Well, that’s what it looks like to me, but goodness knows. A quick Google search suggests either brittlebush or a dune sunflower, which I’m sort of pulling for, since it’s a member of the aster/daisy/composite family. However, another walk with a little more attention paid to the plant hosting these flowers makes it clear it’s brittlebush.
In any case, this is a good reminder that the desert is more than birds, trees, and signs. It’s flowers too.