mar·ram grass
noun/ˈmærəm ɡrɑːs/
/ˈmærəm ɡræs/
(also marram)
[uncountable]- a type of grass that grows in sand, often planted to prevent sand dunes from being destroyed by the wind, rain, etc.
滩草，沙茅草（用以固沙） Word Originmid 17th cent.: from Old Norse marálmr, from marr ‘sea’ + hálmr ‘stalk, stem’.