Sedum lanceolatum is a species of flowering plant in the stonecrop family known by the common names spearleaf stonecrop and lanceleaf stonecrop. It is native to western North America and occurs in western Canada and the United States. It is distributed from Alaska to Arizona and New Mexico and as far east as South Dakota and Nebraska. It grows in exposed, rocky mountainous habitat at moderate and high elevations, up to 4048 meters in the Rocky Mountains. The plant persisted and evolved on sky islands and nunataks in these ranges during glaciation events during the Pleistocene epoch.