I am using these images as references for my prairie restoration project. It is taking forever. The following information is taken from http://www.blueplanetbiomes.org/big_bluestem_grass.htm. Big bluestem is tolerant of a wide range of soils and moisture. Depending on soil and moisture conditions, it grows to a height of 3 – 10 ft. Big Bluestem is a perennial grass. The stem base turns to a blue-purple as it matures. The seed heads have three spike-like projections, resulting in another common name for big bluestem — "turkey foot." The roots are deep, and the plants send out strong, tough rhizomes, so it forms very strong sod. Big bluestem is also called tallgrass or simply called prairie tall grass.