I bought this yesterday at the nursery, unmarked. She told me the name and of course I forgot to write it down, then forgot. It was in full sun, heat tolerant, clumping. My Google searches are not helping and driving me more crazy.
starts with an "S"....
Might be Coleonema pulchellum 'Sunset Gold' http://davesgarden.com/guides/pf/go/92154/
np. The San Marcos Growers site is great for looking stuff up in your area.