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Zingiber zerumbet (L.) Smith leaf and rhizome oils, obtained by hydrodistillation, were analyzed by gas chromatography mass spectroscopy (GC-MS). Twentynine components were identified in the leaf oil. The major components were zerumbone (37.0%); a-caryophyllene (16.4%) and camphene (9.2%). Thirty components were identified in rhizome oil with the main components being in zerumbone (46.8%); a-caryophyllene (19.0%) and 1,5,5,8-tetramethyl-12-oxabicyclo[9.1.0]dodeca-3,7-diene (4.3%). The compositions of both oils varied qualitatively and quantitatively.

GC-MS analysis of essential oil of Blumea balsamifera (L.) DC. leaf revealed the presence of 50 components, contributing to 99.07% of the oil. The dominant components in the oil from leaves were borneol (33

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