Here we characterize microsporogenesis and development of male gametophytes by using paraffin sections to study the relationship between the endangered mechanism and the male reproductive development.In addition,the study provides a basic information for the protection and propagation of Diplopanax stachyanthus Hand.-Mazz.The results are as follows:(1)anthers are tetrasporangiate,and the microsporangium wall is composed of epidermis,endothecium,middle layers and tapetum.The development type of anther wall is of basic type;(2)cytokinesis during meiosis of microspore mother cells(MMCs) is simultaneous,and the tetrad is tetrahedral;(3)the nature pollen is two-celled;(4)scanning electron microscope observation shows that it is obtuse-triangular in pole view and oblong-globose in equatorial view,with three apertures.The study suggests that there is no abnormal development of male reproductive structure of D.stachyanthus Hand.-Mazz..