Essential oils of Haplophyllum tuberculatum (Forssk.) A. Juss., produced from plants collected in the United Arab Emirates, were analyzed by GC and GC/MS. The composition of the oils varied considerably. Those obtained from plants collected in May (1997 and 2001) were similar, with α-phellandrene (10.7–32.9%) being the major component and with signifcant amounts of β-caryophyllene (6.3–12.8%), β-pinene (7.6–8.0%), limonene (4.0–9.6%) and δ-3-carene (5.5–6.0%). However, the oil distilled from plants collected in April (1998) had major components of linalool (15.0%), linalyl acetate (10.6%), β-caryophyllene (9.7%) and α-terpineol (6.7%). The compositions of all three oils prepared from UAE collected plants differed signifcantly from those reported for the same species col-lected in Egypt and Iran.
- Haplophyllum tuberculatum
- Linalyl acetate
- Variable essential oil composition
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