Medicinal plants are an inexhaustible source of molecules with several biological activities. The main objective this research was the evaluation antimitotic and genotoxic effect by Allium cepa test methanolic extract leaves Peganum harmala, a spontaneous plant from arid zones Algeria (Timzerth, Laghouat). Different concentrations (1, 4, 10, 16 mg∙mL-1) extract, as well two standards (colchicin...