Walter’s-millet, coast cockspur – Echinochloa walteri
Some species of barnyard grass are not native to Florida. There are about 35 species of Echinochloa, 15 of which are aquatic. Some are cultivated for grain; some are serious weeds. Barnyard grass is found throughout the world. In Florida, thick stands may be found in the margins of lakes and marshes, and along roadsides. Barnyard grass is an annual grass. Its thick, erect stems grow to 5 feet tall. The leaves of barnyard grass are flat and smooth. They are typically a foot or two long, and about an inch wide. The leaf sheaths of this species of barnyard grass are smooth; however, other species have hairy sheaths. The leaves do not have ligules. Barnyard grass (like most grasses, sedges, and rushes) can be identified by its inflorescence. The inflorescence of barnyard grass is an erect or slightly sagging stalk growing at the tops of the plants. The inflorescence has several branches, each of which holds many spikelets. An easily seen characteristic of this species of barnyard grass is the bristle-like hair that sticks out of each spikelet. Barnyard grass produces many flowers and seeds. Barnyard grass is a tall grass. Its leaves are wide, flat, and smooth. Its inflorescences have branches that hold many spikelets. Each spikelet has a single stiff hair, sticking out of the top; and several short hairs on the body.