Aerial parts of laurel (Laurus nobilis L. (Lauraceae)), thyme (Thymus vulgaris L. (Labiatae)), lavender (Lavandula officinalis Chaix ex Villars (Labiatae)) and lavendin (Lavandula hybrida Rev. (Lavandula officinalis Chaix x Lavandula latifolia Medik.; Labiatae)) were collected in different geographic area from Argentina: Villa Mercedes (33º40' S; 65º27' W), San Luis Province; Sierra de la Ventana (38º08′ S; 61º47′ W) and Colinas Verdes (37º54′ S; 57º49′ W), Buenos Aires Province, respectively