Still personally not sure. It doesn't split anything like maple. It splits like ash and it has one heck of a aN awesome smell. Smells like whiskey. Literally.
Sassafras. Dries quick, sparks when burned. Red color under the bark. Looks white inside when first split, but will yellow within a couple weeks. That's my guess, anyways. I always seem to go against the grain!
Also, behind the bark and between the actual wood, is a real thin layer of bark or wood of some kind. About a 16th" thin..maybe thinner.
I believe that is called "The Pflueger Layer". Named after Donny Pflueger-- the tree scientist who discovered it back in 1846.
So it smells like whiskey, and has black specks throughout the split? Does it taste like lutefisk, or does it taste good? Don't lye.
I've split some standing dead trees from my property that look exactly like that. At first I thought hickery, but could also be ash. Got lots of both around here. I'm too new to the firewood scene to know for sure, but I've got mostly hickery and/or ash, oaks (white and red, it ain't that!) and sweet gum (and poplar, but don't look like poplar either). I'm taking great pleasure cutting down the larger pod-dropper 'gums this year so it will be interesting to see if that's what it looks like once I start splitting. I'll try to remember to take pictures!