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.