If you can identify this flower, please add a comment. It's very small and low-growing, almost a ground cover. Seen on the western ridge trail.
From Mangini Ranch February 28, 2009
Yes, I saw a 10 meter wide patch of this at Galvin today. -Brad-
I agree -- amsinckia. Flower is a good match on CalPhoto.
Almost certainly an amsickia or fiddleneck though I can't see whether its got the distinctive unfurling fiddleneck flower stalk