plume grass

noun3

1. •
   Grasses of the genus Erianthus, of the Americas.
2. •
   Silver bluestem, a grass of species Bothriochloa saccharoides, having spikelets arranged in long silky plumes, that grows in swamps in the southern United States.
3. •
   Ravenna grass, Italian sugar cane (Tripidium ravennae).