Digitaria californica
 Digitaria californica is a species of grass known by the common name Arizona cottontop. It is native to the Americas where it can be found in the southwestern United States Mexico Central America and South America.This perennial grass forms a clump of stems reaching up to a meter in height. The branching root system can reach one meter deep. There are no rhizomes or stolons. The leaf sheaths around the stems can be very hairy to woolly. The leaves are usually short and narrow.