Sedum is a genus of about 400 species found mainly in the mountainous areas of North America but some also in dry area of South America. Most are succulent. They are tough, drought tolerant, easy-to-grow perennials that feature star-shaped flowers in clusters blooming on fleshy-leaved plants ranging from mat-forming ground covers to clump-forming upright mounds. Some of the most popular garden plants are hybrids. Genus name comes from the Latin word sedeo meaning to sit in reference to the general growing habit of many of the sedums (they sit and sprawl over rocks). Plants in the genus Sedum are commonly called stonecrops because they are typically found in the wild growing on rocky or stony areas.