- A grass of the genus Ammophila.
- Ammophila arenaria, a coarse grass native to sandy beaches of Europe (north to Iceland) and northwest Africa.
- Ammophila breviligulata, a coarse grass native to sandy beaches of eastern North America, including the shores of the Great Lakes.
- (A. arenaria): marram, European marram grass, European beachgrass
- (A. breviligulata): American marram grass, American beachgrass
Ammophila arenaria — see marram