|Erect. Stems slender up to 3m tall. The leaf blades have a prominent mid rib and are approximately 45cm long and there are hairs only at the edge of the sheath. The flowering head is usually a pyramidal shape and open and the spikelets are carried on short hairy pedicles. The spikelets have short feathery white hairs. Johnson Grass is a troublesome weed in irrigation areas and crops, particularly cultivated Sorghum.