Abstract:

Floral morphological variation was studied by multiple statistical analysis to supply the basis for spreading and applying of Rudbeckia hirta L. It can be seen that（1）there was distinct diversity in the flower morphological variation of Rudbeckia hirta L. Varity with different degrees are shown among samples in the following items，which are number of ray florets inside color，flower diameter，number of ray florets type，center flower diameter，ray florets length，ray florets width，ray florets length/width，inflorescence type，ray florets type，base orientation of ray floret，edge curly of ray floret，ray floret gesture of lengthwise，primary color inside，comparison between inside and outside of ray floret colors，distribution of ray floret’s inside minor color and ray floret minor color inside geometry. Meanwhile lower variation- coefficient appeared in the number of ray florets，inner wheel ray floret gesture of lengthwise and ray floret minor color inside. Number of keel，upper surface texture，shape of cross-section at widest point and top shape of ray floret were stable traits.（2）Results of R cluster analysis concurred with those of PCA analysis showed that the morphological degrees are relatively independent among selected items.（3）Q cluster analysis classifies the Rudbeckia hirta L. variation plants into four groups，which are named A，B，C，D.

Key words: Rudbeckia hirta L., floral morphological variation, multiple statistical analysis