Recent studies have shown that wild Asiatic dayflower populations found growing on copper mine spoils in eastern China exhibited very high concentrations of copper within the plants, the highest in the 48 species tested. "Commelina communis" had sequestered some 361 mg/kg of copper, while the plant with the next highest concentration, "Polygonum macrathum", had 286 mg/kg. Five of the species examined, including the Asiatic dayflower, also showed high concentrations of other metals such as zinc, lead, and cadmium. The results suggest that the Asiatic dayflower is a good candidate for copper mine spoil revegetation and phytoremediation.