ola species are often called stonecrops. Some authors merge Rhodiola into Sedum.Rhodiola species grow in high-altitude and other cold regions of the Northern Hemisphere. Den virtuella floran gives the number of species as 36,the Angiosperm Phylogeny Group gives it as 60, and the Flora of China gives it as abou 90, with 55 in China and 16 endemic there.The USDA Plants database lists only 3 species in the United States and Canada.Among the distinguishing characters of the genus are two series of s