中文摘要：

采用扫描电子显微镜对十字花科8属12种植物的花粉形态特征进行了观察分析.其中8种为首次报道.观察结果表明：4族8属12种十字花科植物花粉形态的一般特征为：花粉粒长球形至超长球形;极面观三裂圆形,少数四裂圆形;外壁纹饰为网状或细网状纹饰;三沟,偶四沟.12种植物的花粉可划分为5种类型：（1）花粉粒长球形,网状纹饰,三沟;（2）花粉粒超长球形,网状纹饰,三沟;（3）花粉粒长球形,细网状纹饰,三沟;（4）花粉粒超长球形,细网状纹饰,三沟;（5）花粉粒长球形,三或四沟,网状纹饰.十字花科花粉形态特征在不同族间、不同属间以及同属不同种间均没有明显规律,在十字花科分类过程中,不宜单独以花粉形态特征作为依据.

英文摘要：

Pollen morphology of 12 species belonging to 8 genera of Brassicaceae were observed by using scanning electron microscope（SEM）,among which 8 species were reported for the first time.The pollen morphology of 12 species belonging to 8 genera is very similar,their shape varies from prolate to perprolate with reticulate or reticulate-fine sculpture.The pollen grains are most tricolpate（rarely teracolpate）.Five pollen types can be distinguished based on the shape of pollen grains,the size of the areole and the number of the aperture：（1）Pollen grains three-colpate,prolate,with reticulate sculpture;（2）Pollen grains three-colpate,perprolate,with reticulate sculpture;（3）Pollen grains three-colpate,prolate,with reticulate-fine sculpture;（4）Pollen grains three-colpate,perprolate,with reticulate-fine sculpture;（5）Pollen grains three-colpate or four-colpate,prolate,with reticulate sculpture.There is not distinct rule about grains morphology on the level of tribe,genus and species.It is not suitable for identification in Brassicaceae only by morphological characteristics of pollen.