I found variability in acorn shape. The more spherical acorns came from the tree in the photo. Is this Q. geminata? I've read that Q. geminata tends to have leaf margins that curl inwards and tend to have deeper/ more noticeable leaf veination. Additionally, that they have thicker twigs and are more pubescent on the new shoot growth and leaf undersides compared with Q. virginiana. I do remember thinking some of the trees had twigs that appeared thicker than what I'm used to (at least with the ones in my yard). It would be neat to have 2, rather than 1, member of the Quercus series Virentes native here.