Abstract: In present paper, pollen morphology of seven species of the genus Tongoloa from China was studied. They are concentrated in the Hengduan Mountains and some species extend to nearby area. The pollen grains were examined under LM and SEM. The result shows: They are rhomboidal types except T. dunnii (Boissieu) H. Wolffand T. silaifolia (Boissieu) H. Wolff which are rectangular type. All the pollen grains are not original or typical rhomboidal types. T. gracilis H. Wolff, T. elata H. Wolff are presented various shapes i.e. subrhomboidal. subelliptical and subrectangular. This is a differential rhomboidal type. So we may consider that the evolutionary trends of pollen types were from rhomboidal type to rectangular type in the genus Tongoloa H. Wolff. In our earlier paper we touched similar pollen morphology in the genus Physospermopsis H. Wolff. The pollen information suggest that Tongoloa H. Wolff may be closely related to the genus Physospermopsis.

Key words: Umbelliferae, Tongoloa

摘要： 利用光学显微镜和扫描电镜观察了伞形科东俄芹属(Tongoloa H．Wolff)7个种的花粉形态，结果表明：除宜昌东俄芹T.dunnii(Boissieu)H．Wolff和城口东俄芹T.silaifolia(Boissieu)H．Wolff的花粉为矩形类型外，其它几种的为菱形类型，然而并非都是原始的成典型的菱形，而是处于分化过程中的菱形类型，如纤细东俄芹T.gracilis H.Wolff，大东俄芹T.elata H．Wolff的花粉形态，表现出近菱形、近椭圆形和近矩形的特征，在我们近期的工作中曾涉及滇芎属Physospermopsis H．Wolff类似的花粉形态及分化情况，从花粉资料启示，东俄芹属可能与滇芎属近缘。

关键词: 伞形科, 东俄芹属, 特有属, 花粉形态, 分类学意义