Fig. 3

Phylogenetic analysis. (a) ML tree of B. chinense based on whole plastid genomes. The numbers above the branches are bootstrap values in order. (b) Geographic distribution of the three clades in B. chinense (the sample used for detecting the content of saikosaponin is marked with a yellow square). (c) SSa + SSd content of 10 different batches of B. chinense. (d) SSa content of 10 different batches of B. chinense. (e) SSc content of 10 different batches of B. chinense. (f) SSd content of 10 different batches of B. chinense