I've got two eremophila maculata aurea and only this one has this weed like? plant growing next to it. I've hesitated from pulling it because it's growing pretty little white flowers. I'm in south Arizona zone 9a
I think it is a Heliotropium. I'm leaning towards Heliotropium curassavicum. It is a very pretty plant so maybe you can leave it or transplant it to another spot in your garden if it is causing crowding.