Identify this acorn?

[Champdog21]

I was able to pick up a few acorn this afternoon. I think they are Swamp White Oak but I picked acorns from 3-4 different trees. They all looked the same but the acorns were different. Some had a more flat base and others were more rounded. The underside of the leaves felt fuzzy. Please help me decide.

 

[j-bird]

I am leaning toward swamp white oak.

However - I thought that about a tree I found earlier this fall in an urban setting as well and someone here suggested it was a Schuette Oak (which is a cross between a SWO and burr oak) - in any case great find and its a member of the white oak family. The ones I found are not as big as I expected for acorn production, planted in an urban setting and LOADED with acorns, mine however had the bark peel on the limbs more like a burr oak.

 

[shedder]

Peeling bark on 1-4 " branches is a big clue.

Looks like SWO to me.