Some of the different species of sedum include Sedum spectabile, Sedum kamtschaticum, Sedum rupestre and Sedum acre. Sedum spectabile's common name is showy stonecrop because of its balls of bright pink flowers.
Showy stonecrop is an upright plant that can grow 18 inches tall and have a spread of 18 inches. Like other sedums, it is a succulent and has bluish-green leaves. It thrives in full sun and well-drained soil that is neutral or slightly alkaline. The flowers attract bees.
Sedum kamtschaticum is groundcover that grows between six and 12 inches. It is tough and tolerates drought, and has star-shaped golden flowers. It also likes well-drained, slightly alkaline or neutral soil, full sun to part shade. It does not need to be watered often and does not need a great deal of care. Varieties of Sedum kamtschaticum are Variegatum and Weihenstephaner Gold.
Sedum rupestre is also drought-tolerant and does well in gravelly soils. It is also prostrate and forms mats of usually grayish-green leaves, though the Angelina variety has yellow leaves that have coppery-brown tips and turn red in cold weather.
Common names for Sedum acre are goldmoss, mossy stonecrop or goldmoss sedum. It's also called biting sedum, possibly because it contains a liquid that causes a rash.