The aim of this study was to investigate the phytoremediation potential promoted by Baccharis dracunculifolia DC. and Baccharis trimera (Less.) DC. incopper mining tailings area, Southern Brazil. The plants were selected considering their spontaneous growth on tailings. The phytoremediation indexes as a translocation factor (TF), bioconcentration factor (BCF), metal extraction ratio (MER) and plant effective number (PEN) were carried out. Both species showed higher concentration of heavy metals in the roots in relation to the shoots. B. trimera showed potential for phytoextraction of Zn, Cd, Cr, Pb and phytostabilization of Ba and Ni, whereas B. dracunculifolia showed potential for phytoextraction Pb and phytostabilization of Cu, Zn, and Ba. B. trimera showed higher potential in phytoremediation of the metals Cu > Zn > Cr > Ni and Cd than the B. dracunculifolia. B. trimera requires a smaller number of plants to remove 1 g of Cu, Zn, Cr, Pb, Niand Cd than the B. dracunculifolia. The values of PENs for Cu were close to those estimated for B. dracunculifolia, but the PENs (Cu) and PENt (Cu) in B. trimera are much lower, meaning that a smaller number of plants are required for decontamination. Both species showed potential for phytoremediation of metals and grew spontaneously in the tailing mining area.