Stonecrop is a common name for perennial herbs of the genus
Sedum, belonging to the family Crassulaceae. The genus is native to temperate and cold regions of the Northern Hemisphere, and contains many species cultivated for rock gardens and flower-bed borders. Two European species grown extensively in U.S. gardens are the mossy stonecrop,
Sedum acre, a low, creeping evergreen with golden flowers, and the live-forever, or garden orpine,
Sedum telephium, an erect perennial with cream-colored blossoms. Both plants spread from cultivation and are widely naturalized in North America.