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Perhaps you should look at more white oaks:
http://www.hort.uconn.edu/plants/q/queal...
http://plants.usda.gov/java/profile?symb...
http://www.uwgb.edu/biodiversity/herbari...
http://www.cas.vanderbilt.edu/bioimages/...
These are shade leaves. The acorns are wrong for the swamp white oak.
No need to apologize, though - good to rule things out as well as in!
If they're growing that close together, they are likely all fruiting off of the same mycelium. It would be very unusual to see a mixed colony of fungi that close together.
It is not a fly agaric. The universal veil is not attached to the stalk in the right place and the scales on the cap are flat, not raised and warty.
Leaves aren't right for Eupatorium rotundifolium, and it is not known from this part of the state.
Very small! Total plant height is about 6", and they are usually in with a bunch of other stuff. I almost always find them along stream banks; this one was in a flood-carved channel parallel to the river.
Thanks! I almost stepped on it :/
No worries! They can be tough to shoot and tough to ID, but every once in a while we find a Species of Concern, which is worth noting.
The top of the head is more useful for ID - did you get a picture of the area right behind the eyes?