the time and opportunity to collect, dry, and send some east to Roosevelt.

The absence of a ring from the very outset of fruiting body expansion in Amanita section Amanita is not usually thought of as common because people may think first of the muscarioid and pantherinoid fungi of that section; but there are ringless species in the group. A number are tropical, but we have A. farinosa, A. albocreata, and A. parcivolvata (for example) in N. America east of the Rockies.

Species in the gemmatoid group are often described as having rings that fall away during or shortly after expansion of the caps. This is true for A. gemmata, A. russuloides, A. praecox, A. xylinivolva, and others.

A partial description for A. praecox can be found here:


Very best,


No ring.
By: Andrew Khitsun (Andrew)
2010-12-05 08:19:49 PST (-0800)

Dell of Wisconsin River State Natural Area, one of the most diverse plant communities in the state, has Hemlock growing there and plenty of different species of Oak (I can’t say the same about firs – just not sure).
My concern is that this Amanita doesn’t have a ring – that’s what thwarted my attempt at identification. Any comments on that?

Was hemlock or Balsam fir present?
By: R. E. Tulloss (ret)
2010-12-05 06:33:30 PST (-0800)

I see oak leaves. Is that a hemlock or fir needle on the stem? From the time of year, this could be A. praecox. It has a gemmatoid appearance. The lack of clear, longish striations on the cap margin eliminates the russuloides-like taxa that have come up in the last few weeks on MO.


Created: 2010-12-04 19:40:47 PST (-0800)
Last modified: 2011-04-01 16:36:13 PDT (-0700)
Viewed: 54 times, last viewed: 2016-10-22 18:52:23 PDT (-0700)
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