marram grass
noun
mar·ram grass ˈmer-əm- 
ˈma-rəm-
: any of several beach grasses (genus Ammophila and especially A. arenaria)
Example Sentences
Recent Examples on the Web Unruly tufts of marram grass resembled the furry heads of Highland cattle, hiding both the ocean view and, infuriatingly to golfers, many a pin. 
Jen Murphy, Robb Report, 28 Nov. 2021 The ranger asked us to not wander beyond specific boundaries and be careful not to trample on the marram grass, which helps stabilize the dune. Chelsey Lewis, Milwaukee Journal Sentinel, 20 Feb. 2019 Closer to the lake, the dunes are still moving and less stable, with some marram grass that helps stabilize them. Chelsey Lewis, Milwaukee Journal Sentinel, 20 Feb. 2019
Jen Murphy, Robb Report, 28 Nov. 2021 The ranger asked us to not wander beyond specific boundaries and be careful not to trample on the marram grass, which helps stabilize the dune. Chelsey Lewis, Milwaukee Journal Sentinel, 20 Feb. 2019 Closer to the lake, the dunes are still moving and less stable, with some marram grass that helps stabilize them. Chelsey Lewis, Milwaukee Journal Sentinel, 20 Feb. 2019 Word History
Etymology
of Scandinavian origin; akin to Old Norse maralmr, a beach grass
First Known Use
1834, in the meaning defined above