The Collaborative International Dictionary of English v.0.48:

Sea chickweed \Sea" chick"weed`\ (Bot.)
   A fleshy plant (Arenaria peploides) growing in large tufts
   in the sands of the northern Atlantic seacoast; -- called
   also sea sandwort, and sea purslane.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Sea sandwort \Sea" sand"wort`\ (Bot.)
   See Sea chickweed.
   [1913 Webster]