中国东北牻牛儿苗科（Geraniaceae）花粉形态与系统分类学研究

本文对中国东北牛儿苗科Ｇｅｒａｎｉａｃｅａｅ老鹳草属Ｇｅｒａｎｉｕｍ和牛儿苗属Ｅｒｎｄｉｕｍ植物计２属，１４种，２变种及１变型的花粉形态进行了较系统的研究。并对本科花粉形态进行了分类处理，编制了花粉形态科种检索表。结果表明，本科花粉如按萌发孔类型、外壁雕纹式样可以分为二大类：即三孔沟，外壁雕纹瘤状（Ｇｅｒａｎｉｕｍ）三沟，外壁雕纹网状（Ｅｒｏｄｉｕｍ）。在老鹳草属种及种下等级的分类处理中，花粉粒大小、萌发沟长度、外壁覆盖层网眼均匀性、直径大小、网脊上纹饰及外壁雕纹瘤纹突起均匀性、大小及瘤上纹饰都具有较大的分类学意义。花粉形态分类与经典分类对本科分类群的处理意见相吻合。大大丰富了本科分类微形态的证据。

POLLEN MORPHOLOGY AND SYSTEMATICS OF GERANIACEAE IN NORTHEARTERN CHINA

Pollen morphology of 2 Genus, 14 species, 2 varieties and 1 form of Geraiaceae in Northeastern China was investigated. And the key to species of Geraniaceae was done. The results showed that there are two types of pollen graino. (1)3-colporate. Sculpture pattern of exine tuberculate (Geranium ), (2) 3-colpus. Sculpture pattern of exine reticulate (Erndium ). In the taxonomy of Geranium. the size of pollen grain. length of colpus, even degree of exine tectum. lumina diameter. ornament on the muri and even degree of tubercles of exine sculpture, size, sculpture pattern on the tubercle vary with each taxon. And the taxonomy of pollen morphology of Geraniaceae reached a consensus with the classiacl systematics of this family.