abstract the leaf oils of the australian members of the genera geijera and coatesia have been examined by gc and gc/ms. coatesia paniculata gave a consistent oil in which the principal components were -pinene (27-57%) and -caryophyllene (4-12%). geijera linearifolia gave a leaf oil dominated by spathulenol (10-17%), geranyl acetate (4-9%), bicyclogermacrene (3-6%) and (e,e)-farnesol (23-30%). four chemotypes of geijera parviflora were detected: (1) in which geijerene/pregeijerene and linalool predominated, (2) in which linalool and - and -eudesmol predominated, (3) in which -pinene and camphene predominated and (4) in which phloroacetophenone dimethyl ether predominated. geijera salicifolia also existed in several chemotypes, one of which contained large amounts of phloroacetophenone dimethyl ether (> 65%). also present in this particular chemotype was the geijerene/pregeijerene and attendant c12h18 complex, totaling approximately 5%. in a second sample of this chemotype, this complex was absent. a second chemotype of this species contained -pinene (38.6%), camphene (22.4%) and limonene (7.5%) as principal components.