Great banner, Paul.
Mexican (?) Evening Primrose.......one of my favorite invasive species.
At my previous home, it was a problem, and difficult to control, but I love the pink blooms. They seem
to glow in the right light. I have it growing in one area now, and just cut it back when it's done blooming.
They take very little water, and poor soil.
I've tried to establish it in other parts of the garden, but it seems happy in just one small area.
Seems to working for you, too.