Vetivert Oil (aromatherapy)

Vetiver Oil is an amber colored to grayish brown, olive brown or dark brown viscous liquid whose odor is sweet and very heavy woody-earthy, reminiscent of roots and wet soil, with a rich undertone of “precious wood” notes. Oils distilled from too young rootlets and very freshly distilled oils may display some “green” potato-peel-like or asparagus-like topnotes.
Arctander, Steffen . Perfume and Flavor Materials of Natural Origin (p. 752). 

vetiveria zizanioides
Chrysopogon zizanioides