Salt grass washed by the tide.
salt grass definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of various grasses growing in salt marshes or alkaline soils; esp., any of a genus (Distichlis) of North American perennial grasses
salt grass definition by American Heritage Dictionary
Any of various grasses, especially North American perennial plants of the genus Distichlis, that grow in salt marshes and alkaline areas.