The Collaborative International Dictionary of English v.0.48:

orpine \or"pine\, n. [F. orpin the genus of plants which
   includes orpine; -- so called from the yellow blossoms of a
   common species (Sedum acre). See Orpiment.] (Bot.)
   A low plant with fleshy leaves (Sedum telephium), having
   clusters of purple flowers. It is found on dry, sandy places,
   and on old walls, in England, and has become naturalized in
   America. Called also stonecrop, and live-forever.
   [Written also orpin.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Live-forever \Live"-for*ev`er\, n. (Bot.)
   A plant (Sedum Telephium) with fleshy leaves, which has
   extreme powers of resisting drought; garden ox-pine.
   [1913 Webster]

WordNet (r) 3.0 (2006):

live-forever
    n 1: perennial northern temperate plant with toothed leaves and
         heads of small purplish-white flowers [syn: orpine,
         orpin, livelong, live-forever, Sedum telephium]