House-Leek, or Sempervi-vum, L. a genus of perennial plants, consisting of 13 species, one of which, the Sempervivum teSlorum, Common House-leek, or Cyphel, is a native of Britain ; it grows on the roofs of houses and old walls, where it flowers in the month of July.

This plant is eaten by sheep and goats : its juice, when mixed with honey, is said to be of considerable service in aphthous cases, or the thrush of children ; it also affords immediate relief, whether applied by itself, or mixed with cream, in burns and other external inflammations.