几个牡丹野生种的花粉形态及其演化、分类的探讨

该文用扫描电镜观察了芍药科芍药属牡丹组革质花盘亚组（Ｓｅｃｔ．ＭｏｕｔａｎＳｕｂｓｅｃｔＶａｇｉｎａｔａｅＳｔｅｒｎ．）５个野生种的花粉形态，初步建立了牡丹花粉形态的量化指标．花粉外壁纹饰可划分为４个类型，其演化途径是小穴状纹饰→穴状纹饰→网状纹饰→粗网状纹饰．同时探讨了这一途径与形态演化的相互关系，并通过聚类分析讨论了各个种的相互关系及延安牡丹（Ｐ．ｙａｎａｎｅｓｉｓ）的分类地位．

Pollen Morphology of Several Tree Peony Wild Species and Discussion on Its Evolution and Taxonomy

Pollen grain morphology of Sect. Moutan Subsect Vaginatae was examined under SEM and the indexes of tree peony pollen grain morphology are set up. The pollen grain morphology of Sect. Moutan can be divided into four types and its evolution trend is: foreolate→reticulate→coarse reticulate. The relationship of the evolution trends and morphological characteristics is also discussed. The taxonomic position of P.yananensis is discussed preliminarily by means of cluster analysis based on pollen grain and morphological characteristics.