Abstract: Callisia Loefling and its species Callisia repens (Jacq.) L. are reported as a new naturalized plant in the Mainland of China. The population of Callisia repens (Jacq.) L. has been discovered on the house tops and wall tops in Xiamen, Fujian and Chaozhou, Guangdong, China. Callisia repens (Jacq.) L., a native to tropical America, has naturalized in Taiwan and Hong Kong before naturalized in the Mainland of China. As an ornamental plant, it is useful in vertical greening and roof greening in horticulture. Its distribution data was given and some related discussion was made.