Okay dokey... but, I'm telln' ya when they first planted those slopes along the 210 .. it was lupine. And, it comes in multiple colors. But, maybe that died and they planted something else. I'm guessing they figured out that lupine roots wouldn't keep those slopes from washing down a sea of mud on the freeway. But, it sure did look pretty and I drove it every weekend.
So, I guess we have no photo to look at? A bush that grows 2-4 feet would likely have roots that protect the hillsides there a bit. I didn't know that lupine got tall.. my rabbits ate it every dang time I had it coming up. We'll figure it out. Are you sure they aren't oleandars? I remember when what used to be the center divider of the 10 was all oleandars for miles and miles and it was just two lanes in each direction. best, cheryl o7o