beachgrass

Short definition from Wiktionary

Noun

1. 1
   Any grass of the genus Ammophila.
2. 2
   Ammophila arenaria, a coarse grass native to sandy beaches of Europe (north to Iceland) and northwest Africa.
3. 3
   Ammophila breviligulata, a coarse grass native to sandy beaches of eastern North America, including the shores of the Great Lakes.