Anonymous wrote:Liriope. It's basically a weed, it will grow anywhere.
The spreading/creeping kind of liriope is terrible. The clumping kind is better if you want to keep it under control. The clumps will get bigger over time but it doesn't spread as much and isn't that difficult to keep under control.
The majority of actual grasses require full sun. I have some of the large grasses in part sun (the low end of part sun) - they're ok, but the growth is much less than the same type in full sun. For places that may not have enough sun, there are types of carex are also good options (and there are native varieties). The ones I have are in areas that stay wetter (no standing water, but the areas that drain more slowly and don't dry out as well) Like liriope, they're shorter, I don't think I've seen any that get over a foot or so tall. But - they're pretty and can deal with more shade than many true grasses. They can be deer resistant (clumping liriope is not) and make good ground cover.
For medium sized grass, I love the the fountain grasses. I'm not sure which if any are natives. I had a bunch when we moved in - like a lot of the ornamental grasses, they clump and spread slowly, so easier to keep under control. I think they look really nice through the winter.