MATERIALS AND METHODS
Plant specimen was collected from Gangetic region (surrounding of the river Ganga) of West Bengal which is situated in the eastern part of India. Herbarium specimen of the species was then prepared. Next the plant is identified and deposited in the herbariaof Vidyasagar University. Plant sample was washed in deionized water and some plants were fixed in alcohol for anatomical studies. Twigs, roots, stems, leaves, flowers, seeds and pollens were collected time to time during visit. Flowering twigs were collected for morphological study. Pollens were collected for pollen study. During morphological studies, flowering twig and herbarium samples were examined through the conventional taxonomical procedure adopted by Bentham and Hooker (1873) and Prain (1903).