Intiangrass (Sorghastrum nutans)

Extracted from Missouri Department of Conservation website:
Indian grass is a native perennial bunch grass with flowering stalks 2–7 feet tall. Occurs in upland prairies, glades, savannas, and openings of dry upland forests; also in old fields, pastures, roadsides, railroads, and dry, open, disturbed areas. Indian grass is a major component of tallgrass prairie and glade vegetation. Like most other prominent tall grasses of tallgrass prairies (such as big bluestem), Indian grass is a warm-season grass that photosynthesizes most efficiently during the hottest part of the summer, a time when cool-season grasses may go dormant.