Source : Webster's Revised Unabridged Dictionary (1913)

Stonecrop \Stone"crop`\, n. [AS. st[=a]ncropp.]
   1. A sort of tree. [Obs.] --Mortimer.

   2. (Bot.) Any low succulent plant of the genus {Sedum}, esp.
      {Sedum acre}, which is common on bare rocks in Europe, and
      is spreading in parts of America. See {Orpine}.

   {Virginian}, or {Ditch}, {stonecrop}, an American plant
      ({Penthorum sedoides}).

Source : WordNet®

stonecrop
     n : any of various northern temperate plants of the genus Sedum
         having fleshy leaves and red or yellow or white flowers