Many of my unfortunate choices are so called Texas Natives, purchased from the annual LBJ Wildflowercenter.
A few notable ones are:
Blue Mistflower, Conoclinium coelestinum, floppy appearance, spread like wildfire.
Spiderwort....aaaah, started with one plant, I now three years later can supply plants to nurseries without seeing less of them. They are absolutely stunning in early spring when they are in full bloom. They just reproduce a zillion times faster than I would like.
Then there's the Native Texas Passion flower, It pops up everywhere, the underground runners go everywhere.
I guess the lesson learned is, planting wildflowers is a great Idea, just something that should never be executed in real gardens.
Other notables are:
4 o'clocks... they develop giant tupers, you can pull and pull, yet they come back. Never really look good, insects love chewing the leaves, always look ragged.
Liriope.... also a plant that likes to take over, i could cover nursery stock for half the us, and you still wouldn't be able to notice that I have thinned them out.