What is an East Indian grass (Andropogon muricatus); also, its fragrant roots which are much used for making mats and screens. Also called kuskus, and khuskhus. [Sometimes written vetivert, and vitivert.] called?

vetiver — An East Indian grass (Andropogon muricatus); also, its fragrant roots which are much used for making mats and screens. Also called kuskus, and khuskhus. [Sometimes written vetivert, and vitivert.]. (Webster's 1913.)