Keywords Biosystematics,Aster ageratoides,Polyloid,Complex,Morphology,Clonal plant,ITS,Origin,Dispersal,Cytology,Cytogeography,Evolution,Intergeneric Hybrid,New Variety;

• 物种生物学;三脉紫菀;多倍体;复合体;形态学;克隆植物;细胞学;细胞地理学;ITS;起源;扩散;演化;属间杂种;新变种;