Eremophila longifolia F.Muell. occurs as a shrub or small tree in the Murchison district of Western Australia. Our attention was first directed to the essential oil by the aromatic odour of plants growing at Sandstone. Steam distillation of the leaves gave an aromatic oil in 5 -8 % yield. Gas chromatography showed the presence of only two major components, which were separated by fractional distillation and identified as safrole and eugenol methyl ether. Gas chromatography of the original oil showed a mixture of eugenol methyl ether and safrole (4 : 1), and similar analysis of the forerun and residues indicated less than 3% of all other components. Subsequent field observations at the same time have indicated the absence of oil glands in plants near Mt. Magnet, although their presence is consistent at Sandstone. The presence of aromatic compounds in this oil is in marked contrast to other Eremophila oils that have been examined. The wood oil of E. Mitchelli Benth. affords a group of sesquiterpene ketones related to eremophilone (Bradfield, Penfold, and Simonsen 1932 ; Djerassi, Markley, and Zalkow 1960), whereas the leaf oil of E. oppositifolia R.Br. appears to consist mainly of sesquiterpene alcohols (Jefferies, Knox, and White 1961).