the essential oil of aerial parts of warionia saharae was obtained by hydrodistillation and analyzed by gas chromatography/flame ionization detector (gc/fid), gc/mass spectrometry (gc/ms) and 13c nuclear magnetic resonance (nmr). in total, forty-three constituents, mainly oxygenated mono- and sesquiterpenes, were identified representing 89.2% of the total oil. sixteen samples of essential oil of w. saharae collected in three locations exhibited similar chemical compositions showing a chemical homogeneity. the essential oil showed poor antifungal activity against filamentous fungi, alternaria alternata, cladosporium herbarum, fusarium oxysporum and aspergillus flavus with minimum inhibitory concentration (mic) values between 4 and 8 l/ml.