Here is a better shot of the foliage. It is evergreen. It was purchased in Houston at a native plant nursery, the name is gone from memory. I thought the tag said it was a salvia, but the flower form does not look like a salvia.
It grows to about ten inches tall in bloom. Shown here with salvia ‘May Night’ and an unknown geranium. I have guessed that it is a veronica of some sort, but don’t know. It spreads nicely and is a great, drought tolerant plant. It has been divided several times and makes a great filler in a sunny well drained spot. Does anyone know it?