Although it has been known to happen, psychic plant ID is pretty difficult.......we really need to see a photo :-))

Can we see a photo of the entire tree?

I'll make a rough guess of a live oak but not familiar enough with these species to be certain.

Definitely an evergreen oak species. Staking should come off after a year in place.

Yup, stakes will come off in the spring. Live oak makes a lot of sense because of the vigorous suckering. Seems to fit the rest of the description too. The thing that threw me off was that in the example I had been looking at, the drawing depicted the leaves as pointy at the end, whereas mine are rounded off at the end.