(n.) A coarse grass found on sandy beaches (Ammophila arundinacea). See Beach grass, under Beach.
Example Sentences:
(1) We roam over sand hills knotted with marram grass and wildflowers, singing in case we disturb sunbathing adders, imagining Tarka ducking in and out of warrens.
(2) The dunes where Nixon worked 20 years ago, planting marram grass to stabilise the sand banks, have already gone.