Themeda quadrivalvis

Themeda quadrivalvis is a species of grass known by the common names grader grass, habana grass, and kangaroo grass, (not to be confused with Themeda triandra, which is also known as kangaroo grass). It is native to India, Nepal, and Malaysia. It can also be found in many other places as an introduced species and often a noxious weed. It occurs in the United States, New Caledonia, Fiji, Mauritius, Thailand, Indonesia, Papua New Guinea, China, the Middle East and tropical America. It is a troublesome exotic weed in Australia, especially in northern regions. It is also an agricultural weed in crops such as sugar cane and lucerne.

from Wikipedia