FIGURE 2.

Median-joining networks of (A) chloroplast trnL-trnF region, (B) nrITS region, (C) tpi gene, and (D) cam gene. For the two low-copy nuclear genes, haplotypes of each taxon are denoted using the first letter of its species name (except M. dodecandrum for which ‘D_R’ and ‘D_X’ are used to denote the Ruyuan and Xinyi populations, respectively) followed by a number (Table 1). Small black circles represent hypothetical haplotypes. Mutational steps are shown by the number near the connecting lines, and the number is omitted for those with only one mutational step.