Abstract
The essential oils of aerial parts of specimens of Lippia alba (Mill.) N. E. Br were analysed by GC–MS. The plants were collected at three municipalities of Pará State, Brazil, and their oils shown to be quite different. The samples of essential oils may be divided into three groups. The first, type A (collected at Santa Maria), is characterized by 1,8-cineole (34.9%), limonene (18.4%), carvone (8.6%) and sabinene (8.2%). The second, type B (collected at Belterra), is dominated by limonene (32.1%), carvone (31.8%) and myrcene (11.0%). The third, type C (collected at Chaves), is represented by neral (13.7%), geranial (22.5%), germacrene-D (25.4%) and β-caryophyllene (10.2%). © 1998 John Wiley & Sons, Ltd.
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