Sorghum is a genus of flowering plants in the grass family Poaceae, which includes about 25 species. Some of these species have grown as cereals for human consumption and some in pastures for animals. Sorghum is usually grown as an annual, harvested after one growing season and can grow to a height of 4 m (13 ft). Sorghum may also be referred to as broomcorn and may have been cultivated from wild ancestors in Ethiopia.