Weed in n Balt co
This looks like nutsedge, a weed. This out competes any desirable plant. http://extension.umd.edu/hgic/yellow-nutsedge
You did not mention where this is located. This is not an easy weed to control. See the above website for control information in a lawn.
In landscape beds, it is best to remove the entire plant (including the root/rhizome system) by digging around the plant’s base. This will help ensure that you will not get regrowth from the nutsedge’s underground rhizomes. A nonselective herbicide which contains glyphosate provides only marginal control.