Fig. 3

Clustering dendrogram of Malus taxa based on important phenotypic traits of floral organs. At Euclidean distances of 21.31 and 11.63, all the 142 taxa were divided into two groups (A, B) and five sub-groups (A₁, A₂, B₁, B₂, and B₃), and the characters of floral organs varied significantly between groups and within sub-groups. Taxa belonged to the same sub-groups were labeled with the same color, and the floral organs dynamic map of typical Malus taxa for each sub-group was presented in the right rectangular box with corresponding color