2 7 as showed in table 3 the ratio of the pb accumulation of the aboveground part to the pb concentration in the soil is all larger than 1 0 but much smaller than the ratio of the cd accumulation of the aboveground part to the cd concentration in the soil which means that emilia sonchifolia l has far greater accumulation efficiency and greater remediation to cd than to pb as an important ornamental plant emilia sonchifolia l not only satisfies four basic indexes of the cd hyperaccumulator comprising a threshold content a contaminant transfer a tolerance and an accumulation coefficient within a certain cd concentration range but also satisfies four basic indexes of the pb hyperaccumulator within a certain pb concentration range thus emilia sonchifolia l is recognized as the cd hyperaccumulator and the pb hyperaccumulator wherein emilia sonchifolia l has better accumulation efficiency and better remediation to cd than to pb from the index of the accumulation coefficient the plants of emilia sonchifolia l is both the cd hyperaccumulator and the pb hyperaccumulator roots of the plants are able to absorb and accumulate a large amount of cd and pb in the contaminated soil and transfer the absorbed cd and pb to the aboveground parts.