The steam-distilled oil from the leaves and stems of Polygonurn odoratum Lour. from North East Victoria, Australia was analyzed by GC and GUMS. Forty-nine compounds were detected of which seventeen were positively identified. The main constituents were found to be decanal(27.73%), dodecanal(44.05%) and decanol (10.88%). A number of other compounds not previously reported were also identified.