At my new house, I have a group of Q. fusiformis like that. It's pretty common in central Texas in the wild but I'm not sure how to create like that. It's just very unique.

It is called a "motte". Those sprouts are off the same root system. That happens on about 25% of Q. fusiformis that you see.

These oaks are smaller than the regular Coastal Live Oaks.
They should be planted closer together to get a closed canopy sooner. They probably have a slower growth rate also.

Scotjute,

After living all over Texas, I see amazing wide variety of Live oak. In Houston, they are huge. In central Texas due to widely varied rainfall amount, they look very scraggly. Not sure how you'd create unique look like that. I imagine it'd take a loooong time for that to happen.

I have transplanted a seed grown Q.F. about 25 ft from another Q.F so it will help with the eventual canopy without being too crowded. I agree with the slow growth for now anyway. I get about 1 ft a year but am hoping for more as they get more foilage, and get established. Yeah, Dricha "motte" was the word I was looking for, don't know how I came up with COPSE. The photos of mature Q.F made me want to try them.