In May 2011, the aerial parts including leaves and flowers of N.oleander (Figure 1) during blossoming stage were collected from the capital city of Ilam (54 13'N, 31 12E, with an altitude of about 1427 m above sea level, Ilam province. on the western border of Iran with Iraq. The mean annual precipitation temperature is 23 c and its mean annual rate is 620 mm. A voucher specimen was deposited in the herbarium of Eram botanical garden of shiraz University, shiraz, Iran. The fresh leaves and flowers were washed temperature, d at ambient with distilled water, finely powdered using an electrical stainless steel blender and stored in an air-tight container until further use Morphological features of M. oleander were determined using Flora Iranica key123l and a stereomicroscope.