Wheat is a cereal grass cultivated for its kernels, which grow in compact heads-often called ears or spikes-at the top of its stems. The collection connects the plant with the grain harvested from it, including whole wheat berries, coarsely cracked wheat, and flour produced by milling the kernels. These forms mark different stages of processing: berries remain whole, cracked wheat is broken into smaller pieces, and flour is ground finely for baking and other foods. Red wheat is a type of wheat grain distinguished by the reddish color of its outer bran; wheat varieties also differ in traits such as kernel hardness and suitability for particular foods. Together, the subjects span wheat's recognizable growing form and its use as a staple cereal grain.