Abstract: 1 . The floral morphological aspects of Popiilvs adenopoda Maxim correspond very closely to those of several other species of Populus reported by other workers[1,2].2 . Stamens winter in the spore-mother-cell stage and pistillate buds winter in the nucellar primordia stage. Number of carpels invariably two, the ovary unilocular with variant parietal placentae, each placenta bears one anatropous ovule.3 . Microsporogenesis follows thr usual angios-perm pattern. The fully developed anther usually shows four layers of cell wall. When mature, the cell of endotheciuin forms fibrous thickenings and the cell of tapetum is usually binucleated. The formation of microspore follows the synchronous type. Pollens shed as single grains with two-cells.4. The ovules are anatropous with unitegmic and thick nucellus. Vascullar strands pass from glacenta through funiculus, stopping at the chalazal.!i, The achesporial cell in the ovules is hypodennal in origin. There is onlly one cell in P. adenopoda. It gives birth to a parietal cell and a sporogenous cell. The megaspore mother cell is disintegrated from the primary sporogenous cell and is rather deep-seated in the nucellus as a result of the several divisions in the ^parietal cell.6 . The megaspore mother cell usually forms a linear tetrad of megaspores. The chalazal spore develops into an eight-nucleate megagametophyte (polygonum type), which corresponds very closely to what has been observed about the embryo sac of several species of Populus by Kimura, C. 3,4 During the later stages of development the megagametophyte passes through the nucellus and settles down in the micropyle.7 . With the pollen tube reaching the megagametophyte through the micropyle, double fertilization occurs. The embryo second nucleus forms before pollens enter the embryo. Division of the primary endosperm nucleus precedes that of the zygote and initiates an endosperm of the nuclear type in which walls appear only at later stages. The first division of zygote is always transverse to the long axis of the embryo sac.