Source : Webster's Revised Unabridged Dictionary (1913)

   {Royal palmetto}, the West Indian {Sabal umbraculifera}, the
      trunk of which, when hollowed, is used for water pipes,
      etc. The leaves are used for thatching, and for making
      hats, ropes, etc.

   {Saw palmetto}, {Sabal serrulata}, a native of Georgia, South
      Carolina, and Florida. The nearly impassable jungle which
      it forms is called palmetto scrub.