We have a lot of different types of roadside grasses, rushes and sedges. Here are just a few that I found along our road.
Bottlebrush grass. It reminds me of fireworks. That colony in the pic above is the same stuff.
Foxtail. Our cats like this stuff better than catnip. Seriously.
Not a great picture, but you get the idea. This is oatgrass. I like the whole 'weeping' grass posture.
This is another one that reminds me of fireworks. It's a rush, not a grass - soft rush, to be exact.