Blady grass
Imperata cylindrica

 Cogongrass is a perennial, rhizomatous grass (Poaceae)  that grows approximately 2 to over 4 feet in height. The leaves are about an inch wide, have a prominent white midrib, and end in a sharp point. Leaf margins are finely toothed and are embedded with silica crystals. The lower surface of the leaf blade is often hairy near the base; the upper is  hairless. The white plum e-like flowers are arranged in a silvery, cylindrical, branching structure, or panicle, about 3-11 inches long and 1½ inches wide.