Five Saudi ARrAyhan (O. basilicum L.) accessions were studied to establish a possible relationship between them through their morphological characteristics and essential oil composition. The morphological parameters were recorded at the beginning of the flowering stage and the essential oils, obtained by hydrodistillation, were analyzed by gas chromatography (GC) and GC/mass spectrometry (GC/MS). Among the ARrAyhan (O. basilicum L.) accessions , three phenotypes were distinguished on the basis of leaf shape, area, and plant height, weight and branching. The Saudi accession varied in their proximal content as well as their mineral content. As for the composition of the essential oils, Linaloo

Keywords : ARrAyhan,Ocimumbasilicum L., Kingdom of Saudi Arabia, chemotypes,morphological characteristics, essential oilcomposition