Source : Webster's Revised Unabridged Dictionary (1913)

Saltwort \Salt"wort`\, n. (Bot.)
   A name given to several plants which grow on the seashore, as
   the {Batis maritima}, and the glasswort. See {Glasswort}.

   {Black saltwort}, the sea milkwort.

Source : WordNet®

black saltwort
     n : a small fleshy herb common along North American seashores
         and in brackish marshes having pink or white flowers
         [syn: {sea milkwort}, {sea trifoly}, {Glaux maritima}]