This one is a bit of a mystery to me. The eastern NA version of T. caligatum that I find (uncommon) in the local oak woods looks a lot different than these. The cap surface is shaggier with darker brown scales, and the taste is acrid. These look a lot more like T. zelleri; especially like the photo in Miller's manual. But there was no foul odor or disagreeable taste as is mentioned in most decriptions of T. zelleri. These specimens had a slight but pleasant odor. The taste was also agreeable. I sliced and fried one button in olive oil with some salt and onion, and the result was good; somewhat strong flavored, but not in a bad way. So I think they are not T. zelleri, which leaves T. caligatum as the only other possibility that I can find for the brownish sheathed stalked types with the flaring ring.