And I live in the mountains in zone 7B. Mine are yellow and orange (on separate plants, not mixed), and look like those described. Yes, they do bloom for several days, especially if you dead-head. The flowerets open along the scape for up to a couple of weeks, here. If I cut the scape before seeds form, others appear. I have a few that have self-seeded, but the garden is in the center of my ten acres, so they won't get away from me even if they would grow in the dry chaparral. They are a lovely bright spot in the garden.