I had a quick question. I was going to the beach last weekend and my mother noticed some Crepe Myrtles with an interesting shape. They almost had an umbrella shape. There were the ubiquitous multiple trunks, but the tops were almost symmetrically even domes. Almost like umbrellas. There was even an inverted bowl shape underneath, because the branches were hanging down. Everything looked sharp, so they could potentially be pruning it regularly to keep it looking that way.
My question is whether this is something the tree does naturally as it ages, or if it's a result of forcing the tree through pruning, which I don't want to do for the health of the tree and my time.
I looked for pictures of similar trees, but couldn't find any. I've included two that are as close as I can get. It's more sharply defined than these two, though.
Edit: Here is a picture that is more representative of the Crepe Myrtles in my area. I know this one isn't that large, but typically, the ones around here grow up and out as apposed to drooping.