Invasive ornamental grass

Three years ago, I bought a little pot of ornamental grass. I can't remember the name, but within just a few months it started taking over my whole landscaping. I pulled tons of them out and I even got grass killer to get rid of some, but nothing happened.It still grows like crazy. Please help!
Submitted by BHGPhotoContest

Grass killers are selective; they only kill turf grass and weeds in turf grass. What you have is an ornamental, perennial grass that might be on the list of invasive plants in Michigan (http://forestry.msu.edu/Mipc/tool.htm). Try killing it with Glyphosate, the active ingredient in Round-Up, which kills any plant. You might also want to get in touch with your county extension service or master gardeners program. They can come out and identify the grass, and might have standardized procedures for dealing with it so that it doesn't come back.

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I've found that Glyphosate will not kill Liriope. I sprayed a patch last year and it didn't even wilt. If you're going to use it on your grass you may want to cut it back first (or mow it if it's a large patch) and spray the cut ends. I don't know if that will work or not. I've found the only way to get rid of it is to dig it out and stay on top of new growth pulling it out as soon as possible.
Submitted by Croakie_SC zone 8