Sempervivum calcareum is a succulent perennial native to the southern Alps in New Zealand and belongs to the Sempervivum plant genus and Crassulaceae (stonecrop) family. It forms a large rosette of thick green leaves with reddish-purple tips.It’s also known as a hen-and-chicks plant, as it multiplies via offsets formed around the mother plant.The perennial houseleek grows a series of symmetrical densely packed rosettes with a dome-shaped appearance. The thick succulent leaves are often blue-green or light green with reddish-purple tips at the pointed ends.The plant starts with a single rosette, but short-stalked offsets eventually form a dense mat around the base plant.