Sedum is a large genus of flowering plants in the family Crassulaceae. The genus has been described as containing up to 600 species of leaf succulents that are found throughout the Northern Hemisphere, varying from annual and creeping herbs to shrubs. The plants have water-storing leaves. The flowers usually have five petals, seldom four or six. There are typically twice as many stamens as petals. A number of species, formerly classified as Sedum, are now a separate genus Hylotelephium.