Abstract The oils of Hyptis suaveolens and H. spicigera have been analyzed by GC and GC/M S. The chemical composition of the differents batches analyzed for each species varied little with different harvest years or with the condition of the steam distilled plant material. H. suaveolens oil was composed mainly of sabinene (31â38%), with also β-caryophyllene and rrans-alpha-bergamotene. H. spicigera oil contained much β-caryophyllene (23â28%), α-pinene (6.0â14.0%) and β-pinene (6.7â13.4%) as major constituents.