Elymus arenarius sunan kimiyya ne na nau'in ciyawa da aka fi sani da "Lyme grass" ko "Sand ryegrass." Ciyawa ce mai dorewa wacce ta dace sosai don girma a cikin yashi ko wuraren zama na bakin teku. Kalmar “elymus” ta fito ne daga kalmar Helenanci “elymos,” wanda ke nufin “wani irin masara ko hatsi,” yayin da “arenarius” ya samo asali ne daga kalmar Latin “arenarius,” ma’ana “girma cikin yashi.”