Thanks, guys for the replies.
I was guessing elm because it looks like an outer bark mess made by elm bark beetles. it's still a mystery to me, didn't really have an identifying smell, either. About average weight for a piece this size, but not as dense or heavy as white oak. Got plenty of that for comparison.
Did a Google image search for 'elm bark', didn't really come to a conclusion. If it warms up next week, I'll try to take some pics roughing it out on the lathe.
Harrison, at your service!