Chemical variability of essential oils in natural populations of Cupressus dupreziana.

Essential oils extracted from dried leaves of Cupressus dupreziana A. Camus, an endemic species in the Tassili n'Ajjer (Central Sahara of Algeria), were analyzed by gas chomatography coupled to mass spectrometry (GC-MS). Analyses were carried out on 164 trees of 26 natural populations in order to determine the intra-specific variability.

Chemical composition and antimicrobial activity of essential oils of Genista ulicina and G. vepres.

The hydrodistilled oils from the aerial parts of Genista ulicina Spach. and G. vepres Pomel.