“…Commelina communis L. (Commelinaceae), commonly known as dayfl ower, is a pseudometallophyte (facultative metallophyte) that is distributed extensively on both cupriferous habitats and surrounding nonmetalliferous sites ( Tang et al, 1999( Tang et al, , 2001Ye et al, 2012 ). It is an annual multibranched herb that exhibits sexual reproduction and clonal propagation ( Tang et al, 1999 ;Ushimaru et al, 2007 ;Ye et al, 2012 ). This species can also accumulate extraordinarily high concentrations of copper, with foliar Cu concentration reaching as much as 1000 mg/kg ( Tang et al, 1997 ;Shu et al, 2001 ).…”