ISSN: 0975-8585 May-June 2014 RJPBCS 5(3) Page No. 1367 Research Journal of Pharmaceutical, Biological and Chemical Sciences Comparative Essential Oil Composition Of Flowers And Leaves of Warionia saharae Benth. & Coss. Samia Mezhoud 1 , Ratiba Mekkiou 1 , Pierre Chalard 2 , Gilles Figuérédo 3 , Eric Marchioni 4 , Fadila Benayache 1 and Samir Benayache 1* 1 Unité de recherche Valorisation des Ressources Naturelles, Molécules Bioactives et Analyses Physicochimiques et Biologiques, Université de Constantine. Route de Ain El Bey, 25000, Constantine, Algérie. 2 Laboratoire de Chimie des Hétérocycles et Glucides, Ecole Nationale Supérieure de Chimie, de Clermont-Ferrand, Ensemble Scientifique des Céseaux, BP 187- 63174. 3 Laboratoire d’Analyses des Extraits Végétaux et des Arômes (LEXVA Analytique), 460 Rue du Montant, Beaumont, France. 4 Equipe de Chimie Analytique, Molécules Bioactives-UMR 7178 IPHC–Université de Strasbourg- Faculté de Pharmacie, 74 route du Rhin 67401-Illkirch cedex. ABSTRACT The chemical composition of leaves and flowers of Warionia saharae Bent.&Coss., have been examined by GC and GC–MS, the identified components constituting 95.3% and 84.1 % of the leaves and flowers oils respectively. The main constituents of leaves oil were linalool (27.7%), -eudesmol (25.7%), (E)-nerolidol (8.4%), geraniol (7.1%), -terpineol (5.5%) , nerol (2.4%), eremoligenol (2.1%), -agarofurane (1.7%) , 1,8-cineol (1.4%) and limonene (1.3%) while nerolidol (29.6%), -eudesmol (28.5%), farnesol (8.2%), linalool (3.4%), -caryophyllene (3.1%), eremoligenol (2.5%), acorenone (2.1%) were established as the main components of the flowers. These results differ from the few previous studies reported on this species. Keywords: Warionia saharae, essential oil, linalool, nerolidol, -eudesmol, geraniol, -terpineol, farnesol. *Corresponding author