Dune or Scrub Beach Grass (ammophila) is a genus consisting of two or three very similar species of grasses .. common names for these grasses include Marram Grass, Bent Grass, and Beachgrass .. these grasses are found almost exclusively on the first line of coastal sand dunes .. their extensive systems of creeping underground stems or rhizomes, allow them to thrive under conditions of shifting sands and high winds, and to help stabilize and prevent coastal erosion .. first piuc shows what you are buying .. the two following pictures are with copies of the original grass, plus other grass and rocks added, which can be found in my catalog..