The essential oils of aerial parts of three samples of Lantana camara L. collected at different places in the Amazon Region were obtained by hydrodistillation and analysed by GCâMS. The main constituents found in the oil of leaves and thin branches of a specimen collect in the State of Amapá (sample A) were limonene (16.5%), α-phellandrene (16.4%), germacrene-D (13.2%), β-caryophyllene (10.8%) and sabinene (8.9%). The major components identified in the oil of leaves and thin branches of a specimen collected in the State of Roraima (sample B) were germacrene-D (28.4%), germacrene-B (9.1%) and β-caryophyllene (5.6%). The specimen collected in the State of Pará (sample C) furnished oils from leaves plus thin branches and flowers, separately. Both were dominated by γ-curcumene+ar-curcumene (27.6%; 31.9%), α-zingiberene (19.2%; 15.5%) and α-humulene (10.7%; 9.5%), respectively. Copyright © 1999 John Wiley & Sons, Ltd.