Sorghastrum nutans
From Wikipedia, the free encyclopedia
Indiangrass (Sorghastrum nutans), also called Indian grass, is a North American prairie grass, and is the official state grass of Oklahoma. Indiangrass is a perennial bunchgrass, prominent in tallgrass prairie, along with big bluestem (Andropogon gerardii), little bluestem (Schizachyrium scoparium), and switchgrass (Panicum virgatum).