Abstract: This paper deals with the studies of pollen morphology of 8 genera including 22  species and 1 variety of Umbelliferae (Apiaceae).  They have been investigated under  both the light microscope and the SEM.  These genera can be distinguished by their  pollen characters.  The observed data listing in the following table reveal that they  can be distinguished according to shape of pollen, form of pores, sculpture of exine and size of grains etc.   1.  Shape of pollen grains (1)  subrhomboidal type:  Chuanminshen Sheh  et  Shan,  Changium  Wolff,   Cyclorhiza Sheh et Shan (2)  oval type:  Seseli L. (3)  subrectangular type   a.  thickened at the equator and rugulose:  Peuecdanum L.   b.  constricted at the equator and rugulose:  Ligusticum L.   e.  constricted at the equator and rugulose, thickened at both polar zones: Vicatia DC. (4)  equatorially-constricted type, rugulose at the equator, thickened at both  polar zones: Ferula L.   2.  Form of aperture (1)  rectangular protrude type:  Chuanminshen  Sheh  et  Shan,  Ferula  L.,   Changium Wolff (2)  circular type:  Ligusticum L. (3)  elliptic type:  Peucedanum L., Vicatia DC., Seseli L.   3.  Sculpture of exine (1)  reticulate:  Chuanminshen Sheh et Shah (2)  pitted-reticulate: Changium Wolff (3)  striate-reticulate:  Ferula L., Peucedanum L., Ligusticum L., Seseli L.,    Vicatia DC. (4)  cerebro-reticulate:  Cyclorhiza Sheh et Shan Basing upon the above pollen characters, the genera Cyclorhiza Sheh et Shah and Chuanminshen Sheh et Shan are briefly discussed.  They are two clearly delimitatednatural genera.