Distribution and relationships of E. salsugineum haplotypes. A distribution of accessions analyzed herein and in an earlier study (modified from Wang et al. 2015) B SplitsTree graph showing genetic relationships among the nine haplotypes (Median-joining network: Bandelt et al. 1999) C detailed distribution of haplotypes H1 and H2 in North-West China (modified from Wang et al. 2015).