Crassula muscosa (Linnaeus, 1760), also named Crassula lycopodioides (Lamarck) or Crassula pseudolycopodioides, is a succulent plant native to South Africa and Namibia, belonging to the family of Crassulaceae and to the genus Crassula. It is a houseplant grown worldwide and commonly known as Rattail Crassula, Watch Chain, Lizard's Tail, Zipper Plant and Princess Pine.