Out of sheer luck, I think I found your mystery flower. This is from a wonderful book, Wildflowers of Houston and Southeast Texas by J. Tveten
It's attractive to butterflies! :-)
If you have a pond with tadpoles, you'll love this: our new toads are out and about. I still am amazed at how
small they are. And so...cute!
After all the attention, this little guy was ready to go back to the garden.
I have 7 ponds and water containers, so we get toads every year.
I have one toad each year that stays on our front porch and catches bugs attracted to the light.