Essential Oil Composition of Two Subspecies of Nepeta Glomerulosa Boiss. from Iran
Essential oil compositions of Nepeta glomerulosa Boiss. subsp. glomerulosa and N. glomerulosa subsp. stapfiana (Bornm. ex Rech. f.) Rech. f., each gathered from two different locations, have been investigated by GC and GC/MS. 1,8-Cineole was the major compound in the oils of both collections of subspecies glomerulosa (27.4%, 30.6%), and was also a major constituent of subspecies stapfiana (14.9%, 17.8%). However, caryophyllene oxide was the predominant compound for both oils of subspecies stapfiana (32.0%, 24.1%). From the chemotaxonomic point of view, the two members of each subspecies comprised a separate group with a considerable distance from the other two, and the morphological differences of these two subspecies were well reflected in their essential oil compositions.