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Abstract
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In this research, the developmental stages of ovule and pollen inAstragalusstevenianusof the Fabaceae family were studied. For this purpose, fluorescence and polarization optical microscopes and various cytohistological techniques were used. The results of this study showed that anthers have tetrasporangiate and its tapetum layer is of secretory type. The cytokines were synchronous and the microspore tetrads are of both tetrahedral andtetragonal type.Pollengrains werethree- cellsandtriporated at the time of pollination. are oval shaped. The anatropous, crassinucellated and integuments.Theendotheliumlayer is made up of one layer cells, and the genesis of the embryosacs of polygonom type. After the meiosis division, megasporetetrads has a linear arrangement. On the outer surface of the pistil, many trichomes were observable. In this spices, the number of antipodal cells is more than three. Based on our bibliographical studies, this is the first report about the development of reproductive organs of the species.In polar view, they are circular shaped and in elliptical view, they
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