Living in the Bay Area, I adore the tall grasses growing on the eastern foothills - you get a nice close-up taking e.g. I-680 to Livermore - and would love to r

Living in the Bay Area, I adore the tall grasses growing on the eastern foothills - you get a nice close-up taking e.g. I-680 to Livermore - and would love to replace much of my yard with the native grasses, but I don't even know where to begin in identifying what species they are, and where to get seed.